/* ============================================================
   KYAMCH Club — Thorax Olympiad
   Design tokens
   Palette: clinical-paper background, surgical teal, amber gold
   (podium/prizes), coral pulse (signature EKG line), deep ink navy.
   Type: Fraunces (display) + Inter (body) + IBM Plex Mono (data/timer)
   Signature: an animated EKG line that runs through the hero and
   reappears as the countdown/timer heartbeat.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,500;9..144,600;9..144,700&family=Inter:wght@400;500;600;700&family=IBM+Plex+Mono:wght@500;600&display=swap');

:root{
  --paper: #F5FAF9;
  --paper-2: #EAF3F1;
  --ink: #16232B;
  --ink-soft: #3E535C;
  --teal: #0F6E67;
  --teal-deep: #0A4D48;
  --amber: #F2A93B;
  --amber-deep: #C97F12;
  --coral: #E85C4A;
  --silver: #9AA7B0;
  --bronze: #B8763E;
  --line: #D3E4E1;
  --radius: 14px;
  --shadow: 0 10px 30px -12px rgba(15,110,103,0.25);
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:'Inter',system-ui,sans-serif;
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,.display{
  font-family:'Fraunces',serif;
  font-weight:600;
  letter-spacing:-0.01em;
  color:var(--ink);
  margin:0 0 .4em;
}
.mono{font-family:'IBM Plex Mono',monospace;}
a{color:var(--teal-deep);}
p{margin:0 0 1em;}
.container{max-width:1080px;margin:0 auto;padding:0 24px;}
.wrap-narrow{max-width:720px;margin:0 auto;padding:0 24px;}

/* ---------- Nav ---------- */
.topbar{
  position:sticky;top:0;z-index:50;
  background:rgba(245,250,249,0.88);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
}
.topbar-inner{
  max-width:1080px;margin:0 auto;padding:14px 24px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.brand{display:flex;align-items:center;gap:10px;font-family:'Fraunces',serif;font-weight:700;font-size:1.05rem;text-decoration:none;color:var(--ink);}
.brand-mark{width:28px;height:28px;flex:none;}
.nav-links{display:flex;gap:22px;align-items:center;font-size:.92rem;font-weight:500;}
.nav-links a{color:var(--ink-soft);text-decoration:none;}
.nav-links a:hover{color:var(--teal-deep);}
.nav-links a.btn-primary{color:#fff;}
.nav-links a.btn-primary:hover{color:#fff;}
.nav-links .nav-cta{padding:8px 18px;}

.nav-toggle{
  display:none;background:none;border:none;cursor:pointer;color:var(--ink);
  padding:6px;margin-left:auto;
}
.nav-toggle svg{width:24px;height:24px;display:block;}
.nav-toggle .icon-close{display:none;}
.nav-toggle.active .icon-menu{display:none;}
.nav-toggle.active .icon-close{display:block;}

@media (max-width:760px){
  .nav-toggle{display:flex;}
  .nav-links{
    display:none;position:absolute;top:100%;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:0;
    background:#fff;border-bottom:1px solid var(--line);
    box-shadow:0 12px 24px -12px rgba(15,35,43,.15);
    padding:8px 24px 18px;
  }
  .nav-links.open{display:flex;}
  .nav-links a{padding:14px 0;border-bottom:1px solid var(--line);font-size:1rem;}
  .nav-links a:last-of-type{border-bottom:none;}
  .nav-links .nav-cta{
    margin-top:12px;text-align:center;border-bottom:none;padding:12px 18px;
  }
}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:999px;font-weight:600;font-size:.95rem;
  text-decoration:none;border:1px solid transparent;cursor:pointer;
  transition:transform .15s ease, box-shadow .15s ease, background .15s ease;
}
.btn:active{transform:scale(.97);}
.btn-primary{background:var(--teal);color:#fff;box-shadow:var(--shadow);}
.btn-primary:hover{background:var(--teal-deep);}
.btn-amber{background:var(--amber);color:#3A2600;}
.btn-amber:hover{background:var(--amber-deep);color:#fff;}
.btn-outline{background:transparent;border-color:var(--teal);color:var(--teal-deep);}
.btn-outline:hover{background:var(--paper-2);}
.btn-danger{background:var(--coral);color:#fff;}
.btn-block{width:100%;}
.btn[disabled]{opacity:.5;cursor:not-allowed;}

