:root{
  --navy:#1B2340;
  --navy-2:#262f52;
  --navy-3:#323d6b;
  --paper:#F5F5F0;
  --paper-2:#ECEADF;
  --paper-3:#E2DFD0;
  --highlighter:#F4D35E;
  --highlighter-2:#f9e28a;
  --coral:#FF6B6B;
  --sage:#3A7D5C;
  --ink:#1B2340;
  --ink-soft:#5B6285;
  --white:#fff;
  --radius:14px;
  --shadow: 0 10px 30px rgba(27,35,64,0.12);
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;width:100%;max-width:100%;overflow-x:hidden;overflow-x:clip;}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font-family:'Space Grotesk', sans-serif;line-height:1.55;-webkit-font-smoothing:antialiased;
  width:100%;max-width:100%;overflow-x:hidden;overflow-x:clip;
}
h1,h2,h3,h4,.display{font-family:'Fraunces', serif;font-weight:600;letter-spacing:-0.01em;margin:0;}
p{margin:0;}
a{color:inherit;}
button{font-family:inherit;cursor:pointer;}
img,svg,video,canvas,iframe{max-width:100%;height:auto;}
::selection{background:var(--highlighter);color:var(--navy);}
:focus-visible{outline:2.5px solid var(--navy);outline-offset:2px;}
.wrap{max-width:1160px;margin:0 auto;padding:0 28px;}
.wrap-narrow{max-width:760px;margin:0 auto;padding:0 28px;}

main,section,header,footer,nav{min-width:0;max-width:100%;}
main{width:100%;}
.wrap,.wrap-narrow{width:100%;min-width:0;}
input,textarea,select{min-width:0;max-width:100%;}
.card,.price-card,.kit-card,.tool-card,.auth-card{min-width:0;overflow-wrap:anywhere;}

/* ---------- landing page layout ---------- */
.landing-hero{padding-top:88px;padding-bottom:60px;display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:40px;align-items:center;}
.landing-hero-copy,.landing-hero-visual{min-width:0;}
.landing-hero-visual{position:relative;height:340px;display:flex;align-items:center;justify-content:center;isolation:isolate;}
.landing-card-shadow,.landing-demo-card{position:absolute;width:270px;height:180px;border-radius:16px;}
.landing-card-shadow{box-shadow:var(--shadow);border:1px solid var(--paper-3);}
.landing-card-shadow-left{background:var(--white);transform:rotate(-8deg) translate(-70px,10px);}
.landing-card-shadow-right{background:var(--paper-2);transform:rotate(4deg) translate(60px,30px);}
.landing-demo-card{transform-style:preserve-3d;transition:transform .6s cubic-bezier(.4,.2,.2,1);cursor:pointer;transform:rotate(-2deg) translate(-6px,-30px);}
.landing-steps-grid,.landing-benefits-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));}
.landing-steps-grid{gap:28px;}
.landing-benefits-grid{gap:20px;}
.landing-steps-grid>*,.landing-benefits-grid>*{min-width:0;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:999px;font-weight:600;font-size:0.95rem;
  transition:transform .15s ease, box-shadow .15s ease;white-space:nowrap;border:none;
  text-decoration:none;
}
.btn-primary{background:var(--navy);color:var(--paper);box-shadow:0 4px 0 var(--navy-3);}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 0 var(--navy-3);}
.btn-primary:active{transform:translateY(1px);box-shadow:0 2px 0 var(--navy-3);}
.btn-ghost{background:transparent;border:1.5px solid var(--navy);color:var(--navy);}
.btn-ghost:hover{background:var(--navy);color:var(--paper);}
.btn-highlight{background:var(--highlighter);color:var(--navy);box-shadow:0 4px 0 #d9b636;}
.btn-highlight:hover{transform:translateY(-2px);}
.btn-danger{background:#FFF0EF;color:#B84A45;border:1px solid var(--coral);}
.btn-danger:hover{background:var(--coral);color:#fff;}
.btn-sm{padding:9px 16px;font-size:0.85rem;}
.btn-full{width:100%;}
.btn:disabled{opacity:0.5;cursor:not-allowed;transform:none !important;}

/* ---------- nav ---------- */
nav.site-nav{position:sticky;top:0;z-index:50;background:rgba(245,245,240,0.9);backdrop-filter:blur(10px);border-bottom:1px solid var(--paper-3);}
.nav-inner{max-width:1160px;margin:0 auto;padding:16px 28px;display:flex;align-items:center;justify-content:space-between;gap:20px;}
.logo{display:flex;align-items:center;gap:10px;font-family:'Fraunces',serif;font-weight:700;font-size:1.25rem;text-decoration:none;color:var(--ink);}
.logo-mark{width:26px;height:26px;background:var(--navy);border-radius:6px;transform:rotate(-6deg);box-shadow:4px 4px 0 var(--highlighter);flex-shrink:0;}
.nav-links{display:flex;align-items:center;gap:16px;font-size:0.9rem;}
.nav-links a{text-decoration:none;color:var(--ink-soft);transition:color .15s;}
.nav-links a:hover{color:var(--navy);}
.nav-mobile-toggle{display:none;background:none;border:none;font-size:1.4rem;}
.announcement{background:var(--navy);color:var(--paper);text-align:center;font-size:0.85rem;padding:9px 20px;}
.announcement a{text-decoration:underline;}

/* ---------- flash messages ---------- */
.flash-stack{position:fixed;top:80px;right:20px;z-index:200;display:flex;flex-direction:column;gap:10px;max-width:360px;}
.flash-msg{padding:14px 18px;border-radius:12px;font-size:0.9rem;box-shadow:var(--shadow);animation:slidein .2s ease;}
.flash-success{background:#E6F4EC;color:#2c6248;border:1px solid var(--sage);}
.flash-error{background:#FFF0EF;color:#B84A45;border:1px solid var(--coral);}
.flash-info{background:var(--paper-2);color:var(--ink);border:1px solid var(--paper-3);}
@keyframes slidein{from{transform:translateX(30px);opacity:0;}to{transform:translateX(0);opacity:1;}}

/* ---------- footer ---------- */
footer.site-footer{background:var(--navy);color:#B7BCDA;padding:50px 0 30px;margin-top:60px;}
.footer-inner{display:flex;justify-content:space-between;align-items:flex-start;flex-wrap:wrap;gap:30px;}
.footer-inner .logo{color:var(--paper);}
.footer-brand p{margin-top:14px;max-width:280px;font-size:.9rem;}
.footer-links{display:flex;gap:40px;flex-wrap:wrap;}
.footer-col h5{font-size:0.8rem;text-transform:uppercase;letter-spacing:0.06em;color:#8b90b3;margin-bottom:12px;}
.footer-col a{display:block;color:#B7BCDA;text-decoration:none;font-size:0.9rem;margin-bottom:8px;}
.footer-col a:hover{color:var(--highlighter);}
footer .fine{font-size:0.8rem;margin-top:30px;color:#7c82a8;border-top:1px solid var(--navy-3);padding-top:20px;}
footer .fine a{color:inherit;text-underline-offset:3px;}

/* ---------- generic cards / sections ---------- */
section{padding:80px 0;}
.section-head{max-width:600px;margin-bottom:48px;}
.section-head h2{font-size:2.1rem;margin-bottom:12px;}
.section-head p{color:var(--ink-soft);font-size:1.05rem;}
.card{background:var(--white);border-radius:var(--radius);box-shadow:var(--shadow);border:1px solid var(--paper-3);padding:28px;}

/* ---------- auth forms ---------- */
.auth-shell{min-height:calc(100vh - 200px);display:flex;align-items:center;justify-content:center;padding:60px 20px;}
.auth-card{background:var(--white);border-radius:20px;box-shadow:var(--shadow);padding:44px;max-width:440px;width:100%;border:1px solid var(--paper-3);}
.auth-card h1{font-size:1.7rem;margin-bottom:8px;}
.auth-card .sub{color:var(--ink-soft);font-size:0.92rem;margin-bottom:28px;}
.field{margin-bottom:18px;}
.field label{display:block;font-size:0.85rem;font-weight:600;margin-bottom:7px;color:var(--ink);}
.field input[type=text], .field input[type=email], .field input[type=password], .field input[type=url], .field input[type=number], .field input[type=date], .field textarea, .field select{
  width:100%;padding:12px 14px;border:1.5px solid var(--paper-3);border-radius:10px;font-family:inherit;font-size:0.95rem;background:var(--paper);color:var(--ink);
}
.field input:focus, .field textarea:focus, .field select:focus{outline:2px solid var(--navy);outline-offset:1px;border-color:var(--navy);}
.field textarea{resize:vertical;min-height:120px;}
.field .checkbox-row{display:flex;align-items:center;gap:8px;font-size:0.88rem;color:var(--ink-soft);}
.field .checkbox-row input{width:auto;}
.field-error{color:#B84A45;font-size:0.8rem;margin-top:6px;}
.form-foot{text-align:center;font-size:0.9rem;color:var(--ink-soft);margin-top:20px;}
.form-foot a{color:var(--navy);font-weight:600;text-decoration:none;}
.form-foot a:hover{text-decoration:underline;}
hr.divider{border:none;border-top:1px solid var(--paper-3);margin:26px 0;}

/* ---------- pricing ---------- */
.pricing-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.price-card{background:var(--white);border-radius:20px;padding:36px 30px;border:1.5px solid var(--paper-3);display:flex;flex-direction:column;}
.price-card.featured{background:var(--navy);color:var(--paper);border-color:var(--navy);position:relative;transform:scale(1.03);}
.price-card.featured .badge{position:absolute;top:-14px;left:50%;transform:translateX(-50%);background:var(--highlighter);color:var(--navy);font-size:0.72rem;font-weight:700;padding:6px 14px;border-radius:999px;text-transform:uppercase;}
.price-card h3{font-size:1.3rem;margin-bottom:6px;}
.price-card .price{font-family:'Fraunces',serif;font-size:2.2rem;margin:14px 0 4px;}
.price-card .desc{font-size:0.9rem;color:var(--ink-soft);margin-bottom:22px;}
.price-card.featured .desc{color:#B7BCDA;}
.price-card ul{list-style:none;padding:0;margin:0 0 26px;display:flex;flex-direction:column;gap:11px;flex:1;}
.price-card li{font-size:0.9rem;display:flex;gap:10px;align-items:flex-start;}
.price-card li:before{content:"✓";color:var(--sage);font-weight:700;}
.price-card.featured li:before{color:var(--highlighter);}

