/* Radiant Atmospheres — base stylesheet (static shell, issue #20)
   Palette + type from the imported Claude Design (v2). Fonts self-hosted (§11);
   ponytail: woff2 files not yet in assets/fonts/ — falls back to system UI until added. */

/* ---- fonts (self-hosted; add the woff2 files to assets/fonts/) ---- */
@font-face { font-family:"Sora"; font-weight:300 800; font-display:swap;
  src:url("../fonts/Sora-variable.woff2") format("woff2"); }
@font-face { font-family:"Instrument Sans"; font-weight:400 500; font-display:swap;
  src:url("../fonts/InstrumentSans-variable.woff2") format("woff2"); }

:root {
  --bg:oklch(0.13 0.005 60);
  --bg-2:oklch(0.155 0.006 60);
  --line:oklch(0.24 0.005 60);
  --ink:oklch(0.95 0.004 80);
  --muted:oklch(0.68 0.008 70);
  --faint:oklch(0.6 0.008 70);
  --amber:oklch(0.82 0.15 75);
  --amber-hi:oklch(0.9 0.13 78);
  --salmon:oklch(0.74 0.14 25);
  --lime:oklch(0.82 0.16 130);
  --cyan:oklch(0.82 0.12 210);
  --sans:"Instrument Sans", system-ui, sans-serif;
  --display:"Sora", system-ui, sans-serif;
  --wrap:1240px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);
  -webkit-font-smoothing:antialiased;overflow-x:hidden;line-height:1.5}
img,video{max-width:100%;display:block}
a{color:var(--amber);text-decoration:none}
a:hover{color:var(--amber-hi)}
::selection{background:oklch(0.82 0.15 75 / 0.35)}
h1,h2,h3{font-family:var(--display);font-weight:300;letter-spacing:-0.02em;margin:0}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 48px}
.eyebrow{font-size:13px;letter-spacing:0.24em;text-transform:uppercase;color:var(--faint)}
.amber{color:var(--amber)} .italic{font-style:italic;font-weight:700}

/* ---- buttons ---- */
.btn{display:inline-block;padding:16px 34px;border-radius:100px;font-weight:600;font-size:16px;
  border:1px solid transparent;cursor:pointer;transition:background .2s,border-color .2s,color .2s}
.btn-primary{background:var(--amber);color:oklch(0.14 0.02 60)}
.btn-primary:hover{background:var(--amber-hi);color:oklch(0.14 0.02 60)}
.btn-ghost{border-color:oklch(0.85 0.08 78 / 0.5);color:var(--ink)}
.btn-ghost:hover{border-color:var(--amber);color:var(--amber)}

/* ---- header / footer ---- */
.site-header{position:sticky;top:0;z-index:50;display:flex;align-items:center;
  justify-content:space-between;padding:22px 48px;background:oklch(0.13 0.005 60 / 0.72);
  backdrop-filter:blur(18px);border-bottom:1px solid oklch(0.24 0.005 60 / 0.6)}
.brand{display:flex;align-items:center;gap:12px}
.brand .mark{width:40px;height:25px;background:var(--amber);animation:ra-pulse 5s ease-in-out infinite;
  -webkit-mask:url("../img/ra-sun.png") center/contain no-repeat;
  mask:url("../img/ra-sun.png") center/contain no-repeat}
.brand .name{font-family:var(--display);font-weight:700;font-size:14px;letter-spacing:0.18em;
  text-transform:uppercase;color:var(--ink)}
.nav{display:flex;gap:34px;align-items:center;font-size:15px}
.nav a{color:oklch(0.9 0.005 80)}
.nav a:hover,.nav a[aria-current="page"]{color:var(--amber)}
.nav-toggle{display:none;background:none;border:0;color:var(--ink);font-size:22px;cursor:pointer}

.site-footer{border-top:1px solid oklch(0.24 0.005 60 / 0.6);padding:44px 48px 40px;margin-top:80px}
.site-footer .row{max-width:var(--wrap);margin:0 auto;display:flex;align-items:center;
  justify-content:space-between;gap:24px;flex-wrap:wrap}
.site-footer .nav a{color:var(--muted);font-size:14px}
.copyright{font-size:13px;color:oklch(0.5 0.008 70)}

