/* ════════════════════════════════════════════════════════════════════
   Atelier — landing. Dark-celestial + gold, painterly. Become the creator.
   ════════════════════════════════════════════════════════════════════ */

:root{
  --bg:#040b14;        /* matched to the cloud images' night-sky tone so the strips have no visible seam */
  --bg-2:#0c0e17;
  --gold:#e6c178;
  --gold-bright:#f1d293;
  --cream:#f3ede1;
  --text:#aca695;
  --muted:#928c7c;
  --line:rgba(230,193,120,.16);
  --line-soft:rgba(243,237,225,.09);
  --panel:rgba(13,15,23,.62);
  --serif:'Cormorant Garamond',ui-serif,Georgia,serif;
  --sans:'Inter',ui-sans-serif,system-ui,-apple-system,sans-serif;
  --mono:'JetBrains Mono',ui-monospace,'SF Mono',Menlo,monospace;
  --wrap:1160px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--text);
  font-family:var(--sans);font-size:16px;line-height:1.7;
  -webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
img,svg{display:block}
::selection{background:rgba(230,193,120,.28);color:#fff}

/* focus — keyboard navigable, on-brand */
:where(a,button,[tabindex]):focus-visible{
  outline:2px solid var(--gold-bright);outline-offset:3px;border-radius:7px;
}
.skip{position:fixed;top:-60px;left:14px;z-index:200;background:var(--gold);color:#1a1306;
  font-family:var(--sans);font-weight:600;font-size:.85rem;padding:10px 16px;border-radius:9px;
  transition:top .2s}
.skip:focus{top:14px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;
  clip:rect(0,0,0,0);white-space:nowrap;border:0}

.wrap{max-width:var(--wrap);margin:0 auto;padding:0 28px;position:relative;z-index:2}

/* ── shared type ─────────────────────────────────────────────────── */
.kicker{
  font-family:var(--sans);font-size:.72rem;font-weight:500;
  letter-spacing:.26em;text-transform:uppercase;color:var(--gold);
  margin:0 0 1.4rem;opacity:.92;
}
.display{
  font-family:var(--serif);font-weight:500;color:var(--cream);
  font-size:clamp(3.4rem,9vw,7rem);line-height:.74;letter-spacing:-.02em;margin:0;
}
.display em,.display2 em{font-style:italic;font-weight:500;color:var(--gold)}
.display em{font-size:1.05em;text-shadow:0 0 34px rgba(230,193,120,.32)}
.display2{
  font-family:var(--serif);font-weight:500;color:var(--cream);
  font-size:clamp(2.2rem,5vw,3.6rem);line-height:1.05;letter-spacing:-.015em;margin:0 0 1.3rem;
}
code{
  font-family:var(--mono);font-size:.85em;color:var(--gold-bright);
  background:rgba(230,193,120,.09);border:1px solid var(--line);
  border-radius:5px;padding:.06em .42em;
}

