/* ============ TOKENS ============ */
:root{
  --bg:#fbfaf6;
  --surface:#ffffff;
  --ink:#1e2a25;
  --ink-soft:#5b6b63;
  --ink-faint:#97a39b;
  --accent:#2f6f5e;
  --accent-dark:#234f42;
  --accent-soft:#e3efe9;
  --gold:#d9a441;
  --gold-soft:#fbf0da;
  --line:#e6e2d6;
  --rose:#c1503d;
  --rose-soft:#f6e6e1;
  --radius:14px;
  --shadow-sm: 0 1px 2px rgba(30,42,37,.06);
  --shadow-md: 0 8px 24px rgba(30,42,37,.09);
  --shadow-lg: 0 20px 48px rgba(30,42,37,.16);
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:'Inter',sans-serif;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{
  font-family:'Fraunces',serif;
  font-weight:600;
  margin:0;
  letter-spacing:-.01em;
}
p{margin:0;}
button{font-family:inherit;cursor:pointer;}
a{color:inherit;}
.mono{font-family:'IBM Plex Mono',monospace;letter-spacing:.02em;}
::selection{background:var(--accent-soft);color:var(--accent-dark);}

@media (prefers-reduced-motion: reduce){
  *{animation-duration:.01ms !important; transition-duration:.01ms !important;}
}

/* ============ LAYOUT ============ */
.wrap{max-width:1180px;margin:0 auto;padding:0 32px;}
@media(max-width:640px){.wrap{padding:0 18px;}}

/* ============ HEADER ============ */
header{
  position:sticky;top:0;z-index:40;
  background:rgba(251,250,246,.86);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.nav{display:flex;align-items:center;justify-content:space-between;padding:18px 0;}
.brand{display:flex;align-items:center;gap:10px;}
.brand-mark{
  width:34px;height:34px;border-radius:8px;
  background:var(--accent);
  display:flex;align-items:center;justify-content:center;
  color:#fff;font-family:'Fraunces',serif;font-weight:700;font-size:17px;
  transform:rotate(-4deg);
  box-shadow:var(--shadow-sm);
}
.brand-name{font-family:'Fraunces',serif;font-size:20px;font-weight:600;}
.brand-tag{font-size:11px;color:var(--ink-faint);font-family:'IBM Plex Mono',monospace;margin-left:2px;}

.nav-links{display:flex;align-items:center;gap:6px;}
.nav-btn{
  background:none;border:none;padding:9px 16px;border-radius:100px;
  font-size:14.5px;font-weight:500;color:var(--ink-soft);
  transition:.15s;
}
.nav-btn:hover{background:var(--accent-soft);color:var(--accent-dark);}
.nav-btn.active{background:var(--accent-soft);color:var(--accent-dark);}
.nav-cta{
  background:var(--ink);color:#fff;border:none;padding:10px 20px;border-radius:100px;
  font-size:14.5px;font-weight:600;transition:.15s;
}
.nav-cta:hover{background:var(--accent-dark);}
.user-chip{
  display:flex;align-items:center;gap:9px;background:var(--surface);
  border:1px solid var(--line);padding:6px 14px 6px 6px;border-radius:100px;box-shadow:var(--shadow-sm);
}
.user-avatar{
  width:28px;height:28px;border-radius:50%;background:var(--gold);
  color:#fff;display:flex;align-items:center;justify-content:center;
  font-family:'Fraunces',serif;font-weight:700;font-size:13px;
}
.user-chip span{font-size:13.5px;font-weight:600;}
.user-chip button{
  background:none;border:none;color:var(--ink-faint);font-size:12px;
  padding:2px 6px;border-radius:6px;
}
.user-chip button:hover{color:var(--rose);}

/* ============ HERO ============ */
.hero{padding:76px 0 56px;position:relative;overflow:hidden;}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-family:'IBM Plex Mono',monospace;font-size:12px;color:var(--accent-dark);
  background:var(--accent-soft);padding:6px 12px;border-radius:100px;margin-bottom:22px;
}
.hero-eyebrow::before{content:'';width:6px;height:6px;border-radius:50%;background:var(--accent);display:block;}
.hero h1{
  font-size:clamp(34px,5.4vw,58px);line-height:1.06;max-width:820px;
}
.hero h1 em{font-style:italic;color:var(--accent);}
.hero p.lede{
  margin-top:22px;font-size:17.5px;line-height:1.6;color:var(--ink-soft);max-width:560px;
}
.hero-stats{display:flex;gap:36px;margin-top:38px;flex-wrap:wrap;}
.hero-stat b{display:block;font-family:'Fraunces',serif;font-size:26px;}
.hero-stat span{font-size:12.5px;color:var(--ink-faint);font-family:'IBM Plex Mono',monospace;}

