:root{
  --ink:#141312;
  --ink-2:#1E1C1A;
  --ink-3:#2A2724;
  --paper:#FAFAF9;
  --teal-900:#083F4A;
  --teal-700:#0B6B7B;
  --teal-500:#0E8496;
  --teal-300:#16A8B8;
  --gold-700:#A87423;
  --gold-500:#C08A2E;
  --gold-300:#E8B84B;
  --cream:#F5F1EA;
  --muted:#A29C92;
  --line:rgba(245,241,234,.12);
  --radius:20px;
  --serif:'Playfair Display',Georgia,serif;
  --sans:'Inter',system-ui,-apple-system,sans-serif;
  --ease:cubic-bezier(.22,.61,.36,1);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:
    radial-gradient(1100px 620px at 82% -8%, rgba(14,132,150,.18), transparent 60%),
    radial-gradient(760px 520px at 4% 12%, rgba(192,138,46,.10), transparent 62%),
    var(--ink);
  color:var(--cream);
  font-family:var(--sans);
  font-weight:300;
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3,h4{margin:0;font-weight:500;letter-spacing:-.02em;line-height:1.12}
p{margin:0}
a{color:inherit;text-decoration:none}
svg{display:block}
::selection{background:rgba(232,184,75,.3)}

/* ---------- nav ---------- */
.nav{
  position:sticky;top:0;z-index:50;
  display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding:14px clamp(20px,4vw,56px);
  background:rgba(20,19,18,.72);
  backdrop-filter:blur(18px) saturate(140%);
  border-bottom:1px solid var(--line);
}
.brand{display:flex;align-items:center;gap:11px;font-size:14px;letter-spacing:.14em;text-transform:uppercase}
.brand-mark{width:26px;height:26px;transition:transform .5s var(--ease)}
.brand:hover .brand-mark{transform:rotate(-8deg) scale(1.06)}
.brand em{font-style:normal;color:var(--gold-300);margin-left:6px;letter-spacing:.1em}
.nav-links{display:flex;gap:28px;font-size:13.5px;color:var(--muted)}
.nav-links a{position:relative;padding:4px 0;transition:color .25s}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:1px;
  background:var(--gold-500);transform:scaleX(0);transform-origin:left;
  transition:transform .35s var(--ease);
}
.nav-links a:hover{color:var(--cream)}
.nav-links a:hover::after{transform:scaleX(1)}
.btn-ghost{
  display:inline-flex;align-items:center;gap:7px;font-size:13px;
  padding:8px 15px;border:1px solid var(--line);border-radius:99px;
  color:var(--cream);transition:border-color .25s,background .25s;
}
.btn-ghost:hover{border-color:rgba(232,184,75,.55);background:rgba(232,184,75,.08)}
.btn-ghost svg,.btn svg,.btn-line svg{width:15px;height:15px}

/* ---------- shared ---------- */
.eyebrow{
  font-size:11.5px;letter-spacing:.24em;text-transform:uppercase;
  color:var(--gold-300);margin-bottom:16px;
}
.sec-head{max-width:720px;margin:0 auto clamp(38px,5vw,62px);text-align:center}
.sec-head h2{font-family:var(--serif);font-size:clamp(1.9rem,3.6vw,3rem);font-weight:500}
.sec-sub{margin-top:16px;color:var(--muted);font-size:15.5px;line-height:1.7}
.serif-i{font-family:var(--serif);font-style:italic;color:var(--gold-300)}

/* ---------- hero ---------- */
.hero{
  display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(30px,5vw,72px);
  align-items:center;
  padding:clamp(56px,7vw,104px) clamp(20px,5vw,72px) clamp(56px,7vw,90px);
  max-width:1320px;margin:0 auto;
}
.hero h1{
  font-family:var(--serif);font-weight:500;
  font-size:clamp(2.4rem,5vw,4.1rem);line-height:1.06;letter-spacing:-.025em;
}
.lede{margin-top:26px;max-width:52ch;color:#CFC8BC;font-size:16px;line-height:1.75}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px}
.btn{
  display:inline-flex;align-items:center;gap:9px;
  padding:13px 22px;border-radius:99px;font-size:14px;font-weight:400;
  color:var(--ink);
  background:linear-gradient(135deg,var(--gold-300),var(--gold-500));
  box-shadow:0 10px 28px -10px rgba(192,138,46,.7);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease);
}
.btn:hover{transform:translateY(-2px);box-shadow:0 16px 34px -12px rgba(192,138,46,.85)}
.btn-line{
  display:inline-flex;align-items:center;gap:9px;
  padding:13px 22px;border-radius:99px;font-size:14px;
  border:1px solid rgba(245,241,234,.22);
  transition:border-color .3s,background .3s,transform .3s var(--ease);
}
.btn-line:hover{transform:translateY(-2px);border-color:rgba(245,241,234,.45);background:rgba(245,241,234,.05)}
.swatches{display:flex;align-items:center;gap:9px;margin-top:34px}
.sw{
  width:26px;height:26px;border-radius:50%;border:none;cursor:pointer;
  background:var(--c);box-shadow:0 0 0 1px rgba(255,255,255,.14) inset;
  transition:transform .28s var(--ease);
}
.sw:hover{transform:translateY(-3px) scale(1.1)}
.sw-note{font-size:11.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--muted);margin-left:8px}