/* ---------- dashboard shell ---------- */
.app-shell{min-height:calc(100vh - 76px);}
.app-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:32px;flex-wrap:wrap;gap:16px;}
.app-header h1{font-size:1.9rem;}
.stat-row{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-bottom:36px;}
.stat-box{background:var(--white);border-radius:var(--radius);padding:22px;border:1px solid var(--paper-3);}
.stat-box .num{font-family:'Fraunces',serif;font-size:1.9rem;}
.stat-box .lbl{font-size:0.82rem;color:var(--ink-soft);margin-top:4px;}
.kit-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}
.kit-card{background:var(--white);border-radius:var(--radius);padding:22px;border:1px solid var(--paper-3);text-decoration:none;color:var(--ink);display:block;transition:box-shadow .15s, transform .15s;}
.kit-card:hover{box-shadow:var(--shadow);transform:translateY(-2px);}
.kit-card .tag{font-size:0.72rem;text-transform:uppercase;color:var(--ink-soft);letter-spacing:0.05em;margin-bottom:8px;}
.kit-card h4{font-size:1.05rem;margin-bottom:6px;}
.kit-card .meta{font-size:0.82rem;color:var(--ink-soft);}
.learning-overview{display:grid;grid-template-columns:1.15fr 1fr .8fr;gap:18px;margin-bottom:38px;align-items:stretch;}
.due-card,.learning-card{border-radius:18px;padding:26px;border:1px solid var(--paper-3);box-shadow:0 12px 28px rgba(27,35,64,.08);}
.due-card{background:var(--navy);color:var(--paper);display:flex;flex-direction:column;align-items:flex-start;}
.learning-card{background:var(--white);}
.learning-kicker{text-transform:uppercase;letter-spacing:.09em;font-size:.7rem;font-weight:700;color:var(--ink-soft);margin-bottom:8px;}
.due-card .learning-kicker{color:var(--highlighter-2);}
.due-number{font-family:'Fraunces',serif;font-size:1.7rem;font-weight:600;margin-bottom:15px;}
.due-breakdown{display:grid;gap:6px;width:100%;margin-bottom:12px;}
.due-breakdown span{display:flex;justify-content:space-between;gap:16px;font-size:.83rem;color:#D6D9E8;}
.due-breakdown strong{font-weight:500;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.due-breakdown b{color:var(--paper);}
.due-time,.due-empty{font-size:.82rem;color:#B7BCDA;margin:auto 0 18px;}
.learning-card h3{font-size:1.12rem;margin-bottom:7px;}
.learning-card p{font-size:.84rem;color:var(--ink-soft);margin-bottom:15px;}
.learning-card>a{font-size:.84rem;font-weight:600;color:var(--navy);}
.exam-countdown{font-family:'Fraunces',serif;font-size:1.35rem;margin:9px 0 14px;}
.readiness-row{display:flex;justify-content:space-between;font-size:.78rem;color:var(--ink-soft);margin-bottom:6px;}
.mastery-track{height:7px;background:var(--paper-3);border-radius:999px;overflow:hidden;}
.mastery-track>span{display:block;height:100%;border-radius:inherit;background:linear-gradient(90deg,var(--coral),var(--highlighter),var(--sage));}
.exam-overview-card .mastery-track{margin-bottom:15px;}
.mastery-overview-card{display:flex;flex-direction:column;align-items:flex-start;}
.mastery-ring,.readiness-gauge{--value:calc(var(--mastery) * 1%);width:84px;height:84px;border-radius:50%;display:grid;place-items:center;background:conic-gradient(var(--sage) var(--value),var(--paper-3) 0);position:relative;margin:1px 0 14px;}
.mastery-ring:before,.readiness-gauge:before{content:"";position:absolute;inset:8px;background:var(--white);border-radius:50%;}
.mastery-ring span,.readiness-gauge span{position:relative;z-index:1;font-family:'Fraunces',serif;font-size:1.25rem;font-weight:600;}
.empty-state{text-align:center;padding:60px 20px;color:var(--ink-soft);}
.empty-state h3{color:var(--ink);margin-bottom:8px;}

/* ---------- study tool ---------- */
.tool-card{background:var(--white);border-radius:20px;box-shadow:var(--shadow);padding:40px;border:1px solid var(--paper-3);}
.tabs{display:flex;gap:8px;margin-bottom:28px;flex-wrap:wrap;}
.tab{padding:10px 18px;border-radius:999px;font-weight:600;font-size:0.9rem;background:var(--paper-2);color:var(--ink-soft);transition:all .15s;border:none;}
.tab.active{background:var(--navy);color:var(--paper);}
.usage-pill{margin-left:auto;font-size:0.82rem;color:var(--ink-soft);display:flex;align-items:center;gap:8px;background:var(--paper);padding:8px 14px;border-radius:999px;border:1px solid var(--paper-3);}
.plan-badge{background:var(--highlighter);color:var(--navy);font-weight:700;padding:2px 8px;border-radius:6px;font-size:0.72rem;text-transform:uppercase;}
.pane{display:none;}
.pane.active{display:block;}
.dropzone{border:2px dashed var(--paper-3);border-radius:var(--radius);padding:48px 24px;text-align:center;transition:all .15s;cursor:pointer;background:var(--paper);}
.dropzone.dragover,.dropzone:hover{border-color:var(--navy);background:var(--paper-2);}
.dropzone .ico{font-size:2.2rem;margin-bottom:12px;}
.dropzone .main-txt{font-weight:600;margin-bottom:6px;}
.dropzone .sub-txt{font-size:0.85rem;color:var(--ink-soft);}
.file-preview{display:flex;align-items:center;gap:14px;padding:16px;background:var(--paper);border-radius:var(--radius);border:1px solid var(--paper-3);margin-top:16px;}
.file-preview img{width:56px;height:56px;object-fit:cover;border-radius:8px;}
.file-preview .icon-box{width:56px;height:56px;border-radius:8px;background:var(--navy);color:var(--paper);display:flex;align-items:center;justify-content:center;font-size:1.4rem;}
.file-preview .meta{flex:1;}
.file-preview .meta .name{font-weight:600;font-size:0.9rem;word-break:break-all;}
.file-preview .meta .size{font-size:0.8rem;color:var(--ink-soft);}
.hint-txt{font-size:0.82rem;color:var(--ink-soft);}
.generate-row{display:flex;align-items:center;gap:16px;margin-top:24px;flex-wrap:wrap;}

.generation-options{
  margin-top:28px;
  padding:22px;
  border:1px solid var(--paper-3);
  border-radius:14px;
  background:var(--paper);
}

.generation-options-heading{
  margin-bottom:18px;
}

.generation-options-heading h3{
  font-size:1.05rem;
  margin-bottom:4px;
}

.generation-options-heading p{
  font-size:.86rem;
  color:var(--ink-soft);
}

.generation-options-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:18px;
}

.generation-options-grid .field{
  margin-bottom:0;
}

.generation-options-grid .hint-txt{
  margin-top:7px;
  line-height:1.4;
}

.generation-upgrade-link{
  display:inline-block;
  margin-top:18px;
  font-size:.84rem;
  font-weight:600;
  color:var(--navy);
}

.loading-state{display:none;padding:50px 0;text-align:center;}
.loading-state.active{display:block;}
.spinner{width:34px;height:34px;border-radius:50%;border:3px solid var(--paper-3);border-top-color:var(--navy);animation:spin .8s linear infinite;margin:0 auto 20px;}
@keyframes spin{to{transform:rotate(360deg);}}
.loading-stage{font-family:'Fraunces',serif;font-size:1.15rem;color:var(--ink-soft);transition:opacity .2s;}

/* ---------- study kit view ---------- */
.kit-hero{display:flex;justify-content:space-between;align-items:flex-start;gap:20px;margin-bottom:30px;flex-wrap:wrap;}
.kit-hero .kicker{font-size:0.8rem;text-transform:uppercase;color:var(--ink-soft);letter-spacing:0.06em;margin-bottom:8px;}
.kit-hero h1{font-size:2rem;}
.kit-actions{display:flex;gap:10px;}
.study-tabs{display:flex;gap:6px;border-bottom:2px solid var(--paper-3);margin-bottom:32px;overflow-x:auto;}
.study-tab{padding:12px 18px;font-weight:600;font-size:0.92rem;color:var(--ink-soft);border-bottom:2.5px solid transparent;margin-bottom:-2px;white-space:nowrap;background:none;border-top:none;border-left:none;border-right:none;}
.study-tab.active{color:var(--navy);border-bottom-color:var(--highlighter);}
.study-pane{display:none;}
.study-pane.active{display:block;}
.study-focus-text{color:var(--ink-soft);white-space:pre-line;}
.study-summary-text{
  color:var(--ink-soft);
  white-space:pre-line;
}

.manual-flashcard-form{
  max-width:680px;
  margin:28px auto 0;
  padding:18px 20px;
  border:1px solid var(--paper-3);
  border-radius:14px;
  background:var(--white);
}

.manual-flashcard-form summary{
  cursor:pointer;
  font-weight:600;
  color:var(--navy);
}

.manual-flashcard-form form{
  margin-top:20px;
}

.manual-flashcard-form textarea{
  min-height:90px;
}

.manual-flashcard-upgrade{
  max-width:680px;
  margin:28px auto 0;
  padding:16px 20px;
  border:1px solid var(--paper-3);
  border-radius:14px;
  background:var(--paper-2);
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:14px;
  font-size:.86rem;
  color:var(--ink-soft);
}

.manual-flashcard-upgrade a{
  font-weight:600;
  color:var(--navy);
  white-space:nowrap;
}

.summary-block{background:var(--white);border-radius:var(--radius);padding:26px;margin-bottom:28px;border-left:4px solid var(--highlighter);box-shadow:var(--shadow);}
.summary-block h4{font-family:'Fraunces',serif;font-size:1.1rem;margin-bottom:10px;}
.chips{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:10px;}
.chip{background:var(--navy);color:var(--paper);padding:8px 16px;border-radius:999px;font-size:0.85rem;font-weight:500;}
.def-list{display:flex;flex-direction:column;gap:14px;}
.def-item{background:var(--white);padding:18px 20px;border-radius:12px;border:1px solid var(--paper-3);}
.def-item .term{font-weight:700;margin-bottom:4px;}
.def-item .definition{color:var(--ink-soft);font-size:0.92rem;}
.fact-list{list-style:none;padding:0;display:flex;flex-direction:column;gap:10px;}
.fact-list li{background:var(--white);padding:14px 18px;border-radius:10px;border:1px solid var(--paper-3);font-size:0.92rem;position:relative;padding-left:38px;}
.fact-list li:before{content:"★";position:absolute;left:14px;color:var(--highlighter);}
.explain-item{background:var(--paper-2);padding:20px;border-radius:12px;margin-bottom:14px;}
.explain-item .concept{font-weight:700;margin-bottom:6px;}

/* ---------- flashcard deck ---------- */
.deck-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px;flex-wrap:wrap;gap:10px;}
.deck-stats{display:flex;gap:14px;font-size:0.85rem;color:var(--ink-soft);}
.deck-stats .know{color:var(--sage);font-weight:600;}
.deck-stats .review{color:var(--coral);font-weight:600;}
.deck{display:flex;flex-direction:column;align-items:center;gap:20px;}
.card-stage{width:100%;max-width:480px;height:280px;perspective:1400px;}
.flash-card{width:100%;height:100%;position:relative;transform-style:preserve-3d;transition:transform .5s cubic-bezier(.4,.2,.2,1);cursor:pointer;}
.flash-card.flipped{transform:rotateY(180deg);}
.flash-face{position:absolute;inset:0;border-radius:18px;backface-visibility:hidden;padding:34px;display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;box-shadow:var(--shadow);border:1px solid var(--paper-3);}
.flash-face.front{background:var(--white);}
.flash-face.back{background:var(--navy);color:var(--paper);transform:rotateY(180deg);}
.flash-face .kicker{font-size:0.75rem;text-transform:uppercase;letter-spacing:0.08em;color:var(--ink-soft);margin-bottom:16px;}
.flash-face.back .kicker{color:#B7BCDA;}
.flash-face .content{font-family:'Fraunces',serif;font-size:1.25rem;font-weight:500;line-height:1.35;}
.flash-face.back .content{font-family:'Space Grotesk',sans-serif;font-size:1.02rem;font-weight:400;}
.deck-controls{display:flex;align-items:center;gap:14px;}
.deck-controls button{width:40px;height:40px;border-radius:50%;background:var(--paper-2);border:none;display:flex;align-items:center;justify-content:center;font-size:1.1rem;}
.deck-controls button:hover{background:var(--paper-3);}
.progress-txt{font-size:0.9rem;color:var(--ink-soft);min-width:60px;text-align:center;}
.judge-row{display:flex;gap:12px;}
.judge-btn{padding:10px 20px;border-radius:999px;font-weight:600;font-size:0.88rem;border:none;}
.judge-btn.know{background:#E6F4EC;color:var(--sage);}
.judge-btn.review{background:#FFEEEC;color:#C0524B;}
.deck-tools{display:flex;gap:10px;margin-top:6px;}
.srs-rating-panel{width:min(100%,520px);margin:16px auto 0;text-align:center;animation:srsReveal .18s ease-out;}
.srs-rating-panel[hidden]{display:none;}
.srs-rating-panel>p{font-size:.72rem;font-weight:600;color:var(--ink-soft);margin-bottom:7px;}
.srs-rating-row{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:3px;padding:4px;border:1px solid var(--paper-3);border-radius:999px;background:var(--paper-2);}
.srs-btn{min-width:0;border:0;border-radius:999px;padding:8px 10px;background:transparent;color:var(--ink-soft);display:flex;align-items:center;justify-content:center;font-family:inherit;transition:color .15s,background .15s,box-shadow .15s;}
.srs-btn:hover,.srs-btn:focus-visible{color:var(--ink);background:var(--white);box-shadow:0 3px 10px rgba(27,35,64,.08);transform:none;}
.srs-btn:disabled{opacity:.55;cursor:wait;transform:none;}
.srs-btn strong{font:600 .73rem 'Space Grotesk',sans-serif;white-space:nowrap;}
.srs-btn.again:hover{color:#B84A45;}.srs-btn.good:hover,.srs-btn.easy:hover{color:var(--sage);}
@keyframes srsReveal{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:none}}