/* ── starfield + film grain (continuity + painterly surface) ─────── */
.stars{
  position:fixed;inset:0;pointer-events:none;z-index:1;opacity:.55;
  background-image:
    radial-gradient(1px 1px at 20% 30%,rgba(243,237,225,.9),transparent),
    radial-gradient(1px 1px at 70% 18%,rgba(230,193,120,.8),transparent),
    radial-gradient(1px 1px at 40% 72%,rgba(243,237,225,.7),transparent),
    radial-gradient(1.5px 1.5px at 85% 58%,rgba(230,193,120,.6),transparent),
    radial-gradient(1px 1px at 55% 45%,rgba(243,237,225,.6),transparent),
    radial-gradient(1px 1px at 12% 82%,rgba(243,237,225,.5),transparent),
    radial-gradient(1px 1px at 92% 86%,rgba(230,193,120,.5),transparent);
  background-repeat:no-repeat;
  animation:twinkle 6s ease-in-out infinite;
}
@keyframes twinkle{0%,100%{opacity:.4}50%{opacity:.66}}
.grain{
  position:fixed;inset:0;pointer-events:none;z-index:4;opacity:.045;mix-blend-mode:overlay;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ── nav ─────────────────────────────────────────────────────────── */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:50;
  display:flex;align-items:center;justify-content:space-between;
  padding:18px clamp(20px,4vw,46px);
  transition:background .4s ease,backdrop-filter .4s ease,border-color .4s ease;
  border-bottom:1px solid transparent;
}
.nav.scrolled{
  background:rgba(8,9,16,.74);backdrop-filter:blur(14px) saturate(140%);
  border-bottom:1px solid var(--line-soft);
}
.brand{display:inline-flex;align-items:center;gap:10px;font-family:var(--serif);
  font-size:1.32rem;color:var(--cream);font-weight:500;letter-spacing:.01em}
.brand .mark{filter:drop-shadow(0 0 8px rgba(230,193,120,.28))}
.nav-links{display:flex;align-items:center;gap:30px}
.nav-links a{font-size:.86rem;color:var(--text);transition:color .2s;letter-spacing:.01em}
.nav-links a:hover{color:var(--cream)}
.nav-gh{color:var(--gold)!important}
.nav-gh:hover{color:var(--gold-bright)!important}
.nav-links a.nav-spec{display:inline-flex;align-items:center;gap:7px;font-size:.82rem;font-weight:500;
  color:var(--cream);border:1px solid var(--line);background:rgba(243,237,225,.1);
  -webkit-backdrop-filter:blur(9px) saturate(135%);backdrop-filter:blur(9px) saturate(135%);
  border-radius:8px;padding:6px 8px 6px 13px;letter-spacing:.01em;transition:all .2s}
.nav-links a.nav-spec:hover{color:var(--cream);border-color:var(--gold);
  background:rgba(230,193,120,.14);transform:translateY(-1px)}

/* ── hero ────────────────────────────────────────────────────────── */
.hero{position:relative;min-height:100svh;display:flex;align-items:flex-end;
  overflow:hidden;padding:0 0 clamp(78px,13vh,160px);scroll-margin-top:80px}
.hero-bg{position:absolute;inset:-6% 0 0;background-size:cover;background-position:42% 42%;
  z-index:0;will-change:transform;transform:scale(1.04)}
.hero-veil{position:absolute;inset:0;z-index:1;
  background:
    linear-gradient(90deg,rgba(7,8,14,.93) 0%,rgba(7,8,14,.74) 44%,rgba(7,8,14,.2) 78%,transparent 100%),
    linear-gradient(0deg,var(--bg) 1%,rgba(10,11,18,.5) 32%,transparent 64%);
}
.hero-inner{width:100%}
.hero .display{margin:.18em 0 0;text-shadow:0 2px 40px rgba(0,0,0,.5)}
.hero-what{font-family:var(--serif);font-weight:500;color:var(--cream);
  font-size:clamp(1.4rem,2.5vw,1.95rem);line-height:1.25;margin:1.1rem 0 0;
  text-shadow:0 1px 24px rgba(0,0,0,.5)}
.hero-what b{color:var(--gold);font-weight:500;font-style:italic}
.lede{max-width:43ch;font-size:clamp(1rem,1.4vw,1.12rem);line-height:1.62;
  color:#d6d0c4;margin:1.3rem 0 0;text-shadow:0 1px 22px rgba(0,0,0,.5)}