/* ---------- Hero / EKG signature ---------- */
.hero{position:relative;overflow:hidden;padding:64px 0 40px;}
.ekg-line{width:100%;height:64px;display:block;margin:18px 0 8px;}
.ekg-path{
  fill:none;stroke:var(--coral);stroke-width:3;stroke-linecap:round;stroke-linejoin:round;
  stroke-dasharray:1400;stroke-dashoffset:1400;
  animation:ekg-draw 3.2s ease-out forwards, ekg-pulse 2.4s ease-in-out 3.2s infinite;
}
@keyframes ekg-draw{to{stroke-dashoffset:0;}}
@keyframes ekg-pulse{
  0%,100%{opacity:1;} 50%{opacity:.55;}
}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--paper-2);border:1px solid var(--line);color:var(--teal-deep);
  font-size:.78rem;font-weight:600;letter-spacing:.04em;text-transform:uppercase;
  padding:6px 14px;border-radius:999px;margin-bottom:18px;
}
.hero h1{font-size:clamp(2rem,5vw,3.1rem);max-width:820px;}
.hero .lede{font-size:1.1rem;color:var(--ink-soft);max-width:620px;}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-top:26px;}

/* ---------- Countdown ---------- */
.countdown{
  display:flex;gap:14px;flex-wrap:wrap;margin-top:34px;
}
.count-box{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:14px 20px;min-width:88px;text-align:center;box-shadow:var(--shadow);
}
.count-box .num{font-family:'IBM Plex Mono',monospace;font-size:1.7rem;font-weight:600;color:var(--teal-deep);}
.count-box .lbl{font-size:.72rem;letter-spacing:.06em;text-transform:uppercase;color:var(--ink-soft);}

/* ---------- Cards / sections ---------- */
section{padding:46px 0;}
.section-title{display:flex;align-items:baseline;gap:12px;margin-bottom:22px;}
.section-title .idx{font-family:'IBM Plex Mono',monospace;color:var(--amber-deep);font-size:.85rem;}
.rib-divider{
  height:14px;width:100%;
  background-image:repeating-linear-gradient(90deg, transparent 0 26px, var(--line) 26px 27px);
  border-radius:0 0 40px 40px / 0 0 14px 14px;
  margin:36px 0;opacity:.7;
}
.grid{display:grid;gap:18px;}
.grid-3{grid-template-columns:repeat(3,1fr);}
.grid-2{grid-template-columns:repeat(2,1fr);}
@media (max-width:820px){.grid-3{grid-template-columns:1fr;}.grid-2{grid-template-columns:1fr;}}

.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:24px;box-shadow:0 1px 2px rgba(15,35,43,.04);
}
.card h3{font-size:1.05rem;}
.card .icon{width:34px;height:34px;color:var(--teal);margin-bottom:12px;}

/* ---------- Olympiads listing cards ---------- */
.oly-grid{display:grid;gap:18px;grid-template-columns:repeat(2,1fr);}
@media (max-width:820px){.oly-grid{grid-template-columns:1fr;}}

.oly-card{
  display:flex;flex-direction:column;gap:6px;text-align:left;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:26px;box-shadow:0 1px 2px rgba(15,35,43,.04);
  text-decoration:none;color:inherit;
  transition:box-shadow .2s ease, transform .2s ease;
}
.oly-card:hover{box-shadow:var(--shadow);transform:translateY(-2px);}
.oly-card h3{font-size:1.2rem;margin:6px 0 2px;}
.oly-card p{color:var(--ink-soft);font-size:.92rem;margin:0 0 4px;}

.oly-status{
  align-self:flex-start;display:inline-block;padding:3px 12px;border-radius:999px;
  font-size:.72rem;font-weight:700;letter-spacing:.02em;text-transform:uppercase;
}
.oly-status-open{background:#E7F5EE;color:#0F6E42;}
.oly-status-upcoming{background:#FDF1DE;color:#9A5B00;}
.oly-status-closed{background:var(--paper-2);color:var(--ink-soft);}

.oly-cta{margin-top:auto;padding-top:10px;font-weight:600;color:var(--teal-deep);font-size:.9rem;text-decoration:none;}
.oly-cta:hover{text-decoration:underline;}

/* ---------- Podium / prizes ---------- */
.podium{display:flex;align-items:flex-end;gap:16px;margin-top:10px;}
.podium .place{
  flex:1;border-radius:var(--radius) var(--radius) 0 0;text-align:center;
  padding:22px 14px;color:#fff;position:relative;
}
.podium .place .rank{font-family:'IBM Plex Mono',monospace;font-size:1.6rem;font-weight:600;}
.podium .place .gift{font-size:.85rem;opacity:.95;}
.place-1{background:linear-gradient(160deg,var(--amber),var(--amber-deep));height:190px;order:2;}
.place-2{background:linear-gradient(160deg,#C7D0D4,var(--silver));height:150px;order:1;color:#22303a;}
.place-3{background:linear-gradient(160deg,#D79A63,var(--bronze));height:130px;order:3;}