/* ---------- learning system ---------- */
.learning-page{padding-top:48px;padding-bottom:80px;max-width:1120px;}
.learning-page-head{display:flex;justify-content:space-between;align-items:flex-start;gap:24px;margin-bottom:32px;}
.learning-page-head h1{font-size:2.15rem;margin-bottom:7px;}.learning-page-head p{color:var(--ink-soft);max-width:650px;}
.back-link{display:inline-block;color:var(--ink-soft);font-size:.82rem;margin-bottom:18px;}
.learning-panel{background:var(--white);border:1px solid var(--paper-3);border-radius:18px;padding:28px;box-shadow:var(--shadow);}
.learning-panel h2{font-size:1.35rem;margin-bottom:20px;}
.review-session-shell{max-width:720px;margin:0 auto;background:var(--white);border:1px solid var(--paper-3);border-radius:20px;padding:28px;box-shadow:var(--shadow);}
.review-session-progress{display:flex;justify-content:space-between;gap:18px;color:var(--ink-soft);font-size:.8rem;margin-bottom:8px;}
.review-progress-track{height:6px;background:var(--paper-3);border-radius:99px;overflow:hidden;margin-bottom:30px;}.review-progress-track span{display:block;height:100%;background:var(--highlighter);transition:width .25s;}
.review-card-stage{margin:0 auto 24px;}.review-card-stage small{margin-top:18px;color:var(--ink-soft);font-family:'Space Grotesk',sans-serif;font-size:.72rem;}
.review-ratings{margin:0 auto;opacity:.45;transition:opacity .2s;}.review-ratings.ready{opacity:1;}.review-hint{text-align:center;color:var(--ink-soft);font-size:.8rem;margin-top:16px;}
.review-complete-card{text-align:center;padding:50px 24px;}.review-complete-card h2{font-size:1.8rem;margin-bottom:8px;}.review-complete-card p{color:var(--ink-soft);max-width:500px;margin:0 auto 22px;}.complete-check{width:58px;height:58px;border-radius:50%;display:grid;place-items:center;background:#E6F4EC;color:var(--sage);font-size:1.7rem;font-weight:700;margin:0 auto 18px;}
.exam-layout{display:grid;grid-template-columns:1fr 1.05fr;gap:26px;align-items:start;}.exam-form-row{display:grid;grid-template-columns:1fr 1fr;gap:14px;}.kit-picker{border:0;padding:0;margin:0 0 22px;}.kit-picker legend{font-size:.85rem;font-weight:600;margin-bottom:9px;}.kit-picker label{display:flex;align-items:flex-start;gap:11px;padding:12px;border:1px solid var(--paper-3);border-radius:10px;margin-bottom:8px;cursor:pointer;}.kit-picker label:has(input:checked){border-color:var(--navy);background:var(--paper);}.kit-picker input{margin-top:4px;}.kit-picker span{display:grid;gap:2px;}.kit-picker small{color:var(--ink-soft);}.section-mini-title{font-size:1.2rem;margin-bottom:15px;}.exam-list{display:grid;gap:12px;}.exam-list-card{display:flex;justify-content:space-between;align-items:center;gap:18px;background:var(--white);border:1px solid var(--paper-3);border-radius:14px;padding:19px;text-decoration:none;color:var(--ink);}.exam-list-card:hover{box-shadow:var(--shadow);}.exam-list-card h3{font-size:1.05rem;margin:7px 0 3px;}.exam-list-card p{color:var(--ink-soft);font-size:.8rem;}.exam-date-chip{font-size:.68rem;text-transform:uppercase;font-weight:700;color:var(--sage);}.exam-readiness{text-align:center;display:grid;}.exam-readiness strong{font-family:'Fraunces',serif;font-size:1.35rem;}.exam-readiness span{font-size:.68rem;color:var(--ink-soft);}.learning-empty{text-align:center;background:var(--white);border:1px dashed var(--paper-3);border-radius:16px;padding:45px 24px;}.learning-empty h2,.learning-empty h3{margin-bottom:7px;}.learning-empty p{color:var(--ink-soft);margin-bottom:18px;}
.exam-hero-card{background:var(--navy);color:var(--paper);border-radius:22px;padding:32px 38px;display:flex;justify-content:space-between;align-items:center;margin-bottom:26px;box-shadow:0 18px 38px rgba(27,35,64,.18);}.exam-hero-label{color:var(--highlighter);text-transform:uppercase;font-size:.72rem;font-weight:700;letter-spacing:.08em;}.exam-hero-card h2{font-size:2rem;margin:8px 0;}.exam-hero-card p{color:#D6D9E8;}.readiness-gauge{width:112px;height:112px;background:conic-gradient(var(--highlighter) var(--value),var(--navy-3) 0);margin:0;flex:0 0 auto;}.readiness-gauge:before{background:var(--navy);inset:10px;}.readiness-gauge span{color:var(--paper);font-size:1.45rem;}.exam-detail-grid{display:grid;grid-template-columns:1.35fr .65fr;gap:24px;align-items:start;}.panel-heading{display:flex;justify-content:space-between;gap:18px;align-items:flex-start;margin-bottom:16px;}.panel-heading h2{margin:0;}.panel-heading>span{font-size:.72rem;color:var(--ink-soft);}.agenda-list{display:grid;}.agenda-item{display:grid;grid-template-columns:70px 1fr auto;gap:14px;padding:14px 10px;border-bottom:1px solid var(--paper-3);font-size:.86rem;}.agenda-item time{font-weight:600;color:var(--ink-soft);}.agenda-item.today{background:#FFF8DA;border-radius:10px;border:0;padding:15px 12px;}.agenda-item b{color:var(--sage);font-size:.7rem;text-transform:uppercase;}.compact-mastery-list{display:grid;gap:18px;margin-bottom:24px;}.compact-mastery-list>div{display:grid;grid-template-columns:1fr auto;gap:6px;font-size:.82rem;}.compact-mastery-list .mastery-track{grid-column:1/-1;}
.mastery-ring.large{width:112px;height:112px;margin:0;}.mastery-table-card{background:var(--white);border:1px solid var(--paper-3);border-radius:18px;overflow:hidden;box-shadow:var(--shadow);}.mastery-table-head,.mastery-table-row{display:grid;grid-template-columns:minmax(210px,1.4fr) .65fr .65fr 1fr auto;gap:18px;align-items:center;padding:14px 20px;}.mastery-table-head{background:var(--paper-2);font-size:.7rem;text-transform:uppercase;color:var(--ink-soft);font-weight:700;}.mastery-table-row{border-top:1px solid var(--paper-3);font-size:.84rem;}.mastery-table-row>div:first-child{display:grid;gap:3px;}.mastery-table-row small{color:var(--ink-soft);}.row-mastery{display:grid;grid-template-columns:40px 1fr;gap:8px;align-items:center;}.weak-practice-intro{display:flex;align-items:center;gap:16px;background:var(--navy);color:var(--paper);padding:20px 24px;border-radius:16px;margin-bottom:30px;}.weak-practice-intro>div{display:grid;padding-right:22px;border-right:1px solid var(--navy-3);}.weak-practice-intro strong{font-family:'Fraunces',serif;font-size:1.5rem;}.weak-practice-intro span{font-size:.7rem;color:#B7BCDA;}.weak-practice-intro .btn{margin-left:0;}.weak-practice-intro .btn:first-of-type{margin-left:auto;}.weak-card-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-bottom:32px;}.weak-card-grid article,.missed-question{background:var(--white);border:1px solid var(--paper-3);border-radius:14px;padding:20px;}.weak-card-grid h3,.missed-question h3{font-size:1rem;margin-bottom:8px;}.weak-card-grid p,.missed-question p{font-size:.84rem;color:var(--ink-soft);}.missed-question{margin-bottom:12px;}
.topic-preview{display:flex;gap:5px;flex-wrap:wrap;margin-top:6px}.topic-preview span{font-size:.62rem;background:var(--paper-2);border-radius:999px;padding:3px 7px}.topic-mastery-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-bottom:30px}.topic-mastery-grid article{display:grid;grid-template-columns:1fr auto;gap:10px 16px;background:var(--white);border:1px solid var(--paper-3);border-radius:14px;padding:17px 19px}.topic-mastery-grid article>div:first-child{display:grid;gap:2px}.topic-mastery-grid article span{font-size:.68rem;color:var(--ink-soft)}.topic-mastery-grid article>b{font-family:'Fraunces',serif;font-size:1.15rem}.topic-mastery-grid .mastery-track{grid-column:1/-1}

/* ---------- quiz ---------- */
.typed-recall{max-width:620px;margin:0 auto 16px;background:var(--white);border:1px solid var(--paper-3);border-radius:12px;padding:13px}.typed-recall label{display:block;font-size:.72rem;font-weight:700;margin-bottom:7px}.typed-recall>div{display:flex;gap:8px}.typed-recall input{flex:1;min-width:0;border:1px solid var(--paper-3);border-radius:9px;padding:9px 11px;font:inherit}.typed-recall p{font-size:.72rem;margin-top:7px}.typed-recall p.correct{color:var(--sage)}.typed-recall p.incorrect{color:var(--coral)}.card-image-wrap{position:relative;width:min(100%,420px);margin:12px auto 0}.card-image-wrap img{display:block;max-height:230px;width:100%;object-fit:contain;border-radius:8px}.card-occlusion-mask{position:absolute;background:var(--navy);border:2px solid var(--highlighter);border-radius:5px;box-shadow:0 4px 12px rgba(0,0,0,.2)}.image-occlusion-fields[hidden],.typed-answer-field[hidden]{display:none}.occlusion-editor{position:relative;min-height:180px;border:1px dashed var(--paper-3);border-radius:12px;background:var(--paper-2);display:grid;place-items:center;overflow:hidden;margin-bottom:15px;touch-action:none}.occlusion-editor.ready{min-height:0}.occlusion-editor img{display:none;width:100%;max-height:360px;object-fit:contain}.occlusion-editor.ready img{display:block}.occlusion-editor em{font-size:.75rem;color:var(--ink-soft)}.occlusion-editor.ready em{display:none}.occlusion-editor span{display:none;position:absolute;background:rgba(27,35,64,.88);border:2px solid var(--highlighter);border-radius:4px}.occlusion-editor.ready span{display:block}

