/* ================================================================
   patents.css — siten.ai patent explainers
   Canonical base CSS for all patent explainer pages.

   Load order: link this file BEFORE each page's per-patent <style>
   so per-patent inline rules take cascade precedence over these defaults.

   Template version: P04-style (US10721135B1). P06+ should build
   per-patent <style> blocks with only visualization-specific CSS;
   everything else is covered here.

   P01/P02/P03/P05: use older template patterns inline. Their
   <style> blocks override these rules where needed.
   ================================================================ */

/* ── Design tokens ── */
:root{--ink:#080c0e;--panel:#0d1417;--panel2:#111b1e;--line:#213136;--muted:#8b9c9f;--text:#edf2ed;--paper:#e5d8bd;--cyan:#76d4d0;--green:#9bd49b;--coral:#ee8a73;--gold:#ddbc72;--mono:"DM Mono",monospace;--sans:"Manrope",sans-serif;--serif:"Newsreader",serif}

/* ── Reset ── */
*{box-sizing:border-box}html,body{margin:0;background:var(--ink);color:var(--text);font-family:var(--sans);scroll-behavior:smooth}body{overflow:hidden}
button,a{font:inherit}a{color:inherit}

/* ── Scroller ── */
.scroller{height:100vh;overflow-y:auto;scroll-snap-type:y mandatory;scrollbar-width:none}.scroller::-webkit-scrollbar{display:none}

/* ── Mobile-first layout ── */
.slide{position:relative;min-height:100vh;scroll-snap-align:start;scroll-snap-stop:always;display:flex;align-items:center;padding:72px 24px 100px;isolation:isolate;overflow:hidden}
.slide:before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(118,212,208,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(118,212,208,.035) 1px,transparent 1px);background-size:48px 48px;mask-image:linear-gradient(90deg,transparent,black 20%,black 80%,transparent);z-index:-2}
.slide:after{content:"";position:absolute;inset:0;background:radial-gradient(circle at 72% 44%,rgba(118,212,208,.08),transparent 32%);z-index:-3}
.slide:nth-child(3n):after{background:radial-gradient(circle at 22% 58%,rgba(221,188,114,.07),transparent 30%)}
.wrap{width:min(1240px,100%);margin:auto}
.grid{display:grid;grid-template-columns:1fr;gap:22px;align-items:center}
.stage{border:1px solid var(--line);background:rgba(13,20,23,.78);padding:16px;min-height:auto;position:relative;overflow:hidden}
.stage:before{display:none}
.rail{position:fixed;right:9px;top:50%;transform:translateY(-50%);display:grid;gap:9px;z-index:20}
.top{position:fixed;top:0;left:0;right:0;height:54px;padding:0 13px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid rgba(118,212,208,.12);background:rgba(8,12,14,.76);backdrop-filter:blur(16px);z-index:20}
.top .label{color:#a7bcbd;font-size:8px}
.top-right{display:flex;align-items:center;gap:10px}

/* ── Desktop enhancements ── */
@media(min-width:820px){
  .slide{padding:80px clamp(22px,6vw,104px) 100px}
  .grid{grid-template-columns:minmax(0,1.02fr) minmax(380px,.98fr);gap:clamp(34px,6vw,90px)}
  .stage{min-height:350px;padding:22px}
  .stage:before{display:block;content:"";position:absolute;inset:10px;border:1px solid rgba(118,212,208,.07);pointer-events:none}
  .rail{right:18px}
  .top{padding:0 22px}
  .top .label{font-size:10px}
  .top-right{gap:16px}
}
@media(min-width:520px){
  h1{font-size:clamp(58px,7vw,108px)}
  h2{font-size:clamp(43px,5vw,74px)}
  .apps,.citations{grid-template-columns:repeat(2,1fr)}
}

/* ── Typography ── */
.eyebrow,.label{font-family:var(--mono);font-size:10px;line-height:1.4;letter-spacing:.16em;text-transform:uppercase;color:var(--cyan)}.eyebrow{margin-bottom:18px}
h1,h2{font-family:var(--serif);font-weight:400;letter-spacing:0;margin:0}
h1{font-size:58px;line-height:.91;max-width:900px}
h2{font-size:43px;line-height:.96;max-width:780px}
h3,p{margin:0}h3{font-size:15px;line-height:1.35}p{color:var(--muted);font-size:clamp(14px,1.25vw,17px);line-height:1.75}.lede{font-size:clamp(17px,1.7vw,23px);line-height:1.55;color:#c2cdca;max-width:740px}
.accent{color:var(--cyan)}.gold{color:var(--gold)}.paper{color:var(--paper)}.coral{color:var(--coral)}

