/* =========================================================
   HEIZZAI — AI Auteur
   Shared design system : black / crimson / electric blue
   ========================================================= */

:root{
  --bg:        #050507;
  --bg-2:      #0a0a0f;
  --panel:     rgba(18,18,26,0.55);
  --ink:       #f4f4f8;
  --ink-soft:  #b9b9c7;
  --ink-dim:   #6e6e80;
  --crimson:   #ff1f3d;
  --crimson-2: #c40d24;
  --crimson-glow: rgba(255,31,61,0.55);
  --blue:      #2d7bff;
  --blue-2:    #38e0ff;
  --line:      rgba(255,255,255,0.08);
  --maxw:      1240px;
  --ease:      cubic-bezier(.16,1,.3,1);
  --font-head: "Space Grotesk", "Sora", system-ui, sans-serif;
  --font-body: "Sora", system-ui, sans-serif;
}

*{ box-sizing:border-box; margin:0; padding:0; }
html{ scroll-behavior:smooth; }
body{
  font-family:var(--font-body);
  background:var(--bg);
  color:var(--ink);
  line-height:1.6;
  overflow-x:hidden;
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
  cursor:none;
}
@media (pointer:coarse){ body{ cursor:auto; } }

a{ color:inherit; text-decoration:none; }
img{ max-width:100%; display:block; }
::selection{ background:var(--crimson); color:#fff; }

/* ---- WebGL canvas backdrop ---- */
#bg-canvas{
  position:fixed; inset:0;
  width:100vw; height:100vh;
  z-index:0;
  display:block;
  pointer-events:none;
}
.veil{
  position:fixed; inset:0; z-index:1; pointer-events:none;
  background:
    radial-gradient(120% 80% at 50% -10%, rgba(255,31,61,0.10), transparent 60%),
    radial-gradient(100% 60% at 90% 110%, rgba(45,123,255,0.10), transparent 60%),
    linear-gradient(180deg, rgba(5,5,7,0) 60%, rgba(5,5,7,0.85) 100%);
}
.grain{
  position:fixed; inset:0; z-index:2; pointer-events:none; opacity:.05;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ---- Custom cursor ---- */
.cursor-dot,.cursor-ring{
  position:fixed; top:0; left:0; z-index:9999; pointer-events:none;
  border-radius:50%; transform:translate(-50%,-50%);
  mix-blend-mode:difference;
}
.cursor-dot{ width:7px; height:7px; background:#fff; }
.cursor-ring{
  width:34px; height:34px; border:1.5px solid var(--crimson);
  transition:width .25s var(--ease), height .25s var(--ease), background .25s var(--ease);
}
.cursor-ring.hover{ width:58px; height:58px; background:var(--crimson-glow); border-color:transparent; }
@media (pointer:coarse){ .cursor-dot,.cursor-ring{ display:none; } }

/* ---- Layout wrap ---- */
.wrap{ position:relative; z-index:3; max-width:var(--maxw); margin:0 auto; padding:0 28px; }
main{ position:relative; z-index:3; }
section{ position:relative; }

/* ---- Nav ---- */
.nav{
  position:fixed; top:0; left:0; right:0; z-index:50;
  display:flex; align-items:center; justify-content:space-between;
  padding:20px 32px;
  backdrop-filter:blur(10px);
  background:linear-gradient(180deg, rgba(5,5,7,0.6), rgba(5,5,7,0));
  transition:padding .4s var(--ease), background .4s var(--ease);
}
.nav.scrolled{ padding:13px 32px; background:rgba(5,5,7,0.78); border-bottom:1px solid var(--line); }
.brand{
  font-family:var(--font-head); font-weight:700; font-size:1.35rem; letter-spacing:.02em;
  display:flex; align-items:center; gap:.5ch;
}
.brand b{ color:var(--crimson); text-shadow:0 0 18px var(--crimson-glow); }
.brand .tag{ font-family:var(--font-body); font-size:.6rem; letter-spacing:.4em; text-transform:uppercase; color:var(--ink-dim); margin-left:10px; }
.nav-links{ display:flex; gap:30px; align-items:center; }
.nav-links a{
  position:relative; font-size:.82rem; letter-spacing:.16em; text-transform:uppercase;
  color:var(--ink-soft); padding:6px 0; transition:color .3s;
}
.nav-links a::after{
  content:""; position:absolute; left:0; bottom:0; height:1.5px; width:0;
  background:var(--crimson); box-shadow:0 0 10px var(--crimson-glow); transition:width .35s var(--ease);
}
.nav-links a:hover,.nav-links a.active{ color:#fff; }
.nav-links a:hover::after,.nav-links a.active::after{ width:100%; }