/* terminal */
.install{margin:2.2rem 0 0;max-width:560px}
.cmd{display:flex;align-items:center;gap:12px;padding:13px 13px 13px 16px;border-radius:11px;
  background:rgba(10,11,18,.74);border:1px solid var(--line);
  box-shadow:0 18px 50px rgba(0,0,0,.45),inset 0 1px 0 rgba(255,255,255,.04);backdrop-filter:blur(10px)}
.cmd-text{flex:1;min-width:0;font-family:var(--mono);font-size:.84rem;color:#dcd6c9;
  overflow-x:auto;white-space:nowrap;scrollbar-width:none}
.cmd-text::-webkit-scrollbar{display:none}
.cmd-text .pr{color:var(--gold);margin-right:8px;user-select:none}
.copy{flex:none;font-family:var(--sans);font-size:.74rem;font-weight:500;
  color:var(--text);background:rgba(243,237,225,.06);border:1px solid var(--line-soft);
  border-radius:7px;padding:6px 13px;cursor:pointer;transition:all .2s;letter-spacing:.02em}
.copy:hover{color:var(--cream);border-color:var(--line);background:rgba(230,193,120,.1)}
.copy.done{color:var(--gold-bright);border-color:rgba(230,193,120,.42)}
.agent{display:inline-flex;align-items:baseline;gap:8px;margin:13px 2px 0;padding:0;
  background:none;border:0;cursor:pointer;font-family:var(--mono);font-size:.75rem;
  color:var(--muted);transition:color .2s}
.agent:hover{color:var(--cream)}
.agent-sub{color:var(--gold)}
.agent:hover .agent-sub{color:var(--gold-bright)}
.agent.done .agent-sub{color:var(--gold-bright)}

.hero-cta{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin:1.8rem 0 0}
.btn{display:inline-flex;align-items:center;gap:8px;font-size:.88rem;font-weight:500;
  padding:11px 20px;border-radius:9px;transition:all .22s;letter-spacing:.01em}
.btn-ghost{color:var(--cream);border:1px solid var(--line);background:rgba(243,237,225,.03)}
.btn-ghost:hover{border-color:var(--gold);background:rgba(230,193,120,.08);transform:translateY(-1px)}
.badge-mit{font-family:var(--mono);font-size:.72rem;letter-spacing:.08em;color:var(--muted)}
/* version chip — in the "Read the spec" button + the docs topbar */
.ver{display:inline-flex;align-items:center;font-family:var(--mono);font-size:.72em;font-weight:500;
  letter-spacing:.02em;color:var(--gold-bright);background:rgba(230,193,120,.12);
  border:1px solid var(--line);border-radius:999px;padding:.18em .62em;line-height:1}
.btn-spec{padding-right:13px}
.btn-spec .ver{margin-left:3px}

.scroll-hint{position:absolute;left:50%;bottom:22px;transform:translateX(-50%);z-index:3;
  display:flex;flex-direction:column;align-items:center;gap:7px;color:var(--muted);
  font-family:var(--mono);font-size:.66rem;letter-spacing:.22em;text-transform:uppercase}
.scroll-hint svg{animation:bob 2.2s ease-in-out infinite;color:var(--gold)}
@keyframes bob{0%,100%{transform:translateY(0)}50%{transform:translateY(5px)}}

/* ── bands (content sections) ────────────────────────────────────── */
/* Tall sections so the horizon strip (clouds/glow live along the image's bottom
   edge) grounds each one, with dark starry sky above for the content. */
.band{position:relative;padding:clamp(88px,11vh,140px) 0 clamp(210px,27vh,360px);
  overflow:hidden;scroll-margin-top:74px}
/* Each section's artwork is a bottom-anchored strip sized to the image's own
   aspect (full width, no crop). Top + bottom edges are feathered with a mask so
   it dissolves into the page instead of cutting; a faint gold rule (.band::after)
   marks the horizon at its base. */
.band-bg{position:absolute;left:0;right:0;bottom:0;height:auto;aspect-ratio:var(--ar,4.4);
  background-size:cover;background-position:center;background-repeat:no-repeat;z-index:0;opacity:.95;
  -webkit-mask-image:linear-gradient(180deg,transparent 0,#000 12px,#000 calc(100% - 10px),transparent 100%);
  mask-image:linear-gradient(180deg,transparent 0,#000 12px,#000 calc(100% - 10px),transparent 100%)}
.band-alt .band-bg{opacity:.92}
#layers .band-bg{--ar:4.63}
#modules .band-bg{--ar:4.24}
#sharing .band-bg{--ar:3.01}
/* Dark at the top for legible content; clear over the cloud horizon at the bottom. */
.band::before{content:"";position:absolute;inset:0;z-index:1;
  background:linear-gradient(180deg,
    var(--bg) 0%, var(--bg) 13%,
    rgba(10,11,18,.62) 30%, rgba(10,11,18,.14) 52%,
    transparent 68%, transparent 100%);}
.band::after{content:"";position:absolute;left:0;right:0;bottom:0;z-index:2;height:1px;
  background:linear-gradient(90deg,transparent 4%,rgba(230,193,120,.62) 50%,transparent 96%);
  box-shadow:0 0 14px rgba(230,193,120,.2)}
/* a faint gold hairline-glow above each section head, instead of box borders */
.band-head::before,.split-text::before,.soon::before{content:"";display:block;width:60px;height:1px;
  margin:0 0 26px;background:linear-gradient(90deg,var(--gold),transparent)}
.soon::before{margin:0 auto 24px}