/* decorative index-card stack, subject-grounded signature */
.hero-deco{
  position:absolute; right:-40px; top:60px; width:340px; height:340px;
  display:none;
}
@media(min-width:980px){.hero-deco{display:block;}}
.deco-card{
  position:absolute; width:230px; background:var(--surface); border:1px solid var(--line);
  border-radius:10px; box-shadow:var(--shadow-md); padding:16px 18px;
}
.deco-card:nth-child(1){top:0;left:60px;transform:rotate(-7deg);}
.deco-card:nth-child(2){top:70px;left:0;transform:rotate(5deg);z-index:2;}
.deco-card .dc-code{font-size:10.5px;color:var(--gold);}
.deco-card .dc-title{font-family:'Fraunces',serif;font-size:15px;margin-top:6px;line-height:1.25;}
.deco-card .dc-line{height:1px;background:var(--line);margin:10px 0;}
.deco-card .dc-meta{font-size:10.5px;color:var(--ink-faint);}

/* ============ SEARCH / FILTER ============ */
.catalog-controls{
  display:flex;gap:14px;align-items:center;flex-wrap:wrap;
  margin:8px 0 30px;
}
.search-box{
  flex:1;min-width:220px;display:flex;align-items:center;gap:10px;
  background:var(--surface);border:1px solid var(--line);border-radius:100px;
  padding:12px 18px;box-shadow:var(--shadow-sm);
}
.search-box svg{flex-shrink:0;color:var(--ink-faint);}
.search-box input{
  border:none;outline:none;background:none;width:100%;font-size:14.5px;color:var(--ink);
  font-family:'Inter',sans-serif;
}
.chips{display:flex;gap:8px;flex-wrap:wrap;}
.chip{
  border:1px solid var(--line);background:var(--surface);padding:9px 15px;border-radius:100px;
  font-size:13px;font-weight:500;color:var(--ink-soft);transition:.15s;
}
.chip:hover{border-color:var(--accent);color:var(--accent-dark);}
.chip.active{background:var(--ink);border-color:var(--ink);color:#fff;}

.section-label{
  display:flex;align-items:baseline;justify-content:space-between;margin:10px 0 20px;
}
.section-label h2{font-size:24px;}
.section-label span{font-size:12.5px;color:var(--ink-faint);font-family:'IBM Plex Mono',monospace;}

/* ============ COURSE GRID ============ */
.grid{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:20px;
  padding-bottom:70px;
}
.course-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px;display:flex;flex-direction:column;gap:14px;
  transition:.2s ease; cursor:pointer;
  position:relative; overflow:hidden;
}
.course-card:hover{
  transform:translateY(-3px); box-shadow:var(--shadow-md); border-color:transparent;
}
.course-card::before{
  content:'';position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--cat-color,var(--accent));
}
.cc-top{display:flex;justify-content:space-between;align-items:flex-start;}
.cc-code{font-size:11px;color:var(--cat-color,var(--accent));font-weight:500;}
.cc-level{
  font-size:10.5px;background:var(--bg);border:1px solid var(--line);padding:3px 9px;border-radius:100px;
  color:var(--ink-faint);
}
.cc-title{font-size:19px;line-height:1.28;}
.cc-instr{font-size:13px;color:var(--ink-soft);margin-top:-4px;}
.cc-desc{font-size:13px;color:var(--ink-soft);line-height:1.55;}
.cc-meta{display:flex;gap:14px;font-size:12px;color:var(--ink-faint);flex-wrap:wrap;}
.cc-meta span{display:flex;align-items:center;gap:4px;}
.cc-foot{display:flex;justify-content:space-between;align-items:center;margin-top:auto;padding-top:10px;border-top:1px dashed var(--line);}
.cc-price{font-family:'Fraunces',serif;font-size:18px;}
.cc-price small{font-family:'Inter',sans-serif;font-size:11px;color:var(--ink-faint);font-weight:400;}
.cc-btn{
  background:var(--accent-soft);color:var(--accent-dark);border:none;
  padding:9px 15px;border-radius:100px;font-size:13px;font-weight:600;
}
.cc-btn:hover{background:var(--accent);color:#fff;}
.cc-enrolled-tag{
  position:absolute;top:14px;right:-32px;background:var(--gold);color:#fff;
  font-size:10.5px;font-weight:700;padding:4px 34px;transform:rotate(38deg);
  font-family:'IBM Plex Mono',monospace;box-shadow:var(--shadow-sm);
}
.cc-complete-tag{
  position:absolute;top:14px;right:-32px;background:var(--accent);color:#fff;
  font-size:10.5px;font-weight:700;padding:4px 34px;transform:rotate(38deg);
  font-family:'IBM Plex Mono',monospace;box-shadow:var(--shadow-sm);
}