/* ---- hero (video-in-sun-logo) ---- */
.hero{position:relative;height:90vh;min-height:640px;overflow:hidden;
  background:radial-gradient(120% 100% at 50% 38%, oklch(0.17 0.015 250) 0%, #06060a 62%)}
.hero .sun{position:absolute;top:38%;left:50%;transform:translate(-50%,-50%);
  width:min(94vw,1400px);height:min(58vw,865px);pointer-events:none;
  filter:drop-shadow(0 0 70px oklch(0.82 0.15 75 / 0.45));
  -webkit-mask:url("../img/ra-sun.png") center/contain no-repeat;
  mask:url("../img/ra-sun.png") center/contain no-repeat}
.hero .sun video,.hero .sun .fallback{width:100%;height:100%;object-fit:cover;
  animation:ra-float 8s ease-in-out infinite}
.hero .sun .fallback{background:
  radial-gradient(circle at 50% 45%, var(--amber), oklch(0.74 0.13 25) 55%, oklch(0.4 0.08 60) 100%)}
.hero .fade{position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,transparent 56%,var(--bg) 100%)}
.hero .content{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;
  justify-content:flex-end;text-align:center;padding:0 40px 8vh}
.hero h1{font-size:clamp(46px,7.5vw,102px);line-height:0.94;text-shadow:0 0 70px oklch(0.82 0.15 75 / 0.3)}
.hero p{max-width:52ch;font-size:19px;line-height:1.6;color:oklch(0.84 0.01 80);margin:28px 0 0}
.hero .cta{display:flex;gap:16px;margin-top:36px;flex-wrap:wrap;justify-content:center}
.hero .tagline{font-size:13px;letter-spacing:0.34em;color:oklch(0.86 0.1 78);
  text-transform:uppercase;margin-bottom:20px}

/* ---- sections / cards ---- */
.section{max-width:var(--wrap);margin:0 auto;padding:96px 48px}
.manifesto{max-width:1080px;font-family:var(--display);font-weight:300;
  font-size:clamp(28px,3.6vw,46px);line-height:1.28;text-wrap:balance;color:oklch(0.9 0.01 78)}
.grid-cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:20px}
.card{position:relative;display:block;aspect-ratio:3/2;border-radius:14px;overflow:hidden;
  background:radial-gradient(120% 120% at 30% 20%, oklch(0.24 0.03 72), oklch(0.14 0.008 260) 70%);
  transition:transform .25s ease}
.card:hover{transform:translateY(-4px)}
.card img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.card .shade{position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,transparent 45%,oklch(0.08 0.005 60 / 0.9) 100%)}
.card .label{position:absolute;left:20px;right:20px;bottom:16px}
.card .label .t{font-family:var(--display);font-weight:600;font-size:22px;color:var(--ink);
  text-transform:uppercase;letter-spacing:0.04em}
.card .label .y{font-size:12.5px;color:oklch(0.8 0.06 72);margin-top:3px}
.cat-head{display:flex;align-items:baseline;gap:18px;margin:0 0 22px}
.cat-head h2{font-size:15px;letter-spacing:0.28em;text-transform:uppercase;font-weight:600;
  font-family:var(--display);white-space:nowrap}
.cat-head .rule{flex:1;height:1px;background:linear-gradient(90deg,oklch(0.4 0.05 72),var(--line))}

/* ---- reveal on scroll ---- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}

/* ---- forms ---- */
.field{display:block;margin-bottom:20px}
.field span{display:block;font-size:13px;color:var(--muted);margin-bottom:8px}
.field input,.field select,.field textarea{width:100%;padding:14px 16px;border-radius:12px;
  background:oklch(0.12 0.005 60);border:1px solid oklch(0.28 0.005 60);color:var(--ink);
  font-size:15px;font-family:inherit}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--amber)}

/* ---- focus visibility (a11y) ---- */
:focus-visible{outline:2px solid var(--amber);outline-offset:3px;border-radius:4px}

@keyframes ra-float{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}
@keyframes ra-rays{from{transform:translate(-50%,-50%) rotate(0)}to{transform:translate(-50%,-50%) rotate(360deg)}}

/* slowly-rotating conic "rays" backdrop (from the design's invitation section) */
.rays{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);
  width:1200px;height:1200px;pointer-events:none;opacity:0.28;border-radius:50%;
  animation:ra-rays 300s linear infinite;
  background:repeating-conic-gradient(from 0deg at 50% 50%, oklch(0.82 0.15 75 / 0.5) 0deg 1.4deg, transparent 1.4deg 13deg);
  -webkit-mask:radial-gradient(circle at 50% 50%, #000 4%, transparent 60%);
  mask:radial-gradient(circle at 50% 50%, #000 4%, transparent 60%)}
.invite{position:relative;overflow:hidden}
.invite > *{position:relative}
.invite > .rays{position:absolute}
@keyframes ra-pulse{0%,100%{opacity:.5}50%{opacity:1}}

/* disciplines: text column + sticky tall image */
.disc-grid{display:grid;grid-template-columns:1fr 0.85fr;gap:64px;align-items:start}
.disc-item{display:grid;grid-template-columns:56px 1fr;gap:20px;padding:34px 0;border-top:1px solid var(--line)}
.disc-item .no{font-family:var(--display);font-weight:300;font-size:22px}
.disc-item h3{font-weight:600;font-size:26px;margin:0 0 10px}
.disc-item p{font-size:16px;line-height:1.65;color:var(--muted);margin:0;max-width:46ch}
.disc-img{position:sticky;top:100px;border-radius:20px;overflow:hidden;aspect-ratio:3/4;
  background:radial-gradient(120% 120% at 30% 20%, oklch(0.24 0.03 72), oklch(0.14 0.008 260) 70%)}