.burger{ display:none; flex-direction:column; gap:5px; background:none; border:0; cursor:pointer; }
.burger span{ width:26px; height:2px; background:var(--ink); transition:.3s; }

@media (max-width:760px){
  .burger{ display:flex; }
  .nav-links{
    position:fixed; inset:0 0 0 auto; width:min(78vw,320px);
    flex-direction:column; justify-content:center; gap:34px;
    background:rgba(8,8,12,0.96); backdrop-filter:blur(16px);
    transform:translateX(100%); transition:transform .5s var(--ease); padding:40px;
  }
  .nav-links.open{ transform:translateX(0); }
  .nav-links a{ font-size:1.1rem; }
  .brand .tag{ display:none; }
}

/* ---- Hero / type ---- */
.eyebrow{
  font-size:.72rem; letter-spacing:.55em; text-transform:uppercase;
  color:var(--crimson); margin-bottom:22px;
  display:inline-flex; align-items:center; gap:12px;
}
.eyebrow::before{ content:""; width:30px; height:1px; background:var(--crimson); box-shadow:0 0 10px var(--crimson-glow); }

h1.display{
  font-family:var(--font-head); font-weight:700;
  font-size:clamp(3.4rem, 12vw, 10rem); line-height:.92; letter-spacing:-.03em;
}
.display .glow{ color:var(--crimson); text-shadow:0 0 40px var(--crimson-glow), 0 0 90px rgba(255,31,61,.25); }
.lede{ max-width:540px; color:var(--ink-soft); font-size:1.06rem; margin-top:26px; }

h2.section-title{
  font-family:var(--font-head); font-weight:700;
  font-size:clamp(2.1rem,5vw,3.6rem); line-height:1.02; letter-spacing:-.02em;
}
.kicker{ font-size:.72rem; letter-spacing:.5em; text-transform:uppercase; color:var(--blue-2); margin-bottom:16px; }

/* ---- Buttons ---- */
.btn{
  display:inline-flex; align-items:center; gap:12px;
  padding:15px 30px; border-radius:50px; font-size:.82rem; letter-spacing:.18em; text-transform:uppercase;
  font-weight:600; position:relative; overflow:hidden; cursor:none; border:1px solid transparent;
  transition:transform .3s var(--ease), box-shadow .3s var(--ease);
}
.btn-primary{ background:var(--crimson); color:#fff; box-shadow:0 0 0 var(--crimson-glow); }
.btn-primary:hover{ transform:translateY(-3px); box-shadow:0 14px 40px var(--crimson-glow); }
.btn-ghost{ border-color:var(--line); color:var(--ink); background:rgba(255,255,255,0.02); }
.btn-ghost:hover{ border-color:var(--crimson); color:#fff; transform:translateY(-3px); box-shadow:0 10px 30px rgba(255,31,61,.18); }
.btn .arrow{ transition:transform .3s var(--ease); }
.btn:hover .arrow{ transform:translateX(5px); }
.cta-row{ display:flex; gap:16px; flex-wrap:wrap; margin-top:40px; }