/* ============ EMPTY STATE ============ */
.empty-state{
  text-align:center;padding:70px 20px;color:var(--ink-faint);grid-column:1/-1;
}
.empty-state h3{color:var(--ink-soft);margin-bottom:8px;font-size:19px;}
.empty-state p{font-size:13.5px;}

/* ============ MODAL BASE ============ */
.overlay{
  position:fixed;inset:0;background:rgba(30,42,37,.44);backdrop-filter:blur(3px);
  display:none;align-items:center;justify-content:center;z-index:100;padding:20px;
}
.overlay.open{display:flex;animation:fadeIn .18s ease;}
@keyframes fadeIn{from{opacity:0;}to{opacity:1;}}
.modal{
  background:var(--surface);border-radius:18px;max-width:560px;width:100%;
  max-height:88vh;overflow-y:auto;box-shadow:var(--shadow-lg);
  animation:riseIn .22s cubic-bezier(.2,.9,.3,1);
}
@keyframes riseIn{from{opacity:0;transform:translateY(14px) scale(.98);}to{opacity:1;transform:none;}}
.modal-close{
  position:absolute;top:16px;right:16px;background:var(--bg);border:none;
  width:32px;height:32px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  color:var(--ink-soft);z-index:2;
}
.modal-close:hover{background:var(--rose-soft);color:var(--rose);}

/* ---- course detail modal ---- */
.detail-head{position:relative;padding:30px 30px 22px;border-bottom:1px solid var(--line);}
.detail-code{font-size:12px;color:var(--cat-color,var(--accent));font-weight:600;}
.detail-title{font-size:26px;margin-top:8px;line-height:1.2;}
.detail-instr{font-size:14px;color:var(--ink-soft);margin-top:6px;}
.detail-meta-row{display:flex;gap:20px;margin-top:16px;flex-wrap:wrap;}
.detail-meta-row div{font-size:12px;color:var(--ink-faint);}
.detail-meta-row b{display:block;color:var(--ink);font-size:14.5px;font-family:'Fraunces',serif;}
.detail-body{padding:24px 30px 30px;}
.detail-body p{font-size:14.5px;line-height:1.65;color:var(--ink-soft);}
.syllabus{margin-top:22px;}
.syllabus h4{font-size:13px;text-transform:uppercase;letter-spacing:.06em;color:var(--ink-faint);margin-bottom:12px;}
.syl-item{
  display:flex;gap:12px;align-items:flex-start;padding:11px 0;border-top:1px solid var(--line);font-size:13.5px;
}
.syl-item:first-child{border-top:none;}
.syl-num{
  font-family:'IBM Plex Mono',monospace;font-size:11px;color:var(--cat-color,var(--accent));
  background:var(--bg);width:24px;height:24px;border-radius:6px;display:flex;align-items:center;justify-content:center;flex-shrink:0;
}
.syl-type{margin-left:auto;font-size:10.5px;color:var(--ink-faint);font-family:'IBM Plex Mono',monospace;flex-shrink:0;}
.detail-foot{
  display:flex;justify-content:space-between;align-items:center;margin-top:26px;
  padding-top:22px;border-top:1px dashed var(--line);
}
.big-price{font-family:'Fraunces',serif;font-size:24px;}
.btn-primary{
  background:var(--accent);color:#fff;border:none;padding:13px 26px;border-radius:100px;
  font-size:14.5px;font-weight:600;transition:.15s;box-shadow:var(--shadow-sm);
}
.btn-primary:hover{background:var(--accent-dark);}
.btn-primary:disabled{background:var(--ink-faint);cursor:default;}