.kit-course-picker{display:flex;align-items:center;gap:9px;margin-bottom:16px;font-size:.75rem}.kit-course-picker label{font-weight:700}.kit-course-picker select{border:1px solid var(--paper-3);background:var(--white);border-radius:9px;padding:7px 10px;font:inherit}.kit-course-picker a{color:var(--ink-soft)}.course-layout{display:grid;grid-template-columns:1.5fr .7fr;gap:25px;align-items:start}.course-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.course-card{background:var(--white);border:1px solid var(--paper-3);border-radius:18px;padding:22px;display:grid;grid-template-columns:auto 1fr;gap:14px;color:var(--ink);text-decoration:none;box-shadow:0 8px 24px rgba(27,35,64,.06)}.course-card:hover{transform:translateY(-2px);box-shadow:var(--shadow)}.course-icon{font-size:2rem}.course-card h2{font-size:1.2rem;margin:3px 0 5px}.course-card p{font-size:.76rem;color:var(--ink-soft)}.course-card footer{grid-column:1/-1;border-top:1px solid var(--paper-3);padding-top:12px;display:flex;justify-content:space-between;font-size:.7rem;color:var(--ink-soft)}.course-card footer strong{color:var(--sage)}.course-create h2{margin-bottom:18px}.icon-picker{display:flex;gap:7px;flex-wrap:wrap}.icon-picker input{position:absolute;opacity:0}.icon-picker span{width:39px;height:39px;border:1px solid var(--paper-3);border-radius:10px;display:grid;place-items:center;cursor:pointer}.icon-picker input:checked+span{border-color:var(--navy);background:var(--paper-2)}.unfiled-note{font-size:.75rem;color:var(--ink-soft);margin-top:14px}.course-title-line{display:flex;gap:15px;align-items:center;margin-top:12px}.course-title-line>span{font-size:2.5rem}.course-hero{background:var(--navy);color:var(--paper);border-radius:18px;padding:23px 26px;display:flex;align-items:center;gap:32px;margin-bottom:20px}.course-hero>div{display:grid}.course-hero span{font-size:.68rem;color:#B7BCDA;text-transform:uppercase}.course-hero strong{font-family:'Fraunces',serif;font-size:1.55rem}.course-hero .btn{margin-left:auto}.add-kit-bar{display:flex;gap:10px;margin:18px 0}.add-kit-bar select{flex:1;border:1px solid var(--paper-3);border-radius:10px;background:var(--white);padding:10px 12px;font:inherit}.course-kit-list{display:grid;gap:11px}.course-kit-list article{background:var(--white);border:1px solid var(--paper-3);border-radius:14px;padding:17px 19px;display:flex;align-items:center;justify-content:space-between;gap:16px}.course-kit-list article>a{color:var(--ink);text-decoration:none;flex:1}.course-kit-list h2{font-size:1.05rem;margin:3px 0}.course-kit-list p{font-size:.72rem;color:var(--ink-soft)}

.tutor-backdrop{position:fixed;inset:0;background:rgba(15,21,43,.38);z-index:190;opacity:0;pointer-events:none;transition:opacity .2s}.tutor-backdrop.open{opacity:1;pointer-events:auto}.tutor-drawer{position:fixed;z-index:200;top:0;right:0;width:min(470px,100%);height:100dvh;background:var(--paper);box-shadow:-18px 0 50px rgba(27,35,64,.2);padding:24px;display:flex;flex-direction:column;transform:translateX(105%);transition:transform .25s ease}.tutor-drawer.open{transform:none}.tutor-head{display:flex;justify-content:space-between;align-items:flex-start;gap:16px}.tutor-head h2{font-size:1.55rem}.tutor-head>button{border:0;background:var(--paper-2);width:36px;height:36px;border-radius:50%;font-size:1.4rem}.tutor-trust{font-size:.76rem;color:var(--ink-soft);margin:10px 0 15px}.tutor-actions{display:flex;gap:7px;overflow-x:auto;padding-bottom:10px}.tutor-actions button{white-space:nowrap;border:1px solid var(--paper-3);border-radius:999px;background:var(--white);padding:7px 10px;font-family:inherit;font-size:.7rem}.tutor-thread{flex:1;min-height:180px;overflow-y:auto;display:flex;flex-direction:column;gap:10px;padding:12px 2px}.tutor-welcome{text-align:center;color:var(--ink-soft);font-size:.8rem;margin:auto;padding:24px}.tutor-msg{max-width:88%;border-radius:14px;padding:11px 13px;font-size:.82rem;white-space:pre-wrap}.tutor-msg>span{display:block;font-size:.62rem;text-transform:uppercase;font-weight:700;margin-bottom:4px}.tutor-msg p{white-space:pre-wrap}.tutor-msg.user{align-self:flex-end;background:var(--navy);color:var(--paper);border-bottom-right-radius:4px}.tutor-msg.assistant{align-self:flex-start;background:var(--white);border:1px solid var(--paper-3);border-bottom-left-radius:4px}.tutor-msg.pending{color:var(--ink-soft);font-style:italic}.tutor-compose{border-top:1px solid var(--paper-3);padding-top:12px}.tutor-compose textarea{width:100%;resize:none;border:1px solid var(--paper-3);background:var(--white);border-radius:12px;padding:12px;font:inherit}.tutor-compose>div{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-top:8px}.tutor-compose span{font-size:.65rem;color:var(--ink-soft)}

.quiz-q{background:var(--white);border-radius:var(--radius);padding:26px;margin-bottom:18px;border:1px solid var(--paper-3);}
.quiz-q h4{font-size:1.05rem;margin-bottom:16px;}
.quiz-options{display:flex;flex-direction:column;gap:10px;}
.quiz-option{display:flex;align-items:center;gap:12px;padding:12px 16px;border-radius:10px;border:1.5px solid var(--paper-3);cursor:pointer;font-size:0.92rem;transition:all .12s;}
.quiz-option:hover{border-color:var(--navy);}
.quiz-option.selected{border-color:var(--navy);background:var(--paper-2);}
.quiz-option.correct{border-color:var(--sage);background:#E6F4EC;}
.quiz-option.incorrect{border-color:var(--coral);background:#FFF0EF;}
.quiz-explain{margin-top:12px;font-size:0.86rem;color:var(--ink-soft);background:var(--paper);padding:12px 14px;border-radius:8px;display:none;}
.quiz-explain.show{display:block;}
.quiz-score-banner{background:var(--navy);color:var(--paper);border-radius:var(--radius);padding:30px;text-align:center;margin-bottom:28px;}
.quiz-score-banner .score-num{font-family:'Fraunces',serif;font-size:2.6rem;color:var(--highlighter);}

/* ---------- admin ---------- */
.admin-shell{display:flex;min-height:calc(100vh - 0px);}
.admin-sidebar{width:240px;background:var(--navy);color:var(--paper);padding:24px 16px;flex-shrink:0;position:sticky;top:0;height:100vh;overflow-y:auto;}
.admin-sidebar .logo{color:var(--paper);margin-bottom:30px;padding:0 8px;}
.admin-nav a{display:flex;align-items:center;gap:10px;padding:11px 12px;border-radius:8px;color:#B7BCDA;text-decoration:none;font-size:0.9rem;margin-bottom:2px;}
.admin-nav a:hover{background:var(--navy-2);color:var(--paper);}
.admin-nav a.active{background:var(--navy-2);color:var(--highlighter);font-weight:600;}
.admin-main{flex:1;padding:36px 40px;max-width:1400px;}
.admin-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:28px;flex-wrap:wrap;gap:12px;}
.admin-top h1{font-size:1.7rem;}
.admin-stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:32px;}
.admin-stat{background:var(--white);border-radius:12px;padding:20px;border:1px solid var(--paper-3);}
.admin-stat .num{font-family:'Fraunces',serif;font-size:1.7rem;}
.admin-stat .lbl{font-size:0.78rem;color:var(--ink-soft);margin-top:4px;}
.admin-table{width:100%;border-collapse:collapse;background:var(--white);border-radius:12px;overflow:hidden;border:1px solid var(--paper-3);}
.admin-table th{text-align:left;font-size:0.75rem;text-transform:uppercase;letter-spacing:0.04em;color:var(--ink-soft);padding:12px 16px;background:var(--paper-2);border-bottom:1px solid var(--paper-3);}
.admin-table td{padding:12px 16px;border-bottom:1px solid var(--paper-3);font-size:0.88rem;}
.admin-table tr:last-child td{border-bottom:none;}
.status-badge{padding:3px 10px;border-radius:999px;font-size:0.75rem;font-weight:600;}
.status-active{background:#E6F4EC;color:var(--sage);}
.status-disabled{background:#FFF0EF;color:#B84A45;}
.mini-chart{display:flex;align-items:flex-end;gap:4px;height:80px;}
.mini-chart .bar{flex:1;background:var(--highlighter);border-radius:3px 3px 0 0;min-height:2px;}
.admin-card{background:var(--white);border-radius:12px;border:1px solid var(--paper-3);padding:24px;margin-bottom:24px;}
.admin-filters{display:flex;gap:10px;margin-bottom:20px;flex-wrap:wrap;}
.admin-filters input, .admin-filters select{padding:9px 12px;border-radius:8px;border:1.5px solid var(--paper-3);font-family:inherit;font-size:0.88rem;}
.toolbar{display:flex;gap:10px;flex-wrap:wrap;}

/* ---------- toast ---------- */
.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%) translateY(20px);background:var(--navy);color:var(--paper);padding:14px 24px;border-radius:999px;font-size:0.9rem;font-weight:500;opacity:0;transition:all .25s;z-index:200;pointer-events:none;}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0);}

/* ---------- error / maintenance pages ---------- */
.error-shell{min-height:70vh;display:flex;align-items:center;justify-content:center;text-align:center;padding:40px 20px;}
.error-shell h1{font-size:3rem;margin-bottom:16px;}
.error-shell p{color:var(--ink-soft);margin-bottom:24px;max-width:420px;}

@media (max-width:640px){
  .generation-options-grid{
    grid-template-columns:1fr;
  }

  .generation-options{
    padding:18px;
  }

  .manual-flashcard-upgrade{
    align-items:flex-start;
    flex-direction:column;
  }
}

@media (max-width:900px){
  .stat-row,.pricing-grid,.kit-grid,.admin-stat-grid{grid-template-columns:1fr 1fr;}
  .learning-overview{grid-template-columns:1fr 1fr;}.due-card{grid-row:span 2;}.exam-layout,.exam-detail-grid{grid-template-columns:1fr;}.mastery-table-head{display:none;}.mastery-table-row{grid-template-columns:1.2fr .6fr .6fr 1fr;}.mastery-table-row>a{grid-column:1/-1;justify-self:start;}
  .course-layout{grid-template-columns:1fr}.course-create{grid-row:1}
  .admin-sidebar{position:fixed;left:-260px;transition:left .2s;z-index:100;}
  .admin-sidebar.open{left:0;}
  .admin-main{padding:24px 18px;}
}
@media (max-width:640px){
  .nav-links{position:fixed;top:68px;left:0;right:0;background:var(--paper);flex-direction:column;align-items:flex-start;padding:20px 28px;border-bottom:1px solid var(--paper-3);display:none;}
  .nav-links.open{display:flex;}
  .nav-mobile-toggle{display:block;}
  .stat-row,.pricing-grid,.kit-grid,.admin-stat-grid{grid-template-columns:1fr;}
  .price-card.featured{transform:none;}
  .footer-inner{flex-direction:column;}
  .learning-overview{grid-template-columns:1fr;}.due-card{grid-row:auto;}.learning-page{padding-top:30px;}.learning-page-head,.exam-hero-card{flex-direction:column;align-items:flex-start;}.exam-form-row{grid-template-columns:1fr;}.srs-rating-row{grid-template-columns:repeat(4,minmax(0,1fr));}.review-session-shell{padding:18px 14px;}.review-card-stage{height:260px;}.mastery-table-row{grid-template-columns:1fr 1fr;}.mastery-table-row>div:first-child,.row-mastery,.mastery-table-row>a{grid-column:1/-1;}.weak-card-grid,.topic-mastery-grid{grid-template-columns:1fr;}.weak-practice-intro{align-items:flex-start;flex-wrap:wrap;}.weak-practice-intro .btn{width:100%;margin:4px 0 0;}.agenda-item{grid-template-columns:58px 1fr;}.agenda-item b{grid-column:2;}.exam-hero-card{padding:26px;}.readiness-gauge{align-self:center;}
  .course-grid{grid-template-columns:1fr}.course-hero{align-items:flex-start;flex-wrap:wrap}.course-hero .btn{width:100%;margin-left:0}.add-kit-bar,.kit-course-picker{align-items:stretch;flex-direction:column}.course-kit-list article{align-items:flex-start}.tutor-drawer{padding:18px 15px}.typed-recall>div{flex-direction:column}
}
@media (prefers-reduced-motion: reduce){
  *{animation-duration:0.01ms !important;transition-duration:0.01ms !important;}
}