.band-head{max-width:780px}
.band-sub{font-size:clamp(1rem,1.4vw,1.12rem);line-height:1.72;color:var(--text);
  max-width:62ch;margin:0}
.band-sub.center{margin:0 auto}
.band-sub i{color:#cfc9bb;font-style:italic}

/* three layers */
.layers{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:62px}
.layer{position:relative;padding:34px 30px 36px;border-radius:16px;overflow:hidden;
  background:var(--panel);border:1px solid var(--line-soft);
  box-shadow:0 16px 50px rgba(0,0,0,.4);transition:transform .35s,border-color .35s,box-shadow .35s;
  backdrop-filter:blur(7px)}
.layer::after{content:"";position:absolute;inset:0;border-radius:16px;pointer-events:none;
  background:radial-gradient(70% 60% at 80% 0%,rgba(230,193,120,.16),transparent 70%);
  opacity:0;transition:opacity .4s}
.layer:hover{transform:translateY(-6px);border-color:var(--line);
  box-shadow:0 30px 74px rgba(0,0,0,.55)}
.layer:hover::after{opacity:1}
.layer-num{font-family:var(--serif);font-size:2.7rem;font-style:italic;color:var(--gold);
  line-height:1;margin-bottom:14px;transition:text-shadow .4s;position:relative;z-index:1}
.layer:hover .layer-num{text-shadow:0 0 26px rgba(230,193,120,.55)}
.layer h3{font-family:var(--serif);font-size:1.72rem;font-weight:500;color:var(--cream);
  margin:0 0 2px;position:relative;z-index:1}
.layer-tag{font-family:var(--mono);font-size:.68rem;letter-spacing:.14em;text-transform:uppercase;
  color:var(--gold);opacity:.85;margin:0 0 16px;position:relative;z-index:1}
.layer p:last-child{margin:0;font-size:.95rem;line-height:1.66;color:var(--text);position:relative;z-index:1}
.layer b{color:var(--cream);font-weight:600}
.layer i{color:#cfc9bb}

/* modules split */
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.split-text .kicker{margin-top:0}
.ticks{list-style:none;padding:0;margin:26px 0 0;display:grid;gap:13px}
.ticks li{position:relative;padding-left:26px;font-size:.95rem;color:var(--text)}
.ticks li::before{content:"";position:absolute;left:0;top:.62em;width:12px;height:12px;
  border-radius:3px;background:var(--gold);opacity:.9;box-shadow:0 0 12px rgba(230,193,120,.55)}
.codecard{border-radius:14px;overflow:hidden;border:1px solid var(--line);
  background:rgba(8,9,15,.84);box-shadow:0 26px 64px rgba(0,0,0,.55);backdrop-filter:blur(8px)}
.codecard-bar{padding:11px 16px;border-bottom:1px solid var(--line-soft);
  font-family:var(--mono);font-size:.74rem;color:var(--muted);background:rgba(255,255,255,.02)}
.code{margin:0;padding:24px 22px 26px;font-family:var(--mono);font-size:.92rem;
  line-height:1.85;color:#dcd6c9;white-space:pre;overflow-x:auto}
.c-kw{color:#cba0ee}.c-fn{color:var(--gold-bright)}.c-tag{color:#8ab0df}
.c-attr{color:#9ccaa9}.c-str{color:#eab974}
.code-note{font-size:.86rem;color:var(--muted);margin:16px 2px 0;font-style:italic}

