:root{
  --bg:#05070d;
  --bg-elev:#0a0f1c;
  --surface:#0d1424;
  --surface-2:#121b30;
  --line:#213152;
  --line-soft:#182238;
  --ink:#eef1f8;
  --ink-dim:#9aa8c4;
  --ink-faint:#7683a0;
  --gold:#d9b872;
  --gold-bright:#f0cf8e;
  --cyan:#59dcf0;
  --cyan-dim:#2fa8bd;
  --radius:10px;
  --ease:cubic-bezier(.16,1,.3,1);
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%;overscroll-behavior:none}
body{
  background:var(--bg);color:var(--ink);
  font-family:'Inter',system-ui,sans-serif;line-height:1.55;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
kbd{
  font-family:'JetBrains Mono',monospace;font-size:12px;background:var(--surface);
  border:1px solid var(--line);border-bottom-width:2px;border-radius:6px;padding:2px 7px;color:var(--cyan);
}
::selection{background:var(--gold);color:#0a0f1c}

.cursor-blink{color:var(--cyan);margin-left:2px;animation:blink 1s step-end infinite}
@keyframes blink{0%,100%{opacity:1}50%{opacity:0}}

/* ---------- AMBIENT LAYERS ---------- */
.starfield{position:fixed;inset:0;z-index:0;pointer-events:none}

.deck-bg{
  position:fixed;inset:0;z-index:0;pointer-events:none;
  background:
    radial-gradient(900px 560px at 82% -8%, rgba(217,184,114,.10), transparent 60%),
    radial-gradient(760px 520px at 6% 108%, rgba(89,220,240,.09), transparent 60%);
}
.deck-bg::before{
  content:"";position:absolute;inset:0;opacity:.5;
  background-image:
    linear-gradient(rgba(217,184,114,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(217,184,114,.05) 1px, transparent 1px);
  background-size:52px 52px;
  -webkit-mask-image:radial-gradient(ellipse 80% 60% at 50% 40%, #000 20%, transparent 92%);
  mask-image:radial-gradient(ellipse 80% 60% at 50% 40%, #000 20%, transparent 92%);
}
.deck-bg::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:repeating-linear-gradient(rgba(255,255,255,.012) 0px, rgba(255,255,255,.012) 1px, transparent 1px, transparent 3px);
  mix-blend-mode:overlay;
}

.vault-emblem{
  position:fixed;top:50%;left:50%;z-index:0;pointer-events:none;
  width:min(72vw,760px);height:min(72vw,760px);
  transform:translate(-50%,-50%);opacity:.16;
}
.vault-emblem .ring-outer{transform-origin:200px 200px;animation:spin-cw 140s linear infinite}
.vault-emblem .ring-mid{transform-origin:200px 200px;animation:spin-ccw 100s linear infinite}
.vault-emblem .ring-inner{transform-origin:200px 200px;animation:spin-cw 70s linear infinite}
@keyframes spin-cw{to{transform:rotate(360deg)}}
@keyframes spin-ccw{to{transform:rotate(-360deg)}}

.equation-ticker{
  position:fixed;left:0;right:0;bottom:0;z-index:35;height:26px;overflow:hidden;
  background:linear-gradient(180deg, transparent, rgba(5,7,13,.7));
  border-top:1px solid var(--line-soft);
  pointer-events:none;
}
.ticker-track{
  display:flex;white-space:nowrap;width:max-content;
  font-family:'JetBrains Mono',monospace;font-size:11px;color:var(--cyan-dim);
  padding-top:5px;animation:ticker 46s linear infinite;
}
.ticker-track span{padding-right:0}
@keyframes ticker{from{transform:translateX(0)}to{transform:translateX(-50%)}}

@media(prefers-reduced-motion:reduce){
  .vault-emblem .ring-outer,.vault-emblem .ring-mid,.vault-emblem .ring-inner,.ticker-track,.cursor-blink{animation:none}
}