/* =====================================================================
   POLISH PASS — smoother motion, refined hover states, scroll reveal
   ===================================================================== */

/* Smoother, more premium easing on core interactive elements. These
   override the earlier, simpler transition rules further up the file. */
.btn{transition:transform .25s cubic-bezier(.16,1,.3,1), box-shadow .25s cubic-bezier(.16,1,.3,1), background-color .2s ease;}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 8px 0 var(--navy-3), 0 14px 24px rgba(27,35,64,0.18);}
.btn-ghost{transition:background-color .25s cubic-bezier(.16,1,.3,1), color .25s cubic-bezier(.16,1,.3,1), transform .25s cubic-bezier(.16,1,.3,1), box-shadow .25s cubic-bezier(.16,1,.3,1);}
.btn-ghost:hover{transform:translateY(-2px);box-shadow:0 6px 16px rgba(27,35,64,0.10);}
.btn-highlight{transition:transform .25s cubic-bezier(.16,1,.3,1), box-shadow .25s cubic-bezier(.16,1,.3,1);}
.btn-highlight:hover{box-shadow:0 8px 0 #d9b636, 0 14px 24px rgba(244,211,94,0.28);}

.card, .kit-card, .price-card, .stat-box, .step, .price-card.featured{
  transition:transform .35s cubic-bezier(.16,1,.3,1), box-shadow .35s cubic-bezier(.16,1,.3,1), border-color .25s ease;
}
.card:hover{transform:translateY(-4px);box-shadow:0 16px 36px rgba(27,35,64,0.14);}
.kit-card:hover{transform:translateY(-5px);box-shadow:0 18px 34px rgba(27,35,64,0.16);border-color:var(--paper-3);}
.step:hover{transform:translateY(-4px);}
.price-card:hover{transform:translateY(-5px);box-shadow:0 20px 40px rgba(27,35,64,0.12);}
.price-card.featured:hover{transform:scale(1.03) translateY(-5px);}
.stat-box:hover, .admin-stat:hover{transform:translateY(-3px);box-shadow:0 12px 24px rgba(27,35,64,0.10);}

.tab, .study-tab, .quiz-option{transition:all .22s cubic-bezier(.16,1,.3,1);}
.dropzone{transition:all .25s cubic-bezier(.16,1,.3,1);}
.dropzone:hover{transform:translateY(-2px);}

/* Nav gains a soft shadow once the page has scrolled — toggled by JS
   via the .scrolled class, see static/js/site.js */
nav.site-nav{transition:box-shadow .3s ease, background-color .3s ease;}
nav.site-nav.scrolled{box-shadow:0 4px 20px rgba(27,35,64,0.08);background:rgba(245,245,240,0.97);}

.language-picker{margin:0;display:flex;align-items:center;}
.language-picker select{
  appearance:none;background:var(--white);color:var(--ink);border:1px solid var(--paper-3);
  border-radius:999px;padding:8px 30px 8px 12px;font:600 .78rem 'Space Grotesk',sans-serif;
  cursor:pointer;background-image:linear-gradient(45deg,transparent 50%,var(--ink-soft) 50%),linear-gradient(135deg,var(--ink-soft) 50%,transparent 50%);
  background-position:calc(100% - 14px) 50%,calc(100% - 10px) 50%;background-size:4px 4px,4px 4px;background-repeat:no-repeat;
}
.language-picker select:hover,.language-picker select:focus{border-color:var(--navy);outline:none;}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;}


/* Mobile nav: smooth slide+fade instead of an instant show/hide */
.nav-links{transition:opacity .25s ease, transform .25s ease;}
@media (max-width:640px){
  .nav-links{
    opacity:0;transform:translateY(-8px);pointer-events:none;
    display:flex !important;
  }
  .nav-links.open{opacity:1;transform:translateY(0);pointer-events:auto;}
  .language-picker{width:100%;justify-content:center;margin-top:4px;}
  .language-picker select{width:100%;max-width:220px;}
}

/* Scroll-reveal: elements fade/slide up into view. JS adds .in-view when
   the element enters the viewport; falls back to visible-by-default if
   JS never runs (progressive enhancement, nothing ever hides permanently). */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .7s cubic-bezier(.16,1,.3,1), transform .7s cubic-bezier(.16,1,.3,1);}
.reveal.in-view{opacity:1;transform:translateY(0);}
.reveal-delay-1{transition-delay:.08s;}
.reveal-delay-2{transition-delay:.16s;}
.reveal-delay-3{transition-delay:.24s;}

/* Hero flip-card gets a slightly richer shadow + easing to feel less flat */
.hero .stack > div, header.hero > div:last-child > div{
  transition:transform .5s cubic-bezier(.16,1,.3,1), box-shadow .4s ease;
}

/* Focus rings feel smoother instead of snapping in */
:focus-visible{transition:outline-offset .15s ease;}

/* =====================================================================
   SUPPORT WIDGET
   ===================================================================== */
.support-widget{position:fixed;right:22px;bottom:22px;z-index:300;}

.support-fab{
  position:relative;width:58px;height:58px;border-radius:50%;
  background:var(--navy);color:var(--paper);
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 10px 24px rgba(27,35,64,0.28), 0 2px 6px rgba(27,35,64,0.2);
  transition:transform .3s cubic-bezier(.16,1,.3,1), box-shadow .3s cubic-bezier(.16,1,.3,1), background-color .25s ease;
  border:none;
}
.support-fab:hover{transform:translateY(-3px) scale(1.04);box-shadow:0 16px 32px rgba(27,35,64,0.32);}
.support-fab:active{transform:translateY(0) scale(0.97);}

.support-badge{
  position:absolute;top:-4px;right:-4px;min-width:20px;height:20px;padding:0 5px;
  background:var(--coral);color:#fff;border-radius:999px;
  font-size:0.7rem;font-weight:700;align-items:center;justify-content:center;
  border:2px solid var(--paper);
  animation:badgepop .4s cubic-bezier(.34,1.56,.64,1);
}
@keyframes badgepop{from{transform:scale(0);}to{transform:scale(1);}}

.support-panel{
  position:absolute;right:0;bottom:74px;width:340px;max-width:calc(100vw - 44px);
  background:var(--white);border-radius:20px;
  box-shadow:0 24px 60px rgba(27,35,64,0.24), 0 4px 12px rgba(27,35,64,0.1);
  border:1px solid var(--paper-3);
  opacity:0;transform:translateY(16px) scale(0.97);pointer-events:none;
  transition:opacity .25s cubic-bezier(.16,1,.3,1), transform .3s cubic-bezier(.16,1,.3,1);
  overflow:hidden;
  transform-origin:bottom right;
}
.support-panel.open{opacity:1;transform:translateY(0) scale(1);pointer-events:auto;}

.support-panel-head{
  background:var(--navy);color:var(--paper);padding:20px 22px;
}
.support-panel-title{font-family:'Fraunces',serif;font-size:1.15rem;font-weight:600;}
.support-panel-sub{font-size:0.8rem;color:#B7BCDA;margin-top:3px;}

.support-panel-body{padding:20px 22px;max-height:60vh;overflow-y:auto;}

.support-reply-banner{
  display:block;background:var(--highlighter);color:var(--navy);
  padding:11px 14px;border-radius:10px;font-size:0.82rem;font-weight:600;
  text-decoration:none;margin-bottom:16px;transition:transform .2s ease;
}
.support-reply-banner:hover{transform:translateY(-1px);}

.support-form{display:flex;flex-direction:column;gap:14px;}
.support-field label{display:block;font-size:0.78rem;font-weight:600;color:var(--ink-soft);margin-bottom:5px;}
.support-field input, .support-field textarea{
  width:100%;padding:10px 12px;border:1.5px solid var(--paper-3);border-radius:10px;
  font-family:inherit;font-size:0.88rem;background:var(--paper);color:var(--ink);
  transition:border-color .2s ease;resize:vertical;
}
.support-field input:focus, .support-field textarea:focus{outline:none;border-color:var(--navy);}
.support-error{background:#FFF0EF;color:#B84A45;padding:10px 12px;border-radius:8px;font-size:0.82rem;}

.support-success{text-align:center;padding:10px 0;}
.support-success-icon{
  width:44px;height:44px;border-radius:50%;background:#E6F4EC;color:var(--sage);
  display:flex;align-items:center;justify-content:center;font-size:1.3rem;font-weight:700;
  margin:0 auto 14px;animation:badgepop .4s cubic-bezier(.34,1.56,.64,1);
}
.support-success-title{font-family:'Fraunces',serif;font-size:1.1rem;margin-bottom:6px;}
.support-success-sub{font-size:0.85rem;color:var(--ink-soft);margin-bottom:14px;}
.support-success-link{font-size:0.85rem;font-weight:600;color:var(--navy);text-decoration:none;}
.support-success-link:hover{text-decoration:underline;}

.support-panel-foot{
  border-top:1px solid var(--paper-3);padding:12px 22px;text-align:center;
}
.support-panel-foot a{font-size:0.82rem;color:var(--ink-soft);text-decoration:none;font-weight:600;}
.support-panel-foot a:hover{color:var(--navy);}

@media (max-width:480px){
  .support-widget{right:16px;bottom:16px;}
  .support-panel{right:-6px;width:calc(100vw - 32px);}
}

/* =====================================================================
   SUPPORT TICKET PAGES (my tickets / ticket thread / admin views)
   ===================================================================== */
.ticket-list{display:flex;flex-direction:column;gap:12px;}
.ticket-row{
  display:flex;justify-content:space-between;align-items:center;gap:16px;
  background:var(--white);border:1px solid var(--paper-3);border-radius:12px;
  padding:16px 20px;text-decoration:none;color:var(--ink);
  transition:transform .2s cubic-bezier(.16,1,.3,1), box-shadow .2s cubic-bezier(.16,1,.3,1);
}
.ticket-row:hover{transform:translateX(2px);box-shadow:0 8px 20px rgba(27,35,64,0.08);}
.ticket-row .subject{font-weight:600;margin-bottom:4px;}
.ticket-row .meta{font-size:0.8rem;color:var(--ink-soft);}

.ticket-status{padding:4px 12px;border-radius:999px;font-size:0.74rem;font-weight:700;text-transform:uppercase;letter-spacing:0.03em;white-space:nowrap;}
.ticket-status-open{background:#FFF3D6;color:#9A6B0A;}
.ticket-status-pending{background:#E4EBFF;color:#3856C4;}
.ticket-status-resolved{background:#E6F4EC;color:var(--sage);}

.ticket-thread{display:flex;flex-direction:column;gap:16px;margin-bottom:28px;}
.ticket-msg{max-width:78%;padding:14px 18px;border-radius:16px;font-size:0.92rem;line-height:1.5;}
.ticket-msg.from-user{align-self:flex-end;background:var(--paper-2);color:var(--ink);border-bottom-right-radius:4px;}
.ticket-msg.from-admin{align-self:flex-start;background:var(--navy);color:var(--paper);border-bottom-left-radius:4px;}
.ticket-msg .msg-meta{font-size:0.72rem;opacity:0.65;margin-bottom:6px;font-weight:600;}