/* ---------- Forms ---------- */
.form-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:32px;box-shadow:var(--shadow);max-width:520px;margin:0 auto;
}
label{display:block;font-weight:600;font-size:.85rem;margin:16px 0 6px;color:var(--ink-soft);}
label:first-of-type{margin-top:0;}
input[type=text],input[type=email],input[type=password],input[type=tel],select,textarea{
  width:100%;padding:11px 13px;border:1px solid var(--line);border-radius:10px;
  font-family:inherit;font-size:.96rem;background:var(--paper);color:var(--ink);
}
input:focus,select:focus,textarea:focus{
  outline:2px solid var(--teal);outline-offset:1px;background:#fff;
}
.help{font-size:.8rem;color:var(--ink-soft);margin-top:4px;}

.link-btn{
  background:none;border:none;padding:0;cursor:pointer;
  color:var(--teal-deep);font-size:.85rem;font-weight:600;
}
.link-btn:hover{text-decoration:underline;}

.pw-field{position:relative;}
.pw-field input{padding-right:44px;}
.pw-toggle{
  position:absolute;right:6px;top:50%;transform:translateY(-50%);
  background:none;border:none;cursor:pointer;color:var(--ink-soft);
  padding:6px;border-radius:8px;line-height:0;
}
.pw-toggle:hover{color:var(--teal-deep);background:var(--paper-2);}
.pw-toggle svg{width:20px;height:20px;display:block;}
.pw-toggle .icon-eye-off{display:none;}
.pw-toggle.active .icon-eye{display:none;}
.pw-toggle.active .icon-eye-off{display:block;}

.callout{
  display:flex;gap:12px;align-items:flex-start;
  background:var(--paper-2);border:1px solid var(--line);border-radius:12px;
  padding:16px 18px;margin-bottom:20px;
}
.callout .callout-icon{flex:none;width:22px;height:22px;color:var(--teal-deep);margin-top:2px;}
.callout strong{color:var(--teal-deep);}
.callout a{font-weight:600;}

.alert{
  padding:12px 16px;border-radius:10px;font-size:.9rem;margin-bottom:18px;
}
.alert-error{background:#FDECEA;color:#9B2C1F;border:1px solid #F3B9B0;}
.alert-success{background:#E7F5EE;color:#0F6E42;border:1px solid #B4E1C6;}
.alert-info{background:var(--paper-2);color:var(--teal-deep);border:1px solid var(--line);}

/* ---------- Tables ---------- */
table{width:100%;border-collapse:collapse;font-size:.92rem;}
th,td{padding:10px 12px;text-align:left;border-bottom:1px solid var(--line);}
th{font-size:.75rem;text-transform:uppercase;letter-spacing:.05em;color:var(--ink-soft);}
tr.me{background:#FDF4E3;}

/* ---------- Leaderboard: podium + stacked rows ---------- */
.lb-podium{display:flex;gap:14px;margin:18px 0 28px;align-items:stretch;}
.lb-place{
  flex:1;min-width:0;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);
  display:flex;flex-direction:column;
}
.lb-place-rank{
  padding:14px 0;text-align:center;color:#fff;
  font-family:'IBM Plex Mono',monospace;font-weight:700;font-size:1.05rem;
  display:flex;align-items:center;justify-content:center;gap:6px;
}
.lb-place-1 .lb-place-rank{background:linear-gradient(160deg,var(--amber),var(--amber-deep));}
.lb-place-2 .lb-place-rank{background:linear-gradient(160deg,#C7D0D4,var(--silver));color:#22303a;}
.lb-place-3 .lb-place-rank{background:linear-gradient(160deg,#D79A63,var(--bronze));}
.lb-place-1{transform:translateY(-8px);}
.lb-place-name{font-family:'Fraunces',serif;font-weight:600;font-size:1rem;text-align:center;margin:12px 14px 0;word-break:break-word;}
.lb-place-meta{font-size:.76rem;color:var(--ink-soft);text-align:center;margin-top:4px;}
.lb-place-score{font-family:'IBM Plex Mono',monospace;font-weight:600;color:var(--teal-deep);text-align:center;margin-top:10px;font-size:1.05rem;}
.lb-place-time{font-size:.76rem;color:var(--ink-soft);text-align:center;margin:4px 0 16px;}
.lb-place.lb-me{outline:2px solid var(--amber-deep);outline-offset:2px;}