/* ---------- TOP CHROME ---------- */
.deck-home{
  position:fixed;top:22px;left:24px;z-index:40;
  font-family:'JetBrains Mono',monospace;font-size:13px;color:var(--ink-dim);
  background:var(--surface);border:1px solid var(--line);border-radius:99px;
  padding:8px 16px;transition:.2s var(--ease);
}
.deck-home:hover{border-color:var(--cyan);color:var(--cyan);box-shadow:0 0 16px -4px rgba(89,220,240,.5)}

.deck-progress{position:fixed;top:0;left:0;right:0;height:3px;z-index:50;background:var(--surface-2)}
.deck-progress span{
  display:block;height:100%;width:11.11%;
  background:linear-gradient(90deg,var(--gold),var(--cyan));
  box-shadow:0 0 10px rgba(217,184,114,.6);
  transition:width .5s var(--ease);
}

/* ---------- DECK / SLIDES ---------- */
.deck{position:relative;height:100vh;height:100dvh;overflow:hidden;z-index:1}
.slide{
  position:absolute;inset:0;display:flex;align-items:center;justify-content:center;
  padding:90px 28px 118px;
  opacity:0;transform:translateY(28px);
  transition:opacity .55s var(--ease),transform .55s var(--ease);
  pointer-events:none;
}
.slide.active{opacity:1;transform:none;pointer-events:auto;z-index:2}
.slide-inner{
  width:100%;max-width:880px;max-height:100%;overflow-y:auto;
  -webkit-overflow-scrolling:touch;
  scrollbar-width:none;
}
.slide-inner::-webkit-scrollbar{display:none}
.slide-inner.cover{text-align:center;display:flex;flex-direction:column;align-items:center}

.anim{opacity:0;transform:translateY(18px);transition:opacity .55s var(--ease),transform .55s var(--ease)}
.slide.active .anim{opacity:1;transform:none}
.slide.active .anim:nth-child(1){transition-delay:.05s}
.slide.active .anim:nth-child(2){transition-delay:.12s}
.slide.active .anim:nth-child(3){transition-delay:.19s}
.slide.active .anim:nth-child(4){transition-delay:.26s}
.slide.active .anim:nth-child(5){transition-delay:.33s}

.tag{
  display:inline-block;font-family:'JetBrains Mono',monospace;font-size:13px;color:var(--cyan);
  background:var(--surface);border:1px solid var(--line);border-radius:99px;padding:7px 16px;margin-bottom:26px;
  box-shadow:inset 0 0 12px rgba(89,220,240,.08);
}
.eyebrow{
  display:block;font-family:'JetBrains Mono',monospace;font-size:12px;letter-spacing:.18em;text-transform:uppercase;
  color:var(--cyan);margin-bottom:14px;
}
h1{
  font-family:'Jost',sans-serif;font-weight:700;letter-spacing:.01em;text-transform:uppercase;
  font-size:clamp(36px,6.6vw,66px);line-height:1.08;margin-bottom:20px;
  color:var(--ink);text-shadow:0 0 30px rgba(217,184,114,.18);
}
.slide[data-slide="0"] h1{animation:glitch 1s ease .5s 1 both}
@keyframes glitch{
  0%{text-shadow:2px 0 var(--cyan),-2px 0 var(--gold)}
  20%{text-shadow:-2px 0 var(--cyan),2px 0 var(--gold)}
  40%{text-shadow:1px 0 var(--cyan),-1px 0 var(--gold)}
  60%{text-shadow:-1px 0 var(--cyan),1px 0 var(--gold)}
  80%{text-shadow:0 0 30px rgba(217,184,114,.18)}
  100%{text-shadow:0 0 30px rgba(217,184,114,.18)}
}
h2{
  font-family:'Jost',sans-serif;font-weight:600;letter-spacing:.01em;text-transform:uppercase;
  font-size:clamp(24px,4vw,38px);line-height:1.2;margin-bottom:18px;max-width:24ch;color:var(--ink);
}
.sub{font-size:clamp(17px,2.4vw,22px);color:var(--ink-dim);max-width:44ch;margin:0 auto 22px}
.lead{font-size:clamp(15px,1.9vw,18px);color:var(--ink-dim);max-width:58ch;margin-bottom:26px}
.cover-meta{
  font-family:'JetBrains Mono',monospace;font-size:13px;color:var(--gold);margin-bottom:52px;letter-spacing:.03em;
}
.hint{font-family:'JetBrains Mono',monospace;font-size:12.5px;color:var(--ink-faint)}