/* ── Chrome ── */
.count{font-family:var(--mono);font-size:10px;color:var(--paper)}
.meter{height:2px;position:fixed;top:53px;left:0;width:100%;background:rgba(118,212,208,.08);z-index:21}.meter i{display:block;height:100%;width:9%;background:var(--cyan);transition:width .55s ease}
.dot{width:7px;height:7px;border:1px solid #52686b;background:transparent;border-radius:50%;padding:0;cursor:pointer;transition:.3s}.dot.on{background:var(--cyan);border-color:var(--cyan);transform:scale(1.45)}
.sweep{position:fixed;inset:0;pointer-events:none;z-index:40;transform:translateY(-110%);background:linear-gradient(180deg,transparent,rgba(118,212,208,.08),transparent)}.sweep.go{animation:sweep .7s ease}@keyframes sweep{to{transform:translateY(110%)}}
.stage-title{font:10px var(--mono);letter-spacing:.15em;color:var(--muted);text-transform:uppercase;margin-bottom:20px}
.foot{position:absolute;bottom:56px;right:28px;font:9px var(--mono);letter-spacing:.1em;text-transform:uppercase;color:#607275}

/* ── Reveal animation ── */
.reveal{opacity:0;transform:translateY(20px);transition:opacity .7s ease,transform .7s ease}.active .reveal{opacity:1;transform:none}
.d1{transition-delay:.11s}.d2{transition-delay:.22s}.d3{transition-delay:.33s}.d4{transition-delay:.44s}.d5{transition-delay:.55s}.d6{transition-delay:.66s}

/* ── Cover slide ── */
.wrap.cover{max-width:760px}
.meta{display:flex;flex-wrap:wrap;gap:22px;margin-top:32px}.meta div{padding-left:14px;border-left:1px solid var(--line)}.meta b{display:block;font-family:var(--mono);font-size:11px;color:var(--paper);margin-bottom:6px}.meta span{font-family:var(--mono);font-size:9px;color:var(--muted);text-transform:uppercase;letter-spacing:.12em}
.hint{position:absolute;bottom:24px;left:50%;transform:translateX(-50%);display:grid;justify-items:center;gap:8px;color:#698184;font-family:var(--mono);font-size:9px;letter-spacing:.15em}.hint i{height:34px;width:1px;background:linear-gradient(var(--cyan),transparent);animation:down 1.7s ease-in-out infinite}@keyframes down{50%{transform:translateY(7px);opacity:.4}}

/* ── Applications grid ── */
.apps{display:grid;grid-template-columns:1fr;gap:10px}
.app{padding:15px;border:1px solid var(--line);background:#0b1214;transition:.25s}
.app:hover{border-color:var(--cyan);transform:translateY(-3px)}
.app b{display:block;color:var(--paper);font-size:13px;margin:8px 0}
.app span{font-size:11px;line-height:1.5;color:var(--muted)}

/* ── Citations ── */
.cite-logos{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:14px}
.cite-logo{padding:5px 12px;border:1px solid rgba(118,212,208,.18);background:rgba(118,212,208,.04);font:500 9px var(--mono);letter-spacing:.14em;color:var(--muted);text-transform:uppercase}
.cite-logo.t1{border-color:rgba(221,188,114,.38);background:rgba(221,188,114,.06);color:var(--gold)}
.cite-logo.dim{color:#3d5254;border-color:rgba(118,212,208,.09)}
.citations{display:grid;grid-template-columns:1fr;gap:9px}
.cite{padding:12px;border:1px solid var(--line);background:#0b1214}
.cite b{display:block;font-size:12px;color:var(--paper);margin-bottom:5px}
.cite span{display:block;font:9px/1.5 var(--mono);color:var(--muted)}
.cite .who{color:var(--cyan)}
.note{margin-top:14px;padding:11px 13px;border-left:2px solid var(--gold);background:rgba(221,188,114,.05);font-size:11px;line-height:1.6;color:var(--muted)}