@media (max-width:640px){
  .ticket-msg{max-width:92%;}
}

/* ---------- checkout ---------- */
.checkout-shell{padding-top:48px;padding-bottom:80px;max-width:1040px;}
.checkout-back{display:inline-block;margin-bottom:24px;color:var(--ink-soft);font-size:.88rem;text-decoration:none;}
.checkout-back:hover{color:var(--navy);}
.checkout-grid{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(300px,.75fr);gap:28px;align-items:start;}
.checkout-main,.checkout-summary{background:var(--white);border:1px solid var(--paper-3);border-radius:20px;box-shadow:var(--shadow);padding:34px;}
.checkout-main h1{font-size:2rem;margin:5px 0 12px;}
.checkout-intro{color:var(--ink-soft);max-width:600px;margin-bottom:28px;}
.checkout-account{display:grid;grid-template-columns:1fr auto;gap:2px 18px;padding:18px;background:var(--paper);border-radius:12px;margin-bottom:24px;}
.checkout-account>span{grid-row:1/3;color:var(--ink-soft);font-size:.78rem;text-transform:uppercase;letter-spacing:.05em;align-self:center;}
.checkout-account strong,.checkout-account small{text-align:right;}
.checkout-account small{color:var(--ink-soft);}
.checkout-notice,.checkout-warning{padding:13px 15px;border-radius:10px;margin-bottom:20px;font-size:.9rem;}
.checkout-notice{background:#E6F4EC;color:var(--sage);}
.checkout-warning{background:#FFF3D6;color:#76530b;}
.checkout-confirm-form{border-top:1px solid var(--paper-3);padding-top:22px;}
.checkout-terms{display:flex;align-items:flex-start;gap:10px;font-size:.84rem;color:var(--ink-soft);margin-bottom:18px;cursor:pointer;}
.checkout-terms input{margin-top:4px;flex:0 0 auto;}
.checkout-terms a{color:var(--navy);font-weight:600;}
.checkout-setup-note{color:#B84A45;font-size:.8rem;margin-top:10px;text-align:center;}
.checkout-summary{position:sticky;top:24px;background:var(--navy);color:var(--paper);}
.checkout-summary .kicker{color:var(--highlighter-2);margin-top:8px;}
.checkout-summary h2{font-size:1.65rem;margin:5px 0;}
.checkout-price{font-family:'Fraunces',serif;font-size:2rem;font-weight:600;color:var(--highlighter);margin-bottom:12px;}
.checkout-summary>p{color:#C7CBE0;font-size:.9rem;}
.checkout-summary ul{list-style:none;padding:0;margin:22px 0;display:grid;gap:10px;}
.checkout-summary li::before{content:'✓';color:var(--highlighter);font-weight:700;margin-right:9px;}
.checkout-secure{border-top:1px solid var(--navy-3);padding-top:18px;display:grid;gap:4px;}
.checkout-secure strong{font-size:.85rem;}
.checkout-secure span{font-size:.77rem;color:#B7BCDA;}
.checkout-success-mark{width:58px;height:58px;border-radius:50%;display:grid;place-items:center;background:#E6F4EC;color:var(--sage);font-size:1.8rem;font-weight:700;margin:0 auto 18px;}
@media (max-width:760px){
  .checkout-grid{grid-template-columns:1fr;}
  .checkout-summary{position:static;grid-row:1;}
  .checkout-main,.checkout-summary{padding:25px;}
}


/* =====================================================================
   APP WORKSPACE — dashboard navigation + kit-aware tutor
   ===================================================================== */
.learning-overview{
  grid-template-columns:minmax(280px,1.08fr) minmax(220px,.96fr) minmax(200px,.78fr);
  grid-template-rows:auto auto;
}
.due-card{grid-row:1 / 3;}
.courses-overview-card{
  grid-column:2 / 4;display:grid;grid-template-columns:auto minmax(0,1fr) auto;
  align-items:center;gap:18px;padding:21px 24px;background:linear-gradient(135deg,#fff 0%,#f7f6ef 100%);
}
.course-overview-icon{
  width:50px;height:50px;border-radius:15px;display:grid;place-items:center;
  background:var(--navy);color:var(--highlighter);font:600 1.8rem 'Fraunces',serif;
  box-shadow:4px 4px 0 var(--highlighter);
}
.courses-overview-card h3{margin-bottom:3px;}
.courses-overview-card p{margin:0;}
.course-overview-link{
  display:flex!important;align-items:center;gap:8px;padding:10px 14px;border:1px solid var(--paper-3);
  border-radius:999px;text-decoration:none;white-space:nowrap;background:var(--white);
}
.course-overview-link span{font-size:1.05rem;transition:transform .2s ease;}
.course-overview-link:hover span{transform:translateX(3px);}

.study-kit-shell{padding-top:34px;padding-bottom:80px;max-width:1320px;}
.study-kit-layout{display:grid;grid-template-columns:minmax(0,1fr) 360px;gap:28px;align-items:start;}
.study-kit-main{min-width:0;}
.kit-actions{flex-wrap:wrap;justify-content:flex-end;}
.study-tabs{scrollbar-width:none;}
.study-tabs::-webkit-scrollbar,.tutor-actions::-webkit-scrollbar{display:none;}

.tutor-backdrop{display:none;}
.tutor-drawer{
  position:sticky;z-index:10;top:94px;right:auto;width:auto;height:calc(100dvh - 118px);
  min-height:560px;max-height:780px;padding:0;transform:none;background:var(--white);
  border:1px solid var(--paper-3);border-radius:22px;overflow:hidden;
  box-shadow:0 18px 46px rgba(27,35,64,.12);display:flex;flex-direction:column;
}
.tutor-drawer.open{transform:none;}
.tutor-head{
  padding:20px 20px 14px;display:grid;grid-template-columns:auto 1fr;align-items:center;gap:13px;
  background:linear-gradient(145deg,var(--navy),var(--navy-2));color:var(--paper);
}
.tutor-head h2{font-size:1.35rem;line-height:1.15;}
.tutor-head .learning-kicker{color:#AEB5D8;margin-bottom:3px;}
.tutor-avatar{width:45px;height:45px;border-radius:14px;background:var(--paper);display:grid;place-items:center;box-shadow:4px 4px 0 var(--highlighter);}
.tutor-avatar span{width:21px;height:24px;border-radius:5px;background:var(--navy);transform:rotate(-5deg);}
.tutor-status{display:flex;align-items:center;gap:6px;margin-top:5px;color:#D6D9E8;font-size:.66rem;}
.tutor-status i{width:7px;height:7px;border-radius:50%;background:#78D39D;box-shadow:0 0 0 3px rgba(120,211,157,.14);}
.tutor-trust{margin:0;padding:14px 18px 12px;background:#F7F6EF;border-bottom:1px solid var(--paper-3);font-size:.73rem;line-height:1.45;color:var(--ink-soft);}
.tutor-chat-content{flex:1;min-height:0;display:flex;flex-direction:column;}
.tutor-chat-content[hidden],.tutor-consent[hidden]{display:none;}
.tutor-consent{flex:1;min-height:0;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:28px 26px;background:linear-gradient(180deg,#FAFAF7,#F3F2EB);}
.tutor-consent-mark{width:42px;height:42px;border-radius:14px;display:grid;place-items:center;background:var(--highlighter);color:var(--navy);font:700 1.2rem 'Fraunces',serif;box-shadow:4px 4px 0 var(--navy);margin-bottom:18px;}
.tutor-consent h3{font-size:1.2rem;margin-bottom:8px;}
.tutor-consent>p{max-width:290px;color:var(--ink-soft);font-size:.8rem;line-height:1.55;margin-bottom:20px;}
.tutor-consent label{width:100%;display:flex;align-items:center;justify-content:center;gap:8px;padding:11px;border:1px solid var(--paper-3);border-radius:11px;background:var(--white);font-size:.78rem;font-weight:600;margin-bottom:12px;cursor:pointer;}
.tutor-consent input{width:17px;height:17px;accent-color:var(--navy);}
.tutor-consent .btn{font-size:.78rem;padding:11px 16px;}
.tutor-actions{padding:11px 14px 8px;display:flex;gap:7px;overflow-x:auto;background:var(--white);}
.tutor-actions button{flex:0 0 auto;background:var(--paper);border-color:var(--paper-3);transition:border-color .2s,background .2s,transform .2s;}
.tutor-actions button:hover{background:var(--paper-2);border-color:var(--navy);transform:translateY(-1px);}
.tutor-thread{padding:14px;gap:11px;background:linear-gradient(180deg,#FAFAF7,#F3F2EB);overscroll-behavior:contain;}
.tutor-welcome{display:grid;gap:6px;margin:auto;padding:24px 18px;max-width:260px;}
.tutor-welcome strong{font-family:'Fraunces',serif;color:var(--ink);font-size:1rem;}
.tutor-welcome span{font-size:.76rem;line-height:1.5;}
.tutor-msg{box-shadow:0 3px 10px rgba(27,35,64,.05);line-height:1.5;}
.tutor-msg.assistant{background:var(--white);}
.tutor-compose{padding:12px 14px 14px;border-top:1px solid var(--paper-3);background:var(--white);}
.tutor-compose textarea{min-height:72px;max-height:150px;background:var(--paper);border:1.5px solid var(--paper-3);transition:border-color .2s,box-shadow .2s;}
.tutor-compose textarea:focus{outline:none;border-color:var(--navy);box-shadow:0 0 0 3px rgba(27,35,64,.08);}
.tutor-compose>div{margin-top:7px;}
.tutor-compose>div>span{max-width:230px;line-height:1.25;}
.tutor-send{width:38px;height:38px;flex:0 0 38px;border:0;border-radius:50%;display:grid;place-items:center;background:var(--navy);color:var(--paper);font-size:1.05rem;box-shadow:0 3px 0 var(--navy-3);}
.tutor-send:hover{transform:translateY(-1px);}
.tutor-send:disabled{opacity:.45;cursor:not-allowed;transform:none;}

@media (max-width:1080px){
  .study-kit-layout{grid-template-columns:minmax(0,1fr) 320px;gap:20px;}
  .tutor-compose>div>span{max-width:190px;}
}
@media (max-width:980px){
  .study-kit-layout{grid-template-columns:1fr;}
  .tutor-drawer{position:static;width:100%;height:580px;min-height:0;max-height:none;scroll-margin-top:84px;}
  .learning-overview{grid-template-columns:1fr 1fr;grid-template-rows:auto;}
  .due-card{grid-row:span 2;}
  .courses-overview-card{grid-column:1 / 3;}
}
@media (max-width:640px){
  .study-kit-shell{padding:24px 16px 52px;}
  .study-kit-layout{gap:24px;}
  .kit-hero{margin-bottom:20px;}
  .kit-hero h1{font-size:1.65rem;overflow-wrap:anywhere;}
  .kit-actions{width:100%;display:grid;grid-template-columns:1fr 1fr;gap:8px;}
  .kit-actions .btn,.kit-actions form,.kit-actions form button{width:100%;}
  .kit-course-picker{padding:12px;border-radius:12px;background:var(--paper-2);gap:8px;}
  .study-tabs{margin-left:-16px;margin-right:-16px;padding:0 10px;}
  .study-tab{padding:11px 12px;font-size:.82rem;}
  .summary-block,.quiz-q,.card{padding:20px;}
  .card-stage{height:250px;}
  .flash-face{padding:24px 20px;}
  .flash-face .content{font-size:1.08rem;overflow-wrap:anywhere;}
  .deck-stats{width:100%;justify-content:space-between;font-size:.74rem;}
  .deck-tools{width:100%;display:grid;grid-template-columns:1fr 1fr;}
  .deck-tools .btn:first-child{grid-column:1 / 3;}
  .manual-flashcard-form,.manual-flashcard-upgrade{padding:16px;margin-top:22px;}
  .manual-flashcard-upgrade{align-items:flex-start;flex-direction:column;}
  .occlusion-editor img{max-height:none;height:auto;}
  .tutor-drawer{height:min(600px,calc(100svh - 92px));max-width:100%;overflow:clip;border-radius:18px;}
  .tutor-head{padding:17px;}
  .tutor-trust{padding:12px 15px;}
  .tutor-actions{padding-left:12px;padding-right:12px;}
  .tutor-thread{padding:12px;}
  .tutor-compose{padding:10px 12px 12px;}
  .tutor-compose>div>span{max-width:220px;}
  .learning-overview{grid-template-columns:1fr;}
  .due-card{grid-row:auto;}
  .courses-overview-card{grid-column:auto;grid-template-columns:auto 1fr;padding:21px;}
  .course-overview-link{grid-column:1 / 3;justify-content:center;width:100%;}
  .learning-card,.due-card{padding:22px;}
  .course-card{grid-template-columns:auto minmax(0,1fr);padding:18px;}
  .course-card footer{flex-wrap:wrap;gap:5px 12px;}
  .course-title-line{align-items:flex-start;}
  .course-title-line h1{font-size:1.7rem;overflow-wrap:anywhere;}
  .course-kit-list article{flex-direction:column;}
  .course-kit-list article form,.course-kit-list article button{width:100%;}
  .review-session-shell{padding:20px 12px;}
  .review-card-stage{height:240px;}
}
@media (max-width:380px){
  .srs-rating-row{grid-template-columns:repeat(4,minmax(0,1fr));gap:2px;}
  .srs-btn{min-width:0;padding:8px 4px;}
  .srs-btn strong{font-size:.65rem;}
  .tutor-compose>div>span{max-width:175px;}
}