/* signature techniques grid */
.tech-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--line);
  border:1px solid var(--line);border-radius:20px;overflow:hidden}
.tech-cell{background:oklch(0.135 0.005 60);padding:40px 38px 44px;transition:background .2s}
.tech-cell:hover{background:oklch(0.16 0.006 60)}
.tech-cell .era{font-family:var(--display);font-size:13px;letter-spacing:0.12em;text-transform:uppercase;margin-bottom:20px}
.tech-cell h3{font-weight:600;font-size:24px;margin:0 0 12px}
.tech-cell p{font-size:15px;line-height:1.65;color:var(--muted);margin:0;max-width:44ch}

/* featured bento */
.featured-head{display:flex;align-items:flex-end;justify-content:space-between;margin-bottom:40px;gap:16px}
.bento{display:grid;grid-template-columns:1.5fr 1fr;grid-template-rows:340px 240px;gap:16px}
.bento .cell{position:relative;border-radius:20px;overflow:hidden;
  background:radial-gradient(120% 120% at 30% 20%, oklch(0.24 0.03 72), oklch(0.14 0.008 260) 70%)}
.bento .cell.tall{grid-row:span 2}
.bento .cell .shade{position:absolute;inset:0;pointer-events:none;background:linear-gradient(180deg,transparent 46%,oklch(0.07 0.005 60 / 0.92) 100%)}
.bento .cell .label{position:absolute;left:24px;bottom:22px}
.bento .cell .label .t{font-family:var(--display);font-weight:600;font-size:22px}
.bento .cell .label .y{font-size:13px;margin-top:2px}

/* hero extras */
.hero .glow{position:absolute;inset:0;pointer-events:none;background:radial-gradient(80% 50% at 50% 80%, oklch(0.6 0.03 240 / 0.2) 0%, transparent 70%)}
.scroll-ind{position:absolute;bottom:26px;left:50%;transform:translateX(-50%);font-size:12px;letter-spacing:0.2em;color:var(--faint);animation:ra-pulse 3s ease-in-out infinite}

/* event / details page */
.event-hero{position:relative;height:78vh;min-height:560px;overflow:hidden;background:oklch(0.11 0.005 60)}
.event-hero .cover{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.event-hero .grad{position:absolute;inset:0;background:linear-gradient(180deg,oklch(0.11 0.005 60 / .3) 0%,transparent 30%,oklch(0.1 0.005 60 / .92) 100%)}
.event-hero .cap{position:absolute;left:0;right:0;bottom:0;padding:0 48px 48px;max-width:var(--wrap);margin:0 auto}
.event-hero h1{font-size:clamp(52px,9vw,120px);line-height:0.86;text-transform:uppercase;letter-spacing:0.03em}
.intro{display:grid;grid-template-columns:1.6fr 1fr;gap:64px;align-items:start}
.intro .lead{font-size:20px;line-height:1.7;font-weight:300;color:oklch(0.88 0.01 85);max-width:60ch;margin:0 0 22px}
.meta{border-top:1px solid oklch(0.3 0.02 72);padding-top:24px}
.meta div{display:flex;justify-content:space-between;gap:20px;padding:14px 0;border-bottom:1px solid oklch(0.2 0.005 60)}
.meta .k{font-size:12px;letter-spacing:0.22em;text-transform:uppercase;color:var(--faint)}
.masonry{columns:2 480px;column-gap:16px}
.masonry .tile{display:block;margin:0 0 16px;break-inside:avoid;border-radius:8px;overflow:hidden;aspect-ratio:3/2;
  background:radial-gradient(120% 120% at 30% 20%, oklch(0.24 0.03 72), oklch(0.14 0.008 260) 70%)}
.next-work{font-family:var(--display);font-weight:300;font-size:clamp(40px,6vw,80px);text-transform:uppercase;letter-spacing:0.05em}

/* ---- responsive ---- */
@media (max-width:820px){
  .wrap,.section{padding-left:22px;padding-right:22px}
  .site-header,.site-footer{padding-left:22px;padding-right:22px}
  .nav{position:fixed;inset:64px 0 auto 0;flex-direction:column;gap:0;background:var(--bg);
    border-bottom:1px solid var(--line);transform:translateY(-120%);transition:transform .25s ease}
  .nav.open{transform:none}
  .nav a{padding:16px 22px;width:100%}
  .nav-toggle{display:block}
  .section{padding-top:64px;padding-bottom:64px}
  .disc-grid{grid-template-columns:1fr;gap:32px}
  .disc-img{display:none}
  .tech-grid{grid-template-columns:1fr}
  .bento{grid-template-columns:1fr;grid-template-rows:none}
  .bento .cell{aspect-ratio:3/2}
  .bento .cell.tall{grid-row:auto}
  .intro{grid-template-columns:1fr;gap:32px}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  .hero .sun video,.hero .sun .fallback{animation:none}
  *{animation-duration:.001ms !important;animation-iteration-count:1 !important}
}