.board-list{display:flex;flex-direction:column;gap:10px;}
.board-row{
  display:flex;align-items:center;gap:14px;
  background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px 16px;
}
.board-row.me{background:#FDF4E3;border-color:var(--amber);}
.board-rank{
  flex:none;width:32px;height:32px;border-radius:50%;background:var(--paper-2);
  display:flex;align-items:center;justify-content:center;
  font-family:'IBM Plex Mono',monospace;font-weight:600;color:var(--ink-soft);
}
.board-main{flex:1;min-width:0;}
.board-name{font-weight:600;}
.board-meta{font-size:.78rem;color:var(--ink-soft);margin-top:2px;}
.board-stats{flex:none;text-align:right;}
.board-score{font-family:'IBM Plex Mono',monospace;font-weight:600;color:var(--teal-deep);}
.board-time{font-size:.76rem;color:var(--ink-soft);margin-top:2px;}

@media (max-width:600px){
  .lb-podium{flex-direction:column;}
  .lb-place-1{transform:none;}
}
.badge{display:inline-block;padding:3px 10px;border-radius:999px;font-size:.72rem;font-weight:600;}
.badge-gold{background:var(--amber);color:#3A2600;}
.badge-silver{background:var(--silver);color:#1c2a31;}
.badge-bronze{background:var(--bronze);color:#fff;}
.badge-ok{background:#E7F5EE;color:#0F6E42;}
.badge-pending{background:#FDF1DE;color:#9A5B00;}
.badge-no{background:#FDECEA;color:#9B2C1F;}

/* ---------- Exam room ---------- */
.exam-shell{min-height:100vh;background:var(--paper-2);user-select:none;-webkit-user-select:none;}
.exam-top{
  position:sticky;top:0;z-index:20;background:var(--ink);color:#fff;
  padding:12px 0;
}
.exam-top-inner{max-width:900px;margin:0 auto;padding:0 20px;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:10px;}
.timer{
  font-family:'IBM Plex Mono',monospace;font-size:1.3rem;font-weight:600;
  background:rgba(255,255,255,.08);padding:6px 16px;border-radius:10px;
  display:flex;align-items:center;gap:8px;
}
.timer.low{color:var(--coral);animation:ekg-pulse 1s infinite;}
.progress-track{height:6px;background:var(--line);border-radius:99px;overflow:hidden;max-width:900px;margin:0 auto;}
.progress-fill{height:100%;background:var(--teal);transition:width .3s ease;}
.exam-body{max-width:900px;margin:0 auto;padding:28px 20px 100px;}
.q-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;margin-bottom:0;}
.q-meta{display:flex;justify-content:space-between;color:var(--ink-soft);font-size:.82rem;margin-bottom:10px;}
.q-text{font-size:1.12rem;font-weight:600;margin-bottom:20px;}
.option{
  display:flex;align-items:flex-start;gap:12px;border:1px solid var(--line);
  border-radius:10px;padding:13px 16px;margin-bottom:10px;cursor:pointer;
  transition:border-color .15s, background .15s;
}
.option:hover{border-color:var(--teal);}
.option.selected{border-color:var(--teal);background:#EAF6F4;}
.option input{margin-top:3px;}
.tf-item{
  border:1px solid var(--line);border-radius:12px;padding:16px;margin-bottom:14px;
  background:#fff;
}
.tf-item-text{
  display:flex;align-items:flex-start;gap:10px;
  font-weight:600;margin-bottom:14px;line-height:1.4;
}
.tf-letter-badge{
  display:inline-flex;align-items:center;justify-content:center;flex:none;
  width:26px;height:26px;border-radius:50%;
  background:var(--teal);color:#fff;
  font-family:'IBM Plex Mono',monospace;font-weight:600;font-size:.8rem;
  margin-top:1px;
}
.tf-item-choices{
  display:flex;border:1px solid var(--line);border-radius:10px;overflow:hidden;
}
.tf-choice{
  flex:1;display:flex;align-items:center;justify-content:center;gap:6px;
  padding:12px 8px;margin:0;cursor:pointer;font-weight:600;
  color:var(--ink-soft);background:#fff;text-align:center;
  transition:background .15s ease,color .15s ease;
  border-right:1px solid var(--line);
}
.tf-choice:last-child{border-right:none;}
.tf-choice input{position:absolute;opacity:0;width:0;height:0;}
.tf-choice .tick,.tf-choice .cross{font-size:1rem;line-height:1;}
.tf-choice.true-choice.selected{background:var(--teal);color:#fff;}
.tf-choice.false-choice.selected{background:var(--coral);color:#fff;}
.tf-choice:not(.selected):hover{background:var(--paper-2);}

