/* ============================================================
   IRON MAN — The Story of a Legend — stylesheet
   (No image URLs here: the visuals are drawn to <canvas>.)
   ============================================================ */

:root{
  --bg:#06070c;
  --ink:#f3f4f7;
  --muted:#9aa1b0;
  --gold:#f5b53f;
  --gold-soft:#ffd580;
  --red:#d1122b;
  --red-hot:#ff2e46;
  --line:rgba(255,255,255,.12);
  --head:'Oswald', 'Arial Narrow', sans-serif;
  --body:'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --wrap:1180px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--body);background:var(--bg);color:var(--ink);line-height:1.6;-webkit-font-smoothing:antialiased;overflow-x:clip}
img,canvas{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 34px}

/* ---------- Fixed top bar ---------- */
header{position:fixed;top:0;left:0;right:0;z-index:50;display:flex;align-items:center;justify-content:space-between;
  height:70px;padding:0 34px;pointer-events:none}
.wordmark{font-family:var(--head);font-weight:600;letter-spacing:.5em;text-transform:uppercase;font-size:1.02rem}
.wordmark b{color:var(--red-hot);font-weight:700}
.chapter-ind{font-family:var(--head);font-weight:400;letter-spacing:.28em;font-size:.82rem;color:var(--muted)}
.chapter-ind b{color:var(--gold);font-weight:600}
.topbar{position:fixed;top:0;left:0;height:3px;background:linear-gradient(90deg,var(--red),var(--gold));width:0%;z-index:60;box-shadow:0 0 12px rgba(245,181,63,.6)}

/* ---------- Nav ---------- */
.wordmark,.nav,.nav-right,.hamburger{pointer-events:auto}
.wordmark{transition:opacity .25s ease}
.wordmark:hover{opacity:.82}
.nav{display:flex;gap:30px;align-items:center}
.nav a{font-family:var(--head);font-weight:500;letter-spacing:.16em;text-transform:uppercase;font-size:.74rem;color:var(--muted);
  position:relative;padding:6px 0;transition:color .25s ease}
.nav a:hover,.nav a:focus-visible{color:var(--ink);outline:none}
.nav a::after{content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:linear-gradient(90deg,var(--red),var(--gold));transition:width .3s ease}
.nav a:hover::after,.nav a:focus-visible::after{width:100%}
.nav-right{display:flex;align-items:center;gap:18px}
.hamburger{display:none;width:44px;height:44px;flex-direction:column;align-items:center;justify-content:center;gap:5px;
  background:transparent;border:0;cursor:pointer;padding:0}
.hamburger span{display:block;width:24px;height:2px;background:var(--ink);border-radius:2px;transition:transform .3s ease,opacity .2s ease}
.hamburger.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.hamburger.open span:nth-child(2){opacity:0}
.hamburger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* anchor targets clear the fixed bar */
#stageA,#stageB,#evolution,#arsenal,#numbers{scroll-margin-top:80px}

/* ---------- Scrolly stage ---------- */
.scrolly{position:relative;height:300vh}
.sticky{position:sticky;top:0;height:100vh;overflow:hidden;background:#04050a}
.stage-fallback{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:0;filter:saturate(1.05)}
.stage-canvas{position:absolute;inset:0;width:100%;height:100%;z-index:0}
.veil{position:absolute;inset:0;z-index:1;
  background:
    radial-gradient(120% 90% at 30% 60%, transparent 30%, rgba(4,5,10,.55) 100%),
    linear-gradient(to top, rgba(4,5,10,.94) 0%, rgba(4,5,10,.18) 40%, rgba(4,5,10,.45) 100%);
}

/* ---------- Captions ---------- */
.cap{position:absolute;left:0;right:0;bottom:0;z-index:3;padding-bottom:12vh}
.cap .accent{width:56px;height:3px;background:linear-gradient(90deg,var(--red),var(--gold));margin-bottom:24px;transform-origin:left}
.eyebrow{font-family:var(--head);font-weight:500;letter-spacing:.42em;text-transform:uppercase;font-size:.8rem;color:var(--gold);display:block;margin-bottom:.7em}
.cap h2{font-family:var(--head);font-weight:600;text-transform:uppercase;line-height:.98;letter-spacing:.01em;
  font-size:clamp(2.6rem,8vw,6.2rem);margin-bottom:.32em}
.cap h2 .q{color:var(--gold-soft)}
.cap p{font-size:clamp(1rem,1.4vw,1.2rem);color:var(--muted);max-width:52ch;font-weight:300}
.cap .stat{margin-top:26px;font-family:var(--head);letter-spacing:.2em;text-transform:uppercase;font-size:.78rem;color:var(--ink)}
.cap .stat b{color:var(--red-hot);font-weight:600}

/* JS-driven reveal */
.js .cap{opacity:0;transform:translateY(30px);transition:opacity .9s ease, transform .9s ease}
.js .cap.on{opacity:1;transform:none}
html:not(.js) .cap ~ .cap{display:none}