/* ---------- hero stage ---------- */
.hero-stage{position:relative;display:flex;flex-direction:column;align-items:center;gap:18px}
.stage-glow{
  position:absolute;inset:6% 10%;border-radius:50%;
  background:radial-gradient(circle at 50% 45%, rgba(22,168,184,.34), rgba(192,138,46,.12) 45%, transparent 68%);
  filter:blur(38px);z-index:0;
}
.stage-card{
  position:relative;z-index:1;width:100%;aspect-ratio:1/1;max-width:420px;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:20px;
  border-radius:32px;
  background:linear-gradient(160deg, rgba(255,255,255,.09), rgba(255,255,255,.03));
  border:1px solid rgba(255,255,255,.10);
  backdrop-filter:blur(14px);
  box-shadow:0 40px 90px -50px rgba(0,0,0,.9), inset 0 1px 0 rgba(255,255,255,.12);
  animation:floaty 9s ease-in-out infinite;
}
.stage-mark{width:62%;filter:drop-shadow(0 18px 34px rgba(0,0,0,.5))}
.stage-cap{font-size:12.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
.stage-cap strong{color:var(--cream);font-weight:500}
.stage-tags{display:flex;gap:8px;flex-wrap:wrap;justify-content:center;z-index:1}
.stage-tags span{
  font-size:11px;letter-spacing:.14em;text-transform:uppercase;
  padding:6px 12px;border-radius:99px;
  border:1px solid rgba(232,184,75,.35);color:var(--gold-300);
  background:rgba(232,184,75,.07);
}
@keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-12px)}}

/* ---------- concepts ---------- */
.marks{padding:clamp(40px,6vw,90px) clamp(20px,5vw,72px);max-width:1280px;margin:0 auto}
.concept{
  display:grid;grid-template-columns:1fr 1.15fr;gap:clamp(26px,4vw,58px);
  align-items:center;padding:clamp(28px,3vw,44px) 0;
  border-top:1px solid var(--line);
}
.concept:first-of-type{border-top:none}
.concept-plate{
  position:relative;background:var(--paper);border-radius:var(--radius);
  padding:clamp(26px,3.4vw,48px) clamp(22px,3vw,40px);
  box-shadow:0 30px 70px -46px rgba(0,0,0,.9);
  display:flex;flex-direction:column;align-items:center;gap:26px;
  transition:transform .5s var(--ease),box-shadow .5s var(--ease);
}
.concept:hover .concept-plate{transform:translateY(-5px);box-shadow:0 44px 84px -46px rgba(0,0,0,1)}
.plate-num{
  position:absolute;top:16px;left:20px;
  font-size:11px;letter-spacing:.2em;color:#9A948B;
}
.concept-mark{width:min(210px,58%);transition:transform .6s var(--ease)}
.concept:hover .concept-mark{transform:scale(1.04)}
.size-run{display:flex;align-items:flex-end;gap:18px;padding-top:6px;border-top:1px solid #E7E4DE;width:100%;justify-content:center}
.size-run svg{opacity:.9}

.concept-body h3{font-family:var(--serif);font-size:clamp(1.5rem,2.4vw,2.05rem);display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.concept-line{margin-top:10px;color:var(--gold-300);font-size:14.5px;letter-spacing:.01em}
.concept-body p{margin-top:16px;color:#C9C2B6;font-size:15px;line-height:1.75;max-width:56ch}
.concept-body p.muted{color:#938D83;font-size:14px}
.pill{
  font-family:var(--sans);font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;
  padding:5px 11px;border-radius:99px;font-weight:500;
  background:rgba(232,184,75,.14);color:var(--gold-300);
  border:1px solid rgba(232,184,75,.3);
}
.traits{list-style:none;padding:0;margin:22px 0 0;display:flex;flex-wrap:wrap;gap:8px}
.traits li{
  font-size:12px;color:#B7B0A5;padding:7px 13px;border-radius:8px;
  background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.07);
}