/* ---- auth modal ---- */
.auth-modal{max-width:400px;padding:34px 34px 30px;position:relative;}
.auth-tabs{display:flex;background:var(--bg);border-radius:100px;padding:4px;margin-bottom:26px;}
.auth-tab{flex:1;text-align:center;padding:9px;border:none;background:none;border-radius:100px;font-size:13.5px;font-weight:600;color:var(--ink-faint);}
.auth-tab.active{background:var(--surface);color:var(--ink);box-shadow:var(--shadow-sm);}
.auth-modal h3{font-size:22px;margin-bottom:6px;}
.auth-sub{font-size:13px;color:var(--ink-soft);margin-bottom:22px;}
.field{margin-bottom:15px;}
.field label{display:block;font-size:12.5px;font-weight:600;color:var(--ink-soft);margin-bottom:6px;}
.field input{
  width:100%;border:1px solid var(--line);border-radius:9px;padding:11px 13px;font-size:14px;
  outline:none;transition:.15s;background:var(--bg);font-family:'Inter',sans-serif;
}
.field input:focus{border-color:var(--accent);background:#fff;box-shadow:0 0 0 3px var(--accent-soft);}
.auth-error{
  background:var(--rose-soft);color:var(--rose);font-size:12.5px;padding:10px 13px;border-radius:9px;margin-bottom:14px;display:none;
}
.auth-error.show{display:block;}
.auth-submit{width:100%;padding:12.5px;margin-top:6px;}
.auth-switch{text-align:center;font-size:13px;color:var(--ink-soft);margin-top:18px;}
.auth-switch button{background:none;border:none;color:var(--accent);font-weight:600;}

/* ---- ticket (signature element) ---- */
.ticket-overlay .modal{max-width:420px;background:transparent;box-shadow:none;overflow:visible;}
.ticket{
  background:var(--surface);border-radius:16px;box-shadow:var(--shadow-lg);
  position:relative;overflow:hidden;
}
.ticket-main{padding:28px 26px 20px;}
.ticket-stamp{
  position:absolute;top:22px;right:26px;border:2px solid var(--gold);color:var(--gold);
  font-family:'IBM Plex Mono',monospace;font-size:11px;font-weight:700;padding:6px 10px;
  border-radius:6px;transform:rotate(-10deg);letter-spacing:.05em;
}
.ticket-stamp.complete{border-color:var(--accent);color:var(--accent);}
.ticket-eyebrow{font-size:11px;color:var(--ink-faint);font-family:'IBM Plex Mono',monospace;}
.ticket-title{font-size:23px;margin-top:8px;max-width:80%;line-height:1.2;}
.ticket-instr{font-size:13px;color:var(--ink-soft);margin-top:6px;}
.ticket-seam{
  position:relative;height:0;border-top:2px dashed var(--line);margin:0 0;
}
.ticket-seam::before,.ticket-seam::after{
  content:'';position:absolute;top:-11px;width:22px;height:22px;border-radius:50%;background:var(--bg);
}
.ticket-seam::before{left:-11px;}
.ticket-seam::after{right:-11px;}
.ticket-stub{padding:18px 26px 26px;display:flex;justify-content:space-between;align-items:center;}
.ticket-stub div span{display:block;font-size:10.5px;color:var(--ink-faint);text-transform:uppercase;letter-spacing:.05em;}
.ticket-stub div b{font-family:'IBM Plex Mono',monospace;font-size:13.5px;}
.ticket-cta{margin-top:20px;text-align:center;}
.ticket-cta button{width:100%;}

/* ============ MY LEARNING ============ */
.learning-view{display:none;padding:44px 0 80px;}
.learning-view.open{display:block;}
.catalog-view.hidden,.hero.hidden{display:none;}
.progress-track{background:var(--line);height:7px;border-radius:100px;overflow:hidden;margin-top:10px;}
.progress-fill{background:var(--accent);height:100%;border-radius:100px;transition:width .3s;}
.enrolled-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px;margin-bottom:16px;
}
.enrolled-card.is-complete{border-color:var(--accent);}
.ec-top{display:flex;justify-content:space-between;align-items:flex-start;gap:14px;flex-wrap:wrap;}
.ec-title{font-size:18px;}
.ec-code{font-size:11px;color:var(--cat-color,var(--accent));}
.ec-pct{font-family:'Fraunces',serif;font-size:20px;color:var(--accent);}
.ec-badge{
  font-size:10.5px;font-weight:700;color:var(--accent);background:var(--accent-soft);
  padding:4px 10px;border-radius:100px;font-family:'IBM Plex Mono',monospace;
}
.ec-modules{margin-top:16px;display:flex;flex-direction:column;gap:8px;}
.module-row{
  display:flex;align-items:center;gap:12px;font-size:13px;color:var(--ink-soft);
  background:var(--bg);padding:10px 14px;border-radius:10px;border:none;width:100%;
  text-align:left;transition:.15s;
}
.module-row:hover{background:var(--accent-soft);color:var(--accent-dark);}
.module-row.done{color:var(--ink-faint);}
.module-row.done .mr-title{text-decoration:line-through;}
.mr-icon{
  width:26px;height:26px;border-radius:50%;flex-shrink:0;display:flex;align-items:center;justify-content:center;
  background:var(--surface);border:1px solid var(--line);font-size:12px;
}
.module-row.done .mr-icon{background:var(--accent);border-color:var(--accent);color:#fff;}
.mr-title{flex:1;}
.mr-type{font-size:10px;color:var(--ink-faint);font-family:'IBM Plex Mono',monospace;text-transform:uppercase;flex-shrink:0;}
.empty-learning{text-align:center;padding:80px 20px;}
.empty-learning h3{font-size:22px;margin-bottom:10px;}
.empty-learning p{color:var(--ink-soft);font-size:14px;margin-bottom:22px;}