/* Tutor response feedback. The thinking dots are shown while Gemini is
   processing; fresh answers reveal smoothly but respect reduced motion. */
.typing-dots{height:22px;display:flex;align-items:center;gap:5px;padding:2px 1px;}
.typing-dots i{width:7px;height:7px;border-radius:50%;background:var(--ink-soft);animation:tutorTyping 1.15s ease-in-out infinite;}
.typing-dots i:nth-child(2){animation-delay:.15s;}
.typing-dots i:nth-child(3){animation-delay:.3s;}
@keyframes tutorTyping{0%,60%,100%{transform:translateY(0);opacity:.35;}30%{transform:translateY(-4px);opacity:1;}}
.tutor-msg.typing-answer .tutor-richtext:after{content:'|';margin-left:1px;color:var(--highlighter);animation:tutorCursor .75s steps(1) infinite;}
@keyframes tutorCursor{50%{opacity:0;}}
.tutor-richtext{white-space:normal;overflow-wrap:anywhere;}
.tutor-richtext p{white-space:pre-wrap;margin:0 0 9px;}
.tutor-richtext p:last-child{margin-bottom:0;}
.tutor-richtext ul,.tutor-richtext ol{margin:6px 0 10px;padding-left:20px;display:grid;gap:5px;}
.tutor-richtext h4{font:700 .88rem 'Space Grotesk',sans-serif;margin:8px 0 5px;}
.tutor-richtext strong{font-weight:700;}
.tutor-richtext code{font:600 .78em ui-monospace,SFMono-Regular,Consolas,monospace;background:var(--paper-2);padding:2px 4px;border-radius:4px;}
.tutor-richtext a{color:#315CAD;text-decoration:underline;text-underline-offset:2px;word-break:break-word;}
.tutor-richtext em{font-style:italic;}
.tutor-richtext blockquote{margin:8px 0;padding:7px 10px;border-left:3px solid var(--highlighter);background:var(--paper);color:var(--ink-soft);}
.tutor-math{max-width:100%;overflow-x:auto;overflow-y:hidden;scrollbar-width:thin;}
.tutor-math-inline{display:inline;vertical-align:baseline;max-width:100%;font-size:1em;text-transform:none;font-weight:400;margin:0;}
.tutor-math-display{margin:10px 0;padding:8px 4px;text-align:center;}
.tutor-richtext mjx-container{font-size:105%!important;}

/* =====================================================================
   LEARNING EXPERIENCE V2 — proportional dashboard, mobile kit, actions
   ===================================================================== */
.learning-card{display:flex;flex-direction:column;min-width:0;}
.learning-card>a{margin-top:auto;align-self:flex-start;}
.courses-overview-card{display:grid;}
.courses-overview-card p{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.study-momentum{padding:20px 24px;margin:0 0 34px;background:var(--white);border:1px solid var(--paper-3);border-radius:18px;box-shadow:0 10px 28px rgba(27,35,64,.07);display:grid;grid-template-columns:1.2fr .65fr .65fr 1.35fr;align-items:center;gap:24px;}
.momentum-heading{display:flex;align-items:center;gap:13px;}
.momentum-heading>div:last-child{display:grid;}
.momentum-heading span,.momentum-stat span,.daily-goal span{font-size:.68rem;color:var(--ink-soft);text-transform:uppercase;letter-spacing:.05em;}
.momentum-heading strong{font-family:'Fraunces',serif;font-size:1.15rem;}
.momentum-flame{width:42px;height:42px;border-radius:13px;background:var(--navy);color:var(--highlighter);display:grid;place-items:center;transform:rotate(-4deg);}
.momentum-stat{display:grid;border-left:1px solid var(--paper-3);padding-left:22px;}
.momentum-stat strong{font-family:'Fraunces',serif;font-size:1.3rem;}
.daily-goal>div:first-child{display:flex;justify-content:space-between;align-items:center;margin-bottom:6px;}
.goal-track{height:6px;border-radius:999px;background:var(--paper-3);overflow:hidden;}
.goal-track span{display:block;height:100%;background:linear-gradient(90deg,var(--highlighter),var(--sage));border-radius:inherit;}
.daily-goal form{display:flex;gap:5px;margin-top:8px;}
.daily-goal button{border:1px solid var(--paper-3);background:var(--paper);border-radius:999px;padding:4px 9px;font:600 .65rem inherit;color:var(--ink-soft);}
.daily-goal button.active{background:var(--navy);border-color:var(--navy);color:var(--paper);}

.study-kit-main,.study-kit-main>*{min-width:0;max-width:100%;}
.kit-hero h1,.study-summary-text,.study-focus-text,.summary-block,.quiz-q{overflow-wrap:anywhere;word-break:normal;}
.kit-actions>*{min-width:0;max-width:100%;}
.ai-warning{display:grid;grid-template-columns:auto minmax(0,1fr);align-items:center;gap:10px;background:var(--paper-2);border:1px solid var(--paper-3);border-radius:12px;padding:12px 16px;margin-bottom:24px;font-size:.82rem;color:var(--ink-soft);overflow:hidden;}
.kit-course-picker select{min-width:0;max-width:100%;}

.card-management{width:min(100%,680px);background:var(--white);border:1px solid var(--paper-3);border-radius:15px;overflow:hidden;}
.card-management>summary{display:flex;justify-content:space-between;align-items:center;padding:13px 16px;cursor:pointer;font-weight:600;list-style:none;}
.card-management>summary::-webkit-details-marker{display:none;}
.card-management>summary small{padding:4px 9px;border-radius:999px;background:var(--paper-2);color:var(--ink-soft);font-size:.65rem;}
.card-management[open]>summary{border-bottom:1px solid var(--paper-3);}
.card-feedback,.card-ai-tools{padding:13px 16px;display:flex;align-items:center;gap:7px;flex-wrap:wrap;border-bottom:1px solid var(--paper-3);}
.card-feedback>span,.card-ai-tools>span{width:100%;font-size:.68rem;font-weight:700;text-transform:uppercase;color:var(--ink-soft);letter-spacing:.05em;}
.card-feedback button,.card-ai-tools button{border:1px solid var(--paper-3);background:var(--paper);color:var(--ink);border-radius:999px;padding:7px 10px;font:600 .72rem inherit;}
.card-feedback button.active{background:var(--navy);color:var(--paper);border-color:var(--navy);}
.card-edit-form{padding:16px;display:grid;grid-template-columns:1fr 1fr;gap:12px;}
.card-edit-form label{display:grid;gap:6px;font-size:.72rem;font-weight:700;}
.card-edit-form textarea,.card-edit-form input{width:100%;min-width:0;border:1px solid var(--paper-3);border-radius:10px;background:var(--paper);padding:10px;font:inherit;resize:vertical;}
.card-edit-form textarea{min-height:84px;}
.card-edit-form>div{grid-column:1/-1;display:flex;justify-content:space-between;gap:10px;}

.mistake-actions{margin-top:18px;padding-top:16px;border-top:1px solid rgba(255,255,255,.2);text-align:left;}
.mistake-actions[hidden]{display:none;}
.mistake-actions>strong{display:block;margin-bottom:11px;font-family:'Fraunces',serif;font-size:1.05rem;}
.mistake-actions>div{display:flex;flex-wrap:wrap;gap:8px;}
.mistake-actions .btn-ghost{border-color:currentColor;}
.practice-quiz-page{padding-top:42px;padding-bottom:80px;}
.practice-quiz-head{margin:22px 0 30px;}
.practice-quiz-head h1{font-size:2rem;margin-bottom:8px;}
.practice-quiz-head p{color:var(--ink-soft);}
#practiceScore{margin-top:24px;}

.share-dialog{width:min(540px,calc(100vw - 28px));border:1px solid var(--paper-3);border-radius:22px;padding:0;background:var(--white);color:var(--ink);box-shadow:0 30px 80px rgba(27,35,64,.3);}
.share-dialog::backdrop{background:rgba(15,21,43,.55);backdrop-filter:blur(3px);}
.share-dialog-head{display:flex;align-items:flex-start;justify-content:space-between;padding:23px 24px 14px;}
.share-dialog-head h2{font-size:1.45rem;}
.share-dialog-head button{border:0;background:var(--paper-2);border-radius:50%;width:34px;height:34px;font-size:1.25rem;}
.share-dialog>p{padding:0 24px;color:var(--ink-soft);font-size:.84rem;}
.share-link-row{display:flex;gap:8px;padding:18px 24px 0;}
.share-link-row[hidden]{display:none;}
.share-link-row input{min-width:0;flex:1;border:1px solid var(--paper-3);border-radius:10px;background:var(--paper);padding:10px;font:inherit;font-size:.78rem;}
.share-dialog-actions{padding:18px 24px 24px;display:flex;align-items:center;justify-content:space-between;gap:10px;}
.shared-kit-page{padding-top:48px;padding-bottom:80px;}
.shared-kit-page section{padding:32px 0;}
.shared-kit-hero{background:var(--navy);color:var(--paper);border-radius:24px;padding:38px;display:flex;justify-content:space-between;align-items:center;gap:24px;}
.shared-kit-hero h1{font-size:2.3rem;margin:5px 0 8px;overflow-wrap:anywhere;}
.shared-kit-hero p{color:#C7CBE0;}
.shared-summary{max-width:860px;}
.shared-summary h2,.section-title{margin-bottom:16px;}
.section-title{display:flex;justify-content:space-between;align-items:center;font-family:'Fraunces',serif;font-size:1.35rem;}
.section-title strong{font:600 .72rem 'Space Grotesk',sans-serif;background:var(--paper-2);padding:5px 10px;border-radius:999px;}
.shared-card-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;}
.shared-card-grid article{background:var(--white);border:1px solid var(--paper-3);border-radius:16px;padding:20px;}
.shared-card-grid article>span{font-size:.65rem;color:var(--ink-soft);text-transform:uppercase;}
.shared-card-grid h3{font-size:1rem;margin:7px 0 14px;}
.shared-card-grid details{border-top:1px solid var(--paper-3);padding-top:10px;}
.shared-card-grid summary{cursor:pointer;font-size:.76rem;font-weight:700;}
.shared-card-grid details p{margin-top:9px;color:var(--ink-soft);font-size:.84rem;}
.shared-cta{text-align:center;background:var(--paper-2);border-radius:22px;padding:34px;}
.shared-cta p{margin:8px 0 18px;color:var(--ink-soft);}