/* ---------- studio ---------- */
.context{padding:clamp(50px,7vw,100px) clamp(20px,5vw,72px);max-width:1180px;margin:0 auto}
.studio{
  border-radius:26px;overflow:hidden;
  border:1px solid rgba(255,255,255,.09);
  background:rgba(255,255,255,.03);
}
.studio-bar{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding:14px 18px;border-bottom:1px solid rgba(255,255,255,.08);
  background:rgba(255,255,255,.02);
}
.tabs{display:flex;gap:6px;flex-wrap:wrap}
.tab{
  cursor:pointer;border:none;background:transparent;color:var(--muted);
  font-family:var(--sans);font-size:12.5px;padding:8px 14px;border-radius:99px;
  transition:color .25s,background .25s;
}
.tab:hover{color:var(--cream);background:rgba(255,255,255,.06)}
.tab.is-active{background:var(--cream);color:var(--ink);font-weight:500}
.bgs{display:flex;gap:7px}
.bg-btn{
  width:28px;height:28px;padding:3px;border-radius:50%;cursor:pointer;
  background:transparent;border:1px solid rgba(255,255,255,.18);
  transition:border-color .25s,transform .25s var(--ease);
}
.bg-btn span{display:block;width:100%;height:100%;border-radius:50%}
.bg-btn:hover{transform:scale(1.1)}
.bg-btn.is-active{border-color:var(--gold-300);box-shadow:0 0 0 2px rgba(232,184,75,.2)}

.stage{
  position:relative;min-height:clamp(300px,44vw,460px);
  display:flex;align-items:center;justify-content:center;padding:clamp(26px,4vw,54px);
  transition:background .55s var(--ease);
  background:#FAFAF9;
}
.stage[data-bg="dark"]{background:#141312}
.stage[data-bg="teal"]{background:#0B6B7B}
.stage[data-bg="gold"]{background:#E8DFCF}
.stage-inner{display:flex;align-items:center;gap:clamp(18px,3vw,36px);flex-wrap:wrap;justify-content:center}
.stage-big{width:clamp(110px,20vw,180px);transition:opacity .35s,transform .45s var(--ease)}
.stage-lockup{display:flex;flex-direction:column;gap:6px;border-left:1px solid rgba(0,0,0,.20);padding-left:clamp(18px,3vw,30px)}
.stage[data-bg="dark"] .stage-lockup,.stage[data-bg="teal"] .stage-lockup{border-color:rgba(255,255,255,.24)}
.lockup-name{font-size:clamp(15px,2.2vw,21px);letter-spacing:.3em;font-weight:600;color:#141312;transition:color .5s}
.lockup-sub{font-size:10.5px;letter-spacing:.24em;text-transform:uppercase;color:#7A7368;transition:color .5s}
.stage[data-bg="dark"] .lockup-name,.stage[data-bg="teal"] .lockup-name{color:#F5F1EA}
.stage[data-bg="dark"] .lockup-sub,.stage[data-bg="teal"] .lockup-sub{color:rgba(245,241,234,.62)}
.studio-note{font-size:12.5px;color:#8A8478;padding:14px 18px;border-top:1px solid rgba(255,255,255,.07)}

/* ---------- palette ---------- */
.palette-sec{padding:clamp(50px,7vw,100px) clamp(20px,5vw,72px);max-width:1180px;margin:0 auto}
.palette-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}
.chip{
  cursor:pointer;text-align:left;border:1px solid rgba(255,255,255,.09);
  background:rgba(255,255,255,.03);border-radius:16px;padding:0 0 16px;overflow:hidden;
  display:flex;flex-direction:column;gap:4px;
  font-family:var(--sans);color:var(--cream);
  transition:transform .35s var(--ease),border-color .35s;
}
.chip::before{
  content:"";display:block;height:74px;width:100%;
  background:linear-gradient(140deg,var(--c),color-mix(in srgb,var(--c) 70%,#000));
  margin-bottom:14px;
}
.chip b{font-size:13.5px;font-weight:500;padding:0 14px}
.chip code{font-size:11.5px;color:var(--gold-300);padding:0 14px;letter-spacing:.06em}
.chip em{font-style:normal;font-size:11px;color:#8A8478;padding:2px 14px 0;line-height:1.5}
.chip:hover{transform:translateY(-4px);border-color:rgba(232,184,75,.4)}