/* ---- module modal (content + quiz) ---- */
.module-head{padding:28px 30px 18px;border-bottom:1px solid var(--line);}
.module-eyebrow{font-size:11px;color:var(--cat-color,var(--accent));font-family:'IBM Plex Mono',monospace;font-weight:600;}
.module-title{font-size:22px;margin-top:8px;line-height:1.25;}
.module-body{padding:24px 30px;}
.module-media{
  background:var(--bg);border:1px solid var(--line);border-radius:12px;padding:18px;
  margin-bottom:18px;display:flex;gap:12px;align-items:flex-start;
}
.module-media .mm-icon{
  width:36px;height:36px;border-radius:10px;background:var(--accent-soft);color:var(--accent-dark);
  display:flex;align-items:center;justify-content:center;flex-shrink:0;font-size:16px;
}
.module-media p{font-size:13.5px;line-height:1.6;color:var(--ink-soft);}
.module-media .mm-label{font-size:10.5px;color:var(--ink-faint);font-family:'IBM Plex Mono',monospace;margin-bottom:4px;text-transform:uppercase;}
.quiz-box{border-top:1px dashed var(--line);padding-top:20px;}
.quiz-box h4{font-size:13px;text-transform:uppercase;letter-spacing:.06em;color:var(--ink-faint);margin-bottom:14px;display:inline-block;}
.quiz-progress{
  font-size:11px;color:var(--accent-dark);background:var(--accent-soft);
  display:inline-block;padding:3px 10px;border-radius:100px;margin-bottom:12px;font-weight:600;
}
.quiz-dots{display:flex;gap:6px;margin:0 0 16px;}
.quiz-dot{width:8px;height:8px;border-radius:50%;background:var(--line);}
.quiz-dot.done{background:var(--accent);}
.quiz-dot.current{background:var(--gold);}
.quiz-question{font-size:15px;margin-bottom:14px;line-height:1.4;}
.quiz-options{display:flex;flex-direction:column;gap:9px;margin-bottom:18px;}
.quiz-option{
  display:flex;align-items:center;gap:11px;border:1px solid var(--line);border-radius:10px;
  padding:11px 14px;font-size:13.5px;background:var(--surface);transition:.15s;text-align:left;
}
.quiz-option:hover{border-color:var(--accent);}
.quiz-option.selected{border-color:var(--accent);background:var(--accent-soft);color:var(--accent-dark);}
.quiz-option.correct{border-color:var(--accent);background:var(--accent-soft);color:var(--accent-dark);}
.quiz-option.incorrect{border-color:var(--rose);background:var(--rose-soft);color:var(--rose);}
.quiz-option input{accent-color:var(--accent);}
.quiz-feedback{font-size:13px;padding:10px 13px;border-radius:9px;margin-bottom:14px;display:none;}
.quiz-feedback.show{display:block;}
.quiz-feedback.ok{background:var(--accent-soft);color:var(--accent-dark);}
.quiz-feedback.bad{background:var(--rose-soft);color:var(--rose);}
.module-foot{display:flex;justify-content:flex-end;gap:10px;padding:0 30px 28px;}
.btn-ghost{
  background:none;border:1px solid var(--line);color:var(--ink-soft);padding:12px 22px;border-radius:100px;
  font-size:14px;font-weight:600;
}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent-dark);}

/* ============ TOAST ============ */
.toast{
  position:fixed;bottom:26px;left:50%;transform:translateX(-50%) translateY(20px);
  background:var(--ink);color:#fff;padding:13px 22px;border-radius:100px;font-size:13.5px;
  box-shadow:var(--shadow-lg);opacity:0;pointer-events:none;transition:.25s;z-index:200;
}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0);}

/* ============ FOOTER ============ */
footer{border-top:1px solid var(--line);padding:34px 0;margin-top:20px;}
footer .wrap{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:10px;}
footer p{font-size:12.5px;color:var(--ink-faint);}

/* focus visibility */
button:focus-visible, input:focus-visible, .course-card:focus-visible{
  outline:2px solid var(--accent); outline-offset:2px;
}