/* ---- Cards / panels ---- */
.card{
  position:relative; padding:32px; border-radius:20px;
  background:var(--panel); border:1px solid var(--line);
  backdrop-filter:blur(14px); overflow:hidden;
  transition:transform .5s var(--ease), border-color .5s var(--ease), box-shadow .5s var(--ease);
}
.card::before{
  content:""; position:absolute; inset:0; border-radius:20px; padding:1px;
  background:linear-gradient(135deg, var(--crimson), transparent 40%, transparent 60%, var(--blue));
  -webkit-mask:linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite:xor; mask-composite:exclude;
  opacity:0; transition:opacity .5s var(--ease);
}
.card:hover{ transform:translateY(-8px); box-shadow:0 30px 60px rgba(0,0,0,.5); }
.card:hover::before{ opacity:1; }

/* ---- Reveal animation ---- */
.reveal{ opacity:0; transform:translateY(34px); transition:opacity .9s var(--ease), transform .9s var(--ease); }
.reveal.in{ opacity:1; transform:none; }
.reveal.d1{ transition-delay:.08s } .reveal.d2{ transition-delay:.16s }
.reveal.d3{ transition-delay:.24s } .reveal.d4{ transition-delay:.32s }

/* ---- Footer ---- */
.footer{
  position:relative; z-index:3; margin-top:120px; padding:60px 0 40px;
  border-top:1px solid var(--line);
}
.footer .wrap{ display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:20px; }
.footer .brand{ font-size:1.5rem; }
.footer small{ color:var(--ink-dim); letter-spacing:.05em; }
.foot-links{ display:flex; gap:22px; }
.foot-links a{ color:var(--ink-soft); font-size:.85rem; transition:color .3s; }
.foot-links a:hover{ color:var(--crimson); }

/* ---- Section spacing ---- */
.hero{ min-height:100vh; display:flex; align-items:center; padding-top:120px; }
.pad{ padding:120px 0; }
.pad-sm{ padding:80px 0; }

/* ---- Page transition overlay ---- */
.page-fade{
  position:fixed; inset:0; z-index:9000; background:var(--bg); pointer-events:none;
  opacity:0; transition:opacity .5s var(--ease);
}
.page-fade.show{ opacity:1; pointer-events:all; }

/* ---- Scroll progress ---- */
.scroll-bar{
  position:fixed; top:0; left:0; height:3px; width:0; z-index:60;
  background:linear-gradient(90deg, var(--crimson), var(--blue-2));
  box-shadow:0 0 14px var(--crimson-glow);
}

/* ---- Marquee ---- */
.marquee{ overflow:hidden; white-space:nowrap; border-top:1px solid var(--line); border-bottom:1px solid var(--line); padding:26px 0; }
.marquee .track{ display:inline-block; animation:scrollx 24s linear infinite; }
.marquee span{ font-family:var(--font-head); font-size:2rem; font-weight:700; color:transparent; -webkit-text-stroke:1px var(--ink-dim); margin:0 26px; letter-spacing:.02em; }
.marquee span .hot{ -webkit-text-stroke:1px var(--crimson); }
@keyframes scrollx{ to{ transform:translateX(-50%); } }

/* ---- Utility grid ---- */
.grid{ display:grid; gap:24px; }
.g-2{ grid-template-columns:repeat(2,1fr); }
.g-3{ grid-template-columns:repeat(3,1fr); }
@media (max-width:900px){ .g-3{ grid-template-columns:1fr; } .g-2{ grid-template-columns:1fr; } }

.badge{
  display:inline-block; padding:5px 14px; border-radius:50px; font-size:.68rem;
  letter-spacing:.2em; text-transform:uppercase; border:1px solid var(--line); color:var(--ink-soft);
}
.badge.hot{ border-color:var(--crimson); color:var(--crimson); }
.badge.cool{ border-color:var(--blue); color:var(--blue-2); }

.num{ font-family:var(--font-head); font-size:clamp(2.4rem,5vw,3.6rem); font-weight:700; color:#fff; }
.num .accent{ color:var(--crimson); }