/* progress rail */
.rail{position:absolute;right:30px;top:50%;transform:translateY(-50%);z-index:4;width:2px;height:140px;background:rgba(255,255,255,.14);border-radius:2px;overflow:hidden}
.rail i{position:absolute;left:0;top:0;width:100%;height:0%;background:linear-gradient(var(--gold),var(--red));border-radius:2px}
html:not(.js) .rail{display:none}

.scroll-hint{position:absolute;bottom:26px;left:50%;transform:translateX(-50%);z-index:4;
  font-family:var(--head);font-size:.7rem;letter-spacing:.34em;text-transform:uppercase;color:var(--muted);
  display:flex;flex-direction:column;align-items:center;gap:9px;transition:opacity .5s ease}
.scroll-hint i{width:1px;height:44px;background:linear-gradient(var(--gold),transparent);animation:pulse 2s ease infinite}
html:not(.js) .scroll-hint{display:none}
@keyframes pulse{0%,100%{opacity:.3;transform:scaleY(.6)}50%{opacity:1;transform:scaleY(1)}}

/* ---------- New content sections ---------- */
.page-section{position:relative;background:var(--bg);padding:110px 0}
.page-section#arsenal{background:linear-gradient(180deg,#04050a,#07080f)}
.numbers-section{background:#04050a;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}

.accent{width:56px;height:3px;background:linear-gradient(90deg,var(--red),var(--gold));border-radius:2px}
.accent.center{margin:0 auto 22px}
.sec-head{margin-bottom:56px;max-width:640px}
.sec-head .accent{margin-bottom:22px}
.sec-title{font-family:var(--head);font-weight:600;text-transform:uppercase;line-height:.98;letter-spacing:.01em;
  font-size:clamp(2.2rem,5.5vw,4rem)}
.sec-lead{color:var(--muted);font-weight:300;font-size:clamp(1rem,1.3vw,1.15rem);max-width:56ch;margin-top:16px}

/* Timeline */
.timeline{list-style:none;position:relative;padding-left:34px}
.timeline::before{content:"";position:absolute;left:6px;top:6px;bottom:6px;width:2px;
  background:linear-gradient(var(--red),var(--gold))}
.tl-item{position:relative;padding:0 0 42px 26px}
.tl-item:last-child{padding-bottom:0}
.tl-node{position:absolute;left:-34px;top:4px;width:16px;height:16px;border-radius:50%;
  background:var(--bg);border:3px solid var(--gold);box-shadow:0 0 0 4px rgba(6,7,12,1),0 0 14px rgba(245,181,63,.5)}
.tl-node.last{border-color:var(--red-hot);box-shadow:0 0 0 4px rgba(6,7,12,1),0 0 16px rgba(255,46,70,.6)}
.tl-card{border:1px solid var(--line);border-left:3px solid var(--red);border-radius:10px;padding:22px 26px;
  background:linear-gradient(180deg,rgba(255,255,255,.035),rgba(255,255,255,.01));transition:border-color .3s ease,transform .3s ease}
.tl-card:hover{border-left-color:var(--gold);transform:translateX(4px)}
.tl-tag{font-family:var(--head);font-weight:600;letter-spacing:.24em;text-transform:uppercase;font-size:.72rem;color:var(--gold)}
.tl-card h3{font-family:var(--head);font-weight:600;text-transform:uppercase;letter-spacing:.02em;font-size:1.4rem;margin:6px 0 8px}
.tl-card p{color:var(--muted);font-weight:300;font-size:.98rem;max-width:60ch}

/* Arsenal cards */
.card-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.tech-card{border:1px solid var(--line);border-radius:12px;padding:30px 26px;
  background:linear-gradient(180deg,rgba(255,255,255,.04),rgba(255,255,255,.008));
  transition:transform .3s ease,border-color .3s ease,box-shadow .3s ease}
.tech-card:hover{transform:translateY(-6px);border-color:rgba(245,181,63,.5);box-shadow:0 18px 40px rgba(0,0,0,.45)}
.tech-icon{width:56px;height:56px;color:var(--gold);margin-bottom:20px}
.tech-icon svg{width:100%;height:100%}
.tech-card h3{font-family:var(--head);font-weight:600;text-transform:uppercase;letter-spacing:.04em;font-size:1.22rem;margin-bottom:10px}
.tech-card p{color:var(--muted);font-weight:300;font-size:.94rem}

/* Stat row */
.stat-row{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;text-align:center}
.stat-cell{padding:26px 12px;border:1px solid var(--line);border-radius:12px;
  background:linear-gradient(180deg,rgba(255,255,255,.03),transparent)}
.stat-cell b{display:block;font-family:var(--head);font-weight:700;line-height:1;
  font-size:clamp(2.8rem,6vw,4.4rem);
  background:linear-gradient(180deg,var(--gold-soft),var(--red-hot));-webkit-background-clip:text;background-clip:text;color:transparent}
.stat-cell span{display:block;margin-top:12px;font-family:var(--head);letter-spacing:.2em;text-transform:uppercase;font-size:.72rem;color:var(--muted)}

