/* base.css — film-paper & ink tokens, serif typography, grain */
:root{
  --paper:#f2ebdd;--paper-2:#e8dcc6;--paper-3:#dccdb1;
  --ink:#1c1814;--ink-2:#2b251f;--ink-3:#4a4036;--muted:#7b6f5f;
  --amber:#c27a12;--amber-hi:#e8a33a;--amber-soft:rgba(194,122,18,.14);
  --line:rgba(28,24,20,.16);--line-soft:rgba(28,24,20,.08);
  --serif:"Songti SC","STSong","Noto Serif CJK SC","Source Han Serif SC","Noto Serif SC",Georgia,"Times New Roman",serif;
  --display:"Didot","Bodoni 72","Playfair Display",Georgia,"Songti SC","Noto Serif CJK SC",serif;
  --sans:-apple-system,BlinkMacSystemFont,"PingFang SC","Helvetica Neue","Noto Sans CJK SC",sans-serif;
  --mono:"SF Mono","Menlo","Courier New",monospace;
  --ease:cubic-bezier(.19,1,.22,1);--ease-io:cubic-bezier(.77,0,.18,1);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;background:var(--paper)}
body{background:var(--paper);color:var(--ink);font-family:var(--serif);line-height:1.6;-webkit-font-smoothing:antialiased;overflow-x:hidden;position:relative}
main,.credits{position:relative;z-index:1}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button,input,select{font:inherit;color:inherit}
::selection{background:var(--amber-hi);color:var(--ink)}
.kicker{font-family:var(--mono);font-size:11px;letter-spacing:.22em;text-transform:uppercase;color:var(--amber)}
.sec-head{max-width:1180px;margin:0 auto;padding:140px 28px 56px;position:relative}
.sec-head::before{content:"";position:absolute;left:28px;right:28px;top:96px;border-top:1px solid var(--line)}
.sec-title{font-family:var(--serif);font-weight:900;font-size:clamp(44px,7.5vw,104px);line-height:1;letter-spacing:-.02em;margin-top:14px}
.sec-title em{font-family:var(--display);font-style:italic;font-weight:400;font-size:.42em;color:var(--amber);margin-left:.5em;letter-spacing:0;vertical-align:.35em}
.sec-title.light{color:var(--paper)}
.sec-sub{font-size:clamp(16px,1.6vw,20px);color:var(--muted);margin-top:18px;max-width:640px}
/* film grain */
.grain{position:fixed;inset:-50%;z-index:300;pointer-events:none;opacity:.11;mix-blend-mode:multiply;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='220' height='220'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0  0 0 0 0 0  0 0 0 0 0  0 0 0 .9 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
  animation:grain 1.2s steps(6) infinite}
@keyframes grain{0%{transform:translate(0,0)}20%{transform:translate(-3%,2%)}40%{transform:translate(2%,-3%)}60%{transform:translate(-2%,-1%)}80%{transform:translate(3%,3%)}100%{transform:translate(0,0)}}
/* reveal */
.rv{opacity:0;transform:translateY(30px);transition:opacity 1.1s var(--ease),transform 1.1s var(--ease)}
.rv.in{opacity:1;transform:none}
/* top bar */
.topbar{position:fixed;top:0;left:0;right:0;z-index:100;height:56px;display:flex;align-items:center;gap:24px;padding:0 28px;color:var(--paper);transition:background .4s,color .4s,box-shadow .4s}
.topbar.on-paper{background:rgba(242,235,221,.86);color:var(--ink);backdrop-filter:blur(14px) saturate(140%);-webkit-backdrop-filter:blur(14px) saturate(140%);box-shadow:0 1px 0 var(--line)}
.mark{display:flex;align-items:center;gap:10px;font-weight:900;font-size:18px;letter-spacing:.06em}
.mark em{font-family:var(--display);font-style:italic;font-weight:400;font-size:14px;opacity:.6;letter-spacing:0}
.mark-reel{width:20px;height:20px;border-radius:50%;border:2px solid currentColor;position:relative;animation:spin 8s linear infinite}
.mark-reel::before{content:"";position:absolute;inset:3px;border-radius:50%;background:radial-gradient(circle,currentColor 1.5px,transparent 2px) 0 0/6px 6px}
@keyframes spin{to{transform:rotate(360deg)}}
.topnav{display:flex;gap:26px;margin-left:auto;font-size:14px;letter-spacing:.12em}
.topnav a{position:relative;opacity:.75;transition:opacity .2s}
.topnav a:hover,.topnav a.active{opacity:1}
.topnav a.active::after{content:"";position:absolute;left:0;right:0;bottom:-6px;height:2px;background:var(--amber-hi)}
@media(max-width:760px){.topnav{display:none}.topbar{padding:0 16px}.topbar .stub-btn{margin-left:auto}}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}.rv{opacity:1;transform:none}}