/* ---------- CARDS ---------- */
.cards-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.cards-2x2{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
@media(max-width:760px){.cards-3,.cards-2x2{grid-template-columns:1fr}}
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px 20px;text-align:left;transition:.3s var(--ease);position:relative;overflow:hidden;
}
.card::before{content:"";position:absolute;left:0;top:0;width:2px;height:0;background:var(--cyan);transition:height .3s var(--ease)}
.card:hover{border-color:rgba(217,184,114,.5);transform:translateY(-3px);box-shadow:0 18px 36px -18px rgba(217,184,114,.3),0 0 24px -10px rgba(89,220,240,.25)}
.card:hover::before{height:100%}
.card-tag{
  display:inline-block;font-family:'JetBrains Mono',monospace;font-size:10.5px;letter-spacing:.12em;text-transform:uppercase;
  color:var(--gold);margin-bottom:10px;
}
.card h3{font-family:'Jost',sans-serif;font-size:17px;margin-bottom:8px;font-weight:600;text-transform:none;letter-spacing:0}
.card p{font-size:14px;color:var(--ink-dim)}

/* ---------- STATS ---------- */
.stats-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
@media(max-width:640px){.stats-grid{grid-template-columns:repeat(2,1fr)}}
.stat{background:var(--surface);padding:26px 18px;text-align:center}
.stat-num{
  display:block;font-family:'Orbitron',sans-serif;font-weight:700;font-size:clamp(24px,4vw,34px);
  color:var(--gold-bright);line-height:1;margin-bottom:8px;text-shadow:0 0 18px rgba(217,184,114,.35);
}
.stat-lab{display:block;font-size:12.5px;color:var(--ink-dim);line-height:1.35}

.big-stats{display:flex;flex-wrap:wrap;gap:16px;margin-bottom:26px}
.big-stat{
  flex:1 1 260px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:30px 26px;text-align:left;
}
.big-stat .stat-num{font-size:clamp(32px,5.4vw,48px);margin-bottom:10px}
.big-stat .stat-lab{font-size:14px}

/* ---------- TIMELINE ---------- */
.deck-timeline{display:flex;flex-direction:column;gap:0}
.dt-item{
  display:grid;grid-template-columns:120px 1fr;gap:18px;padding:16px 0;border-bottom:1px solid var(--line-soft);
  align-items:baseline;text-align:left;
}
.dt-item:last-child{border-bottom:none}
.dt-when{font-family:'JetBrains Mono',monospace;font-size:12px;color:var(--ink-faint)}
.dt-role{font-family:'Jost',sans-serif;font-weight:600;font-size:16px;grid-column:1/-1;margin-top:-8px;text-transform:uppercase;letter-spacing:.01em}
.dt-desc{font-size:14px;color:var(--ink-dim);grid-column:1/-1}
.dt-item.current .dt-role{color:var(--gold-bright)}
@media(min-width:641px){
  .dt-item{grid-template-columns:120px 220px 1fr}
  .dt-role{grid-column:auto;margin-top:0}
  .dt-desc{grid-column:auto}
}