/* Closing tribute */
.tribute{background:#04050a;padding:90px 0;text-align:center}
.tribute-line{font-family:var(--head);font-weight:500;text-transform:uppercase;letter-spacing:.04em;line-height:1.15;
  font-size:clamp(1.5rem,3.4vw,2.4rem);max-width:20ch;margin:0 auto;color:var(--ink)}

/* Scroll reveal (only hidden when JS is active) */
.js .reveal{opacity:0;transform:translateY(28px);transition:opacity .8s ease,transform .8s ease}
.js .reveal.in{opacity:1;transform:none}
.js .timeline .tl-item.reveal:nth-child(2){transition-delay:.08s}
.js .timeline .tl-item.reveal:nth-child(3){transition-delay:.16s}
.js .timeline .tl-item.reveal:nth-child(4){transition-delay:.24s}
.js .timeline .tl-item.reveal:nth-child(5){transition-delay:.32s}
.js .card-grid .tech-card.reveal:nth-child(2){transition-delay:.08s}
.js .card-grid .tech-card.reveal:nth-child(3){transition-delay:.16s}
.js .card-grid .tech-card.reveal:nth-child(4){transition-delay:.24s}
.js .stat-row .stat-cell.reveal:nth-child(2){transition-delay:.08s}
.js .stat-row .stat-cell.reveal:nth-child(3){transition-delay:.16s}
.js .stat-row .stat-cell.reveal:nth-child(4){transition-delay:.24s}
@media (prefers-reduced-motion:reduce){
  .js .reveal{opacity:1;transform:none;transition:none}
}

/* ---------- Back to top ---------- */
.to-top{position:fixed;right:24px;bottom:24px;z-index:70;width:50px;height:50px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;cursor:pointer;
  color:#0a0a0f;border:0;background:linear-gradient(145deg,var(--gold-soft),var(--gold));
  box-shadow:0 6px 20px rgba(0,0,0,.5),0 0 0 1px rgba(255,46,70,.35);
  opacity:0;visibility:hidden;transform:translateY(14px) scale(.9);
  transition:opacity .3s ease,transform .3s ease,visibility .3s,box-shadow .3s ease}
.to-top svg{width:22px;height:22px}
.to-top:hover{background:linear-gradient(145deg,var(--red-hot),var(--red));color:var(--ink);
  box-shadow:0 8px 26px rgba(209,18,43,.55),0 0 0 1px rgba(245,181,63,.5)}
.to-top:focus-visible{outline:2px solid var(--gold);outline-offset:3px}
.to-top.show{opacity:1;visibility:visible;transform:none}

/* ---------- Footer ---------- */
footer{background:#04050a;border-top:1px solid var(--line);padding:70px 0 46px;text-align:center}
footer .big{font-family:var(--head);font-weight:600;text-transform:uppercase;letter-spacing:.04em;font-size:clamp(1.8rem,5vw,3.4rem)}
footer .big span{color:var(--gold)}
footer p{color:var(--muted);font-weight:300;font-size:.9rem;margin-top:16px}
footer .fine{margin-top:28px;font-size:.76rem;color:#5b6070;letter-spacing:.03em}

/* ---------- Responsive ---------- */
@media (max-width:980px){
  .card-grid{grid-template-columns:repeat(2,1fr)}
}

@media (max-width:780px){
  header{padding:0 20px}
  .wrap{padding:0 22px}
  .hamburger{display:flex}
  .nav{position:fixed;top:70px;left:0;right:0;flex-direction:column;gap:0;align-items:stretch;
    background:rgba(6,7,12,.97);border-top:1px solid var(--line);border-bottom:1px solid var(--line);
    padding:6px 0;
    opacity:0;visibility:hidden;transform:translateY(-12px);pointer-events:none;
    transition:opacity .3s ease,transform .3s ease,visibility .3s}
  .nav.open{opacity:1;visibility:visible;transform:none;pointer-events:auto}
  .nav a{display:flex;align-items:center;min-height:48px;padding:12px 22px;font-size:.92rem;letter-spacing:.14em;color:var(--ink)}
  .nav a::after{display:none}
  .nav a:active{background:rgba(255,255,255,.05)}
  .page-section{padding:76px 0}
  .tribute{padding:70px 0}
  .stat-row{grid-template-columns:repeat(2,1fr)}
}

@media (max-width:640px){
  .cap p{max-width:none}
  .rail{display:none}
}

@media (max-width:480px){
  .card-grid{grid-template-columns:1fr}
  .sec-head{margin-bottom:40px}
  .tl-card{padding:18px 18px}
  .tl-card p,.tech-card p{max-width:none}
  .to-top{width:44px;height:44px;right:16px;bottom:16px}
  .to-top svg{width:20px;height:20px}
  .nav-right{gap:12px}
  .chapter-ind{font-size:.74rem}
  .wordmark{font-size:.9rem;letter-spacing:.38em}
}