.tutor-mobile-fab,.tutor-mobile-close{display:none;}

@media (max-width:980px){
  html.tutor-open,html.tutor-open body{overflow:hidden;overscroll-behavior:none;}
  .tutor-mobile-fab{display:grid;place-items:center;position:fixed;z-index:315;right:18px;bottom:calc(18px + env(safe-area-inset-bottom));width:58px;height:58px;border:0;border-radius:50%;background:var(--navy);box-shadow:0 12px 30px rgba(27,35,64,.32);}
  .tutor-fab-mark{width:24px;height:27px;border-radius:6px;background:var(--paper);transform:rotate(-5deg);box-shadow:4px 4px 0 var(--highlighter);}
  .tutor-mobile-fab>i{position:absolute;top:8px;right:8px;width:9px;height:9px;border-radius:50%;background:#78D39D;border:2px solid var(--navy);}
  .tutor-drawer{position:fixed;z-index:330;left:14px;right:14px;bottom:14px;top:auto;width:auto;height:min(720px,calc(100dvh - 28px));min-height:0;max-height:none;opacity:0;pointer-events:none;transform:translateY(calc(100% + 28px));transition:transform .28s cubic-bezier(.16,1,.3,1),opacity .2s;border-radius:22px;}
  .tutor-drawer.mobile-open{opacity:1;pointer-events:auto;transform:translateY(0);}
  .tutor-backdrop{display:block;position:fixed;inset:0;z-index:320;background:rgba(15,21,43,.5);opacity:0;pointer-events:none;transition:opacity .2s;}
  .tutor-backdrop.open{opacity:1;pointer-events:auto;}
  .tutor-head{grid-template-columns:auto minmax(0,1fr) auto;}
  .tutor-mobile-close{display:grid;place-items:center;border:0;width:34px;height:34px;border-radius:50%;background:rgba(255,255,255,.12);color:var(--paper);font-size:1.3rem;}
  .study-momentum{grid-template-columns:1fr 1fr;}
  .daily-goal{grid-column:1/-1;}
}

@media (max-width:640px){
  .app-shell{padding-top:28px!important;padding-bottom:50px!important;}
  .app-header{align-items:stretch;flex-direction:column;margin-bottom:22px;}
  .app-header h1{font-size:1.65rem;}
  .app-header .btn{width:100%;}
  .learning-overview{gap:12px;margin-bottom:22px;}
  .learning-card,.due-card,.courses-overview-card{min-height:0;padding:20px;border-radius:16px;box-shadow:0 8px 22px rgba(27,35,64,.07);}
  .learning-card p,.due-empty{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin-bottom:12px;}
  .courses-overview-card{display:grid;grid-template-columns:42px minmax(0,1fr);gap:12px;}
  .course-overview-icon{width:42px;height:42px;border-radius:12px;font-size:1.45rem;}
  .course-overview-link{grid-column:1/-1;padding:9px 12px;}
  .study-momentum{padding:18px;grid-template-columns:1fr 1fr;gap:18px 12px;margin-bottom:26px;}
  .momentum-heading{grid-column:1/-1;}
  .momentum-stat{padding:0;border:0;}
  .daily-goal{grid-column:1/-1;}
  .study-kit-shell{width:100%;max-width:100%;padding-left:16px;padding-right:16px;overflow:hidden;}
  .study-kit-layout,.study-kit-main{width:100%;max-width:100%;min-width:0;}
  .kit-hero{display:block;}
  .kit-hero h1{width:100%;font-size:clamp(1.6rem,8vw,2rem);line-height:1.13;white-space:normal;overflow-wrap:anywhere;}
  .kit-actions{display:grid;grid-template-columns:1fr 1fr;width:100%;gap:8px;margin-top:18px;}
  .kit-actions>*{width:100%;min-width:0;margin:0;}
  .kit-actions .btn,.kit-actions form button{width:100%;min-width:0;padding:10px 8px;font-size:.78rem;overflow:hidden;text-overflow:ellipsis;}
  #renameForm{width:100%;max-width:100%;}
  #renameForm input{display:block;width:100%!important;max-width:100%;margin-bottom:8px;}
  #renameForm .btn{width:100%;}
  .kit-course-picker{width:100%;max-width:100%;padding:14px;overflow:hidden;}
  .kit-course-picker select{display:block;width:100%;}
  .ai-warning{width:100%;font-size:.76rem;line-height:1.45;padding:12px;}
  .study-tabs{width:100%;max-width:100%;margin-left:0;margin-right:0;padding:0;overscroll-behavior-x:contain;}
  .study-pane{width:100%;max-width:100%;overflow:hidden;}
  .summary-block{width:100%;padding:20px 18px;}
  .study-summary-text,.study-focus-text{font-size:.9rem;line-height:1.62;}
  .card-management{border-radius:13px;}
  .card-edit-form{grid-template-columns:1fr;}
  .card-edit-form>div{grid-column:1;flex-direction:column;}
  .card-edit-form .btn{width:100%;}
  .mistake-actions>div{display:grid;grid-template-columns:1fr;}
  .mistake-actions .btn{width:100%;}
  .tutor-mobile-fab{right:16px;bottom:calc(16px + env(safe-area-inset-bottom));width:56px;height:56px;}
  .tutor-drawer{left:0;right:0;bottom:0;height:100svh;border-radius:22px 22px 0 0;}
  .tutor-compose{padding-bottom:calc(12px + env(safe-area-inset-bottom));}
  .share-dialog{max-height:90svh;}
  .share-link-row,.share-dialog-actions{flex-direction:column;align-items:stretch;}
  .share-dialog-actions .btn{width:100%;}
  .shared-kit-page{padding:24px 16px 60px;}
  .shared-kit-hero{padding:26px 22px;display:block;}
  .shared-kit-hero h1{font-size:1.8rem;}
  .shared-kit-hero .btn{width:100%;margin-top:20px;}
  .shared-card-grid{grid-template-columns:1fr;}
  .practice-quiz-page{padding:28px 16px 60px;}
  .practice-quiz-head h1{font-size:1.7rem;}
}


/* =====================================================================
   MOBILE WIDTH AUDIT — every page stays inside the device viewport
   ===================================================================== */
.pricing-grid>*,.kit-grid>*,.learning-overview>*,.course-grid>*,
.checkout-grid>*,.study-kit-layout>*,.study-kit-main>*{min-width:0;}
.admin-table{max-width:100%;}
.admin-card{max-width:100%;overflow-x:auto;}
.site-footer,.footer-links{max-width:100%;}
.footer-inner p,.fine,.price-card li{overflow-wrap:anywhere;}

@media (max-width:760px){
  .wrap,.wrap-narrow,.nav-inner{width:100%;max-width:100%;padding-left:18px;padding-right:18px;}
  section{padding-top:54px;padding-bottom:54px;}
  .section-head{margin-bottom:30px;}
  .section-head h2,h1,h2,h3{max-width:100%;overflow-wrap:anywhere;}

  .site-nav{width:100%;max-width:100%;}
  .nav-inner{min-height:72px;gap:12px;}
  .logo{min-width:0;font-size:1.18rem;white-space:nowrap;}
  .nav-mobile-toggle{display:block;flex:0 0 auto;padding:8px;color:var(--navy);}
  .nav-links{position:fixed;top:72px;left:0;right:0;width:100%;max-width:100%;max-height:calc(100dvh - 72px);overflow-y:auto;background:var(--paper);border-bottom:1px solid var(--paper-3);padding:20px 18px;flex-direction:column;align-items:flex-start;opacity:0;transform:translateY(-8px);pointer-events:none;display:flex!important;}
  .nav-links.open{opacity:1;transform:translateY(0);pointer-events:auto;}
  .language-picker{width:100%;justify-content:center;margin-top:4px;}
  .language-picker select{width:100%;max-width:220px;}
  .flash-stack{left:16px;right:16px;top:84px;max-width:none;}

  .landing-hero{grid-template-columns:1fr;gap:20px;padding-top:50px;padding-bottom:36px;}
  .landing-hero-copy h1{font-size:clamp(2.15rem,11vw,3rem)!important;line-height:1.08!important;}
  .landing-hero-copy p{font-size:1rem!important;}
  .landing-hero-visual{width:100%;height:270px;overflow:hidden;}
  .landing-card-shadow,.landing-demo-card{width:min(270px,76vw);height:180px;}
  .landing-card-shadow-left{transform:rotate(-7deg) translate(-32px,10px);}
  .landing-card-shadow-right{transform:rotate(4deg) translate(32px,24px);}
  .landing-steps-grid,.landing-benefits-grid{grid-template-columns:1fr;gap:14px;}
  .landing-steps-grid>div{padding:24px!important;}

  .pricing-grid,.stat-row,.kit-grid,.admin-stat-grid{grid-template-columns:1fr!important;}
  .price-card,.price-card.featured{width:100%;max-width:100%;padding:30px 24px;transform:none;}
  .price-card:hover,.price-card.featured:hover{transform:none;}
  .price-card .price{font-size:2rem;}
  .btn{max-width:100%;white-space:normal;text-align:center;line-height:1.25;touch-action:manipulation;}
  .tool-card,.auth-card,.card{padding:22px 18px;}
  .auth-shell{padding-left:16px;padding-right:16px;}
  footer.site-footer{padding:32px 0 calc(24px + env(safe-area-inset-bottom));margin-top:48px;}
  .footer-inner{gap:26px;}
  .footer-brand{width:100%;}
  .footer-brand p{margin-top:10px;max-width:300px;font-size:.82rem;line-height:1.55;}
  .footer-links{width:100%;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;}
  .footer-col{min-width:0;}
  .footer-col h5{font-size:.65rem;letter-spacing:.08em;margin-bottom:7px;}
  .footer-col a{display:flex;align-items:center;min-height:34px;margin:0;font-size:.78rem;line-height:1.25;overflow-wrap:anywhere;}
  footer .fine{display:flex;flex-direction:column;align-items:flex-start;gap:5px;margin-top:26px;padding-top:17px;padding-right:82px;font-size:.7rem;line-height:1.45;}
  .support-fab,.tutor-mobile-fab{border:1px solid rgba(255,255,255,.2);background:#25315C;box-shadow:0 12px 30px rgba(8,13,32,.38);}

  .checkout-account{grid-template-columns:1fr;gap:4px;}
  .checkout-account>span{grid-row:auto;}
  .checkout-account strong,.checkout-account small{text-align:left;overflow-wrap:anywhere;}
  .checkout-main,.checkout-summary{padding:22px 18px;}

  .admin-main{width:100%;min-width:0;max-width:100vw;padding-left:14px;padding-right:14px;}
  .admin-main [style*="grid-template-columns"]{grid-template-columns:1fr!important;}
  .admin-top{align-items:flex-start;flex-direction:column;}
  .admin-card{padding:18px;}
  .admin-table{display:block;max-width:100%;overflow-x:auto;-webkit-overflow-scrolling:touch;white-space:nowrap;}
  .ticket-row{align-items:flex-start;flex-direction:column;}
  .ticket-status{align-self:flex-start;}

  .kit-actions button,.tutor-mobile-fab,.tutor-mobile-close,.share-dialog button{touch-action:manipulation;}
  .share-dialog[open]{display:block;position:fixed;inset:50% auto auto 50%;transform:translate(-50%,-50%);margin:0;max-height:calc(100svh - 28px);overflow-y:auto;}
}

@media (max-width:420px){
  .wrap,.wrap-narrow,.nav-inner{padding-left:16px;padding-right:16px;}
  .logo{font-size:1.08rem;gap:8px;}
  .logo-mark{width:24px;height:24px;}
  .landing-hero-visual{height:245px;}
  .landing-card-shadow,.landing-demo-card{width:min(250px,74vw);height:168px;}
  .support-widget{right:14px;bottom:calc(14px + env(safe-area-inset-bottom));}
  .support-panel{right:0;width:calc(100vw - 28px);max-width:none;}
}