/* sharing / soon */
.soon{max-width:760px;margin:0 auto;text-align:center}
.soon .kicker{display:block}
.soon-pill{display:inline-block;font-family:var(--mono);font-size:.7rem;letter-spacing:.14em;
  text-transform:uppercase;color:var(--gold);border:1px solid var(--line);
  background:rgba(230,193,120,.08);border-radius:999px;padding:5px 14px;margin:0 0 18px}
.soon .display2{margin-bottom:1.5rem}

/* ── footer ──────────────────────────────────────────────────────── */
.footer{position:relative;padding:clamp(82px,11vh,134px) 0 clamp(120px,18vh,210px);overflow:hidden;
  scroll-margin-top:74px}
.footer-bg{position:absolute;left:0;right:0;bottom:0;height:auto;aspect-ratio:var(--ar,4.18);
  background-size:cover;background-position:center;background-repeat:no-repeat;z-index:0;opacity:.95;
  -webkit-mask-image:linear-gradient(180deg,transparent 0,#000 12px,#000 100%);
  mask-image:linear-gradient(180deg,transparent 0,#000 12px,#000 100%)}
.footer::before{content:"";position:absolute;inset:0;z-index:1;
  background:linear-gradient(180deg,
    var(--bg) 0%, var(--bg) 15%, rgba(10,11,18,.58) 34%, rgba(10,11,18,.12) 56%,
    transparent 72%, transparent 100%)}
.footer-inner{display:grid;grid-template-columns:1.3fr 1fr;gap:50px;align-items:start}
.brand-lg{font-size:1.7rem}
.footer-tag{font-family:var(--serif);font-size:1.5rem;color:var(--gold);font-style:italic;
  margin:18px 0 16px}
.footer-name{max-width:50ch;font-size:.92rem;line-height:1.74;color:var(--muted)}
.footer-name i{color:var(--text);font-style:italic}
.footer-cols{display:flex;gap:60px;justify-content:flex-end}
.footer-col h4{font-family:var(--mono);font-size:.7rem;letter-spacing:.16em;text-transform:uppercase;
  color:var(--gold);margin:6px 0 16px;font-weight:500}
.footer-col a{display:block;font-size:.92rem;color:var(--text);margin-bottom:11px;transition:color .2s}
.footer-col a:hover{color:var(--cream)}
.footer-base{display:flex;justify-content:space-between;margin-top:60px;padding-top:24px;
  border-top:1px solid var(--line-soft);font-family:var(--mono);font-size:.74rem;
  letter-spacing:.06em;color:var(--muted)}

/* ── reveal-on-scroll ────────────────────────────────────────────── */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .9s cubic-bezier(.16,1,.3,1),transform .9s cubic-bezier(.16,1,.3,1)}
.reveal.in{opacity:1;transform:none}
.layer.reveal{transition-delay:var(--d,0s)}

/* ── responsive ──────────────────────────────────────────────────── */
@media(max-width:920px){
  .layers{grid-template-columns:1fr;gap:16px}
  .split{grid-template-columns:1fr;gap:34px}
  .footer-inner{grid-template-columns:1fr;gap:36px}
  .footer-cols{justify-content:flex-start;gap:48px}
  .hero-veil{background:
    linear-gradient(90deg,rgba(7,8,14,.92) 0%,rgba(7,8,14,.62) 62%,rgba(7,8,14,.32) 100%),
    linear-gradient(0deg,var(--bg) 2%,rgba(10,11,18,.5) 36%,transparent 68%)}
}
@media(max-width:680px){
  .nav-links{gap:16px}
  .nav-links a:not(.nav-gh):not(.nav-spec){display:none}
  .cmd-text{font-size:.76rem}
  .footer-base{flex-direction:column;gap:8px}
  .hero{padding-bottom:60px}
  .hero-cta{gap:11px}
  /* phones: shorter sections + a fuller cloud band (the natural strip is a thin
     line at this width, so use a taller aspect and let the sides crop) */
  .band{padding:58px 0 116px}
  .footer{padding:62px 0 100px}
  .band-bg,.footer-bg{--ar:1.8}
}
@media(prefers-reduced-motion:reduce){
  *{animation:none!important}
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
}