/* ---------- rules ---------- */
.rules{padding:clamp(50px,7vw,100px) clamp(20px,5vw,72px);max-width:1180px;margin:0 auto}
.rule-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.rule-card{
  border:1px solid rgba(255,255,255,.09);border-radius:20px;padding:24px;
  background:linear-gradient(165deg,rgba(255,255,255,.05),rgba(255,255,255,.02));
  transition:transform .4s var(--ease),border-color .4s;
}
.rule-card:hover{transform:translateY(-4px);border-color:rgba(232,184,75,.28)}
.rule-card h4{font-size:15px;margin-top:18px;letter-spacing:-.01em}
.rule-card p{margin-top:8px;font-size:13.5px;color:#A9A296;line-height:1.65}
.rule-card strong{color:var(--gold-300);font-weight:500}
.rule-demo{
  height:132px;border-radius:14px;background:var(--paper);
  display:flex;align-items:center;justify-content:center;gap:14px;padding:14px;
}
.clearspace{
  position:relative;width:100px;height:100px;
  border:1px dashed rgba(20,19,18,.28);border-radius:8px;
  display:flex;align-items:center;justify-content:center;
}
.clearspace svg{width:56px;height:56px}
.cs-x{position:absolute;top:-9px;left:50%;transform:translateX(-50%);background:var(--paper);padding:0 4px;font-size:10px;color:#8A8478}
.sizes-demo{gap:20px}
.min-item{display:flex;flex-direction:column;align-items:center;gap:7px}
.min-item span{font-size:9.5px;letter-spacing:.08em;color:#8A8478;text-transform:uppercase}
.mono-demo{gap:10px}
.mono-tile{width:88px;height:88px;border-radius:10px;display:flex;align-items:center;justify-content:center}
.mono-tile.light{background:#FAFAF9;border:1px solid #E7E4DE}
.mono-tile.dark{background:#141312}
.mono-tile svg{width:48px;height:48px}
.mono-tile.light svg{filter:brightness(0)}
.mono-tile.dark svg{filter:brightness(0) invert(1)}

.donts{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.dont{
  display:inline-flex;align-items:center;gap:8px;font-size:12.5px;color:#A9A296;
  padding:9px 15px;border-radius:99px;
  border:1px solid rgba(255,255,255,.08);background:rgba(255,255,255,.02);
}
.dont svg{width:13px;height:13px;color:#B4553F}

/* ---------- footer ---------- */
.foot{
  margin-top:40px;padding:clamp(40px,6vw,64px) clamp(20px,5vw,72px);
  border-top:1px solid var(--line);text-align:center;
  display:flex;flex-direction:column;align-items:center;gap:14px;
}
.foot-mark{width:44px;height:44px;opacity:.9}
.foot p{font-size:13.5px;color:#8A8478;max-width:56ch}
.foot-meta{font-size:11.5px;letter-spacing:.06em;color:#6C665D}
.foot code{font-size:11.5px;color:var(--gold-300);background:rgba(232,184,75,.08);padding:2px 7px;border-radius:5px}

/* ---------- toast ---------- */
.toast{
  position:fixed;left:50%;bottom:28px;transform:translate(-50%,26px);
  display:flex;align-items:center;gap:9px;
  padding:11px 20px;border-radius:99px;font-size:13px;
  background:var(--cream);color:var(--ink);font-weight:500;
  box-shadow:0 18px 40px -18px rgba(0,0,0,.8);
  opacity:0;pointer-events:none;transition:opacity .35s,transform .45s var(--ease);
  z-index:90;
}
.toast svg{width:15px;height:15px;color:var(--teal-700)}
.toast.show{opacity:1;transform:translate(-50%,0)}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media (max-width:960px){
  .hero{grid-template-columns:1fr;text-align:left}
  .hero-stage{order:-1;max-width:400px;margin:0 auto}
  .concept{grid-template-columns:1fr}
  .palette-grid{grid-template-columns:repeat(2,1fr)}
  .rule-grid{grid-template-columns:1fr}
  .nav-links{display:none}
}
@media (max-width:560px){
  .palette-grid{grid-template-columns:1fr}
  .size-run{gap:12px}
  .stage-lockup{padding-left:16px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
}