/* ---------- Answer sheet review (post-release) ---------- */
.option.as-correct{border-color:#2f9e63;background:#E7F5EE;}
.option.as-wrong{border-color:var(--coral);background:#FDECEA;}
.option .as-tag{margin-left:auto;font-size:.72rem;font-weight:700;padding:2px 9px;border-radius:999px;}
.option.as-correct .as-tag{background:#2f9e63;color:#fff;}
.option.as-wrong .as-tag{background:var(--coral);color:#fff;}
.tf-choice.as-correct{background:#2f9e63;color:#fff;border-color:#2f9e63;}
.tf-choice.as-wrong{background:var(--coral);color:#fff;border-color:var(--coral);}
.q-card.as-right{border-left:4px solid #2f9e63;}
.q-card.as-wrong-card{border-left:4px solid var(--coral);}
.q-card.as-unanswered{border-left:4px solid var(--ink-soft);}
.as-summary{display:flex;gap:14px;flex-wrap:wrap;margin:18px 0;}
.as-stat{flex:1;min-width:110px;background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px;text-align:center;}
.as-stat .num{font-family:'IBM Plex Mono',monospace;font-weight:600;font-size:1.3rem;}
.as-stat .lbl{font-size:.75rem;color:var(--ink-soft);}
.exam-nav{display:flex;justify-content:space-between;margin-top:20px;gap:10px;flex-wrap:wrap;}

/* ---------- Floating "jump to question" widget ---------- */
.qgrid-toggle{
  position:fixed;bottom:22px;right:20px;z-index:70;
  width:56px;height:56px;border-radius:50%;border:none;cursor:pointer;
  background:var(--teal);color:#fff;box-shadow:0 10px 24px -8px rgba(15,35,43,.4);
  display:flex;align-items:center;justify-content:center;
}
.qgrid-toggle svg{width:24px;height:24px;}
.qgrid-toggle .badge-count{
  position:absolute;top:-4px;right:-4px;background:var(--amber-deep);color:#fff;
  font-family:'IBM Plex Mono',monospace;font-size:.68rem;font-weight:700;
  border-radius:999px;padding:2px 6px;min-width:20px;text-align:center;
}
.qgrid-panel{
  position:fixed;bottom:88px;right:20px;z-index:70;
  width:min(320px, calc(100vw - 40px));max-height:min(60vh, 420px);
  background:#fff;border:1px solid var(--line);border-radius:16px;
  box-shadow:0 20px 44px -14px rgba(15,35,43,.35);
  display:none;flex-direction:column;overflow:hidden;
}
.qgrid-panel.open{display:flex;}
.qgrid-panel-head{
  display:flex;align-items:center;justify-content:space-between;
  padding:12px 14px;border-bottom:1px solid var(--line);font-weight:600;font-size:.85rem;
}
.qgrid-panel-head button{background:none;border:none;cursor:pointer;color:var(--ink-soft);padding:4px;}
.qgrid{
  display:grid;grid-template-columns:repeat(5,1fr);gap:6px;
  padding:12px 14px;overflow-y:auto;
}
.qgrid button{
  aspect-ratio:1;border-radius:8px;border:1px solid var(--line);background:#fff;
  font-family:'IBM Plex Mono',monospace;font-size:.78rem;cursor:pointer;
}
.qgrid button.answered{background:var(--teal);color:#fff;border-color:var(--teal);}
.qgrid button.current{outline:2px solid var(--amber-deep);}
@media (min-width:480px){.qgrid{grid-template-columns:repeat(8,1fr);}}

.warn-overlay{
  position:fixed;inset:0;background:rgba(22,35,43,.92);color:#fff;z-index:200;
  display:flex;align-items:center;justify-content:center;text-align:center;padding:30px;
}
.warn-overlay .box{max-width:420px;}
.no-select{user-select:none;-webkit-user-select:none;}

footer{padding:36px 0;color:var(--ink-soft);font-size:.85rem;border-top:1px solid var(--line);margin-top:40px;}

.certificate{
  background:#fff;border:2px solid var(--amber);border-radius:18px;
  padding:44px;text-align:center;max-width:720px;margin:0 auto;
}
.certificate .rank-word{font-family:'Fraunces',serif;font-size:2.4rem;color:var(--amber-deep);}
@media print{
  .topbar,footer,.no-print{display:none;}
  body{background:#fff;}
}

@media (prefers-reduced-motion: reduce){
  .ekg-path{animation:none;stroke-dashoffset:0;}
}