/* ── Timeline ── */
.tl-wrap{text-align:center}
.tl-wrap h2,.tl-wrap .eyebrow,.tl-wrap .lede,.tl-wrap .tl-h{text-align:center;margin-left:auto;margin-right:auto}
.tl-h{display:flex;align-items:center;width:100%;max-width:820px;justify-content:center}
.tl-e{display:flex;flex-direction:column;align-items:center;gap:7px;position:relative}
.tl-dot{width:11px;height:11px;border-radius:50%;border:2px solid var(--cyan);background:var(--ink);box-shadow:0 0 12px rgba(118,212,208,.35);cursor:default;transition:all .3s}
.tl-e:hover .tl-dot{transform:scale(1.5);box-shadow:0 0 20px rgba(118,212,208,.5)}
.tl-date{font-size:.82rem;font-weight:500;color:var(--text)}
.tl-lbl{font-size:9px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
.tl-line{flex:1;height:1px;background:linear-gradient(90deg,rgba(118,212,208,.3),rgba(82,182,178,.15));min-width:30px;max-width:100px;position:relative}
.tl-dur{position:absolute;top:-18px;left:50%;transform:translateX(-50%);font-size:9px;color:var(--muted);white-space:nowrap;background:var(--ink);padding:2px 6px;border-radius:4px;border:1px solid var(--line);opacity:0;transition:opacity .25s;pointer-events:none}
.tl-line:hover .tl-dur{opacity:1}
.tip{position:absolute;bottom:calc(100% + 8px);left:50%;transform:translateX(-50%);background:var(--panel2);border:1px solid var(--line);border-radius:8px;padding:8px 12px;font-size:.72rem;color:var(--text);white-space:nowrap;opacity:0;pointer-events:none;transition:opacity .2s;z-index:200}
.tl-e:hover .tip{opacity:1}
.sources{margin-top:25px;display:flex;gap:16px;flex-wrap:wrap;justify-content:center}.sources a{font:10px var(--mono);letter-spacing:.08em;text-transform:uppercase;color:var(--cyan);text-decoration:none;border-bottom:1px solid rgba(118,212,208,.4);padding-bottom:4px}

/* ── Reduced motion ── */
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}

/* ── Share button ──
   Sits below the header/meter bar, right-aligned with .rail, so it never
   collides with the variable-width patent-number label in .top-right
   regardless of which patent's number is showing. */
.btn-share{position:fixed;top:66px;right:9px;background:transparent;border:none;cursor:pointer;padding:5px;z-index:25;color:var(--muted);opacity:.75;transition:.2s;line-height:0}.btn-share:hover{opacity:1;color:var(--cyan)}
@media(min-width:820px){.btn-share{right:18px}}

/* ── Keyboard hint ── */
.kb-hint{position:fixed;bottom:54px;left:22px;font:9px var(--mono);letter-spacing:.14em;text-transform:uppercase;color:var(--muted);background:rgba(8,12,14,.88);backdrop-filter:blur(12px);padding:7px 12px;border:1px solid var(--line);border-radius:2px;z-index:19;opacity:0;transform:translateY(4px);transition:opacity .4s,transform .4s;pointer-events:none}.kb-hint.show{opacity:1;transform:translateY(0)}

/* ── Patent nav bar ────────────────────────────────────────────────
   Grid layout gives true center regardless of left/right label widths.
   Replaces the flex/space-between approach which shifts center when
   labels are unequal. Safe-area rows extend the background under the
   iOS home indicator while keeping nav items in the visible 44px row. */
.patent-nav{
  position:fixed;bottom:0;left:0;right:0;
  height:calc(44px + env(safe-area-inset-bottom,0px));
  background:rgba(8,12,14,.82);backdrop-filter:blur(16px);
  border-top:1px solid rgba(118,212,208,.12);
  display:grid;
  grid-template-columns:1fr auto 1fr;
  grid-template-rows:44px env(safe-area-inset-bottom,0px);
  align-items:center;padding:0 22px;z-index:20
}
.patent-nav a,.nav-dim{
  font:10px var(--mono);letter-spacing:.11em;text-transform:uppercase;
  text-decoration:none;transition:color .2s
}
.patent-nav a{color:var(--muted)}
.patent-nav a:hover{color:var(--cyan)}
.nav-dim{color:#334d50;font:10px var(--mono);letter-spacing:.11em;text-transform:uppercase}
.patent-nav .nav-center{display:flex;gap:16px;align-items:center}
.nav-sep{color:#3d5254;font:10px var(--mono)}
.patent-nav>*:last-child{text-align:right}