/* ---------- TAG CLOUD ---------- */
.tag-cloud{display:flex;flex-wrap:wrap;gap:10px;justify-content:center}
.tag-cloud span{
  font-family:'JetBrains Mono',monospace;font-size:13.5px;color:var(--ink);
  background:var(--surface);border:1px solid var(--line);border-radius:99px;padding:9px 16px;
  transition:.2s var(--ease);
}
.tag-cloud span:hover{border-color:var(--cyan);color:var(--cyan);transform:translateY(-2px);box-shadow:0 0 14px -4px rgba(89,220,240,.5)}

/* ---------- EDU ---------- */
.edu-list{display:flex;flex-direction:column;text-align:left}
.edu-row{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px;
  padding:15px 0;border-bottom:1px solid var(--line-soft);font-size:15px;
}
.edu-row:last-child{border-bottom:none}
.edu-row .st{
  font-family:'JetBrains Mono',monospace;font-size:11.5px;color:var(--cyan);
  border:1px solid var(--cyan-dim);border-radius:99px;padding:3px 10px;white-space:nowrap;
}
.edu-row .st.done{color:var(--ink-faint);border-color:var(--line)}

/* ---------- BUTTONS ---------- */
.cta-row{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin-bottom:26px}
.btn{
  font-family:'JetBrains Mono',monospace;font-size:13px;font-weight:500;
  padding:12px 20px;border-radius:99px;border:1px solid var(--line);color:var(--ink);
  background:var(--surface);transition:.25s var(--ease);display:inline-flex;align-items:center;gap:8px;
}
.btn.primary{background:var(--gold);border-color:var(--gold);color:#0a0f1c;font-weight:700}
.btn.primary:hover{background:var(--gold-bright);border-color:var(--gold-bright);box-shadow:0 0 22px -4px rgba(217,184,114,.6)}
.btn:hover{border-color:var(--cyan);color:var(--cyan);transform:translateY(-2px);box-shadow:0 0 18px -6px rgba(89,220,240,.5)}
.deck-back-link{
  font-family:'JetBrains Mono',monospace;font-size:13px;color:var(--cyan);
  border-bottom:1px solid transparent;transition:.2s;
}
.deck-back-link:hover{border-color:var(--cyan)}

/* ---------- DOTS + CONTROLS ---------- */
.deck-dots{
  position:fixed;right:22px;top:50%;transform:translateY(-50%);z-index:40;
  display:flex;flex-direction:column;gap:10px;
}
.deck-dots .dot{
  width:9px;height:9px;border-radius:50%;background:transparent;border:1.5px solid var(--ink-faint);
  cursor:pointer;padding:0;transition:.25s var(--ease);
}
.deck-dots .dot.active{background:var(--gold);border-color:var(--gold);transform:scale(1.3);box-shadow:0 0 10px rgba(217,184,114,.7)}
.deck-dots .dot:hover{border-color:var(--cyan)}

.deck-controls{
  position:fixed;left:24px;bottom:34px;z-index:40;
  display:flex;align-items:center;gap:12px;
  font-family:'JetBrains Mono',monospace;font-size:12.5px;color:var(--ink-faint);
}
.deck-btn{
  width:36px;height:36px;border-radius:50%;background:var(--surface);border:1px solid var(--line);
  color:var(--ink-dim);cursor:pointer;display:flex;align-items:center;justify-content:center;
  transition:.2s var(--ease);
}
.deck-btn:hover{border-color:var(--cyan);color:var(--cyan);box-shadow:0 0 14px -4px rgba(89,220,240,.5)}
.deck-btn:disabled{opacity:.35;cursor:default;pointer-events:none}

@media(max-width:680px){
  .deck-dots{display:none}
  .slide{padding:80px 20px 108px}
  .deck-home{top:16px;left:16px;font-size:12px;padding:7px 13px}
  .vault-emblem{opacity:.10}
}

@media(prefers-reduced-motion:reduce){
  .slide,.anim{transition:opacity .2s linear !important;transform:none !important}
  .deck-progress span,.card,.tag-cloud span,.btn,.deck-btn{transition:none}
  .slide[data-slide="0"] h1{animation:none}
}