/* NOVA design review — page shell */
:root{
  --bg:#09090B; --fg:#F4F5F7; --muted:#A1A5B0; --faint:#82869A;
  --card:#101114; --surface:#16181D; --elev:#1C1F26;
  --line:#1F2127; --line2:#2A2E37;
  --blue:#4F7CFF; --violet:#8B5CF6; --green:#22C55E; --amber:#F59E0B; --red:#EF4444;
  --max:1180px; --r:18px;
  --nav-bg:rgba(9,9,11,.78);
  --glow:radial-gradient(60% 60% at 50% 0%, rgba(79,124,255,.16), transparent 70%);
}
[data-theme="light"]{
  --bg:#F7F8FA; --fg:#0B0C0F; --muted:#5B606B; --faint:#697080;
  --card:#FFFFFF; --surface:#FFFFFF; --elev:#FFFFFF;
  --line:#E6E8EC; --line2:#D3D7DE;
  --blue:#2F55C8; --violet:#6D3FD4; --green:#15803D; --amber:#B45309; --red:#DC2626;
  --nav-bg:rgba(247,248,250,.82);
  --glow:radial-gradient(60% 60% at 50% 0%, rgba(47,85,200,.10), transparent 70%);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth; -webkit-text-size-adjust:100%}
body{
  margin:0; background:var(--bg); color:var(--fg);
  font-family:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  font-size:16px; line-height:1.6; -webkit-font-smoothing:antialiased;
  transition:background .3s ease,color .3s ease;
}
img,svg{display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3{font-family:'Inter Tight','Inter',sans-serif;margin:0;letter-spacing:-.02em}
.sprite{position:absolute;width:0;height:0;overflow:hidden}
.wrap{width:min(var(--max),calc(100% - 48px));margin:0 auto}
.icon{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.75;stroke-linecap:round;stroke-linejoin:round}
.icon.tiny{width:13px;height:13px;stroke-width:2}
.num{font-variant-numeric:tabular-nums;font-family:'JetBrains Mono',monospace;font-size:13px}

/* nav */
.nav{position:sticky;top:0;z-index:60;background:var(--nav-bg);backdrop-filter:blur(20px) saturate(180%);border-bottom:1px solid var(--line)}
.nav-inner{width:min(var(--max),calc(100% - 48px));margin:0 auto;height:66px;display:flex;align-items:center;gap:20px}
.brand{display:flex;align-items:center;gap:10px}
.brand-mark{width:20px;height:20px;fill:var(--fg)}
.brand-word{font-family:'Inter Tight',sans-serif;font-weight:600;font-size:15px;letter-spacing:.16em}
.nav-badge{font-size:11px;letter-spacing:.06em;text-transform:uppercase;color:var(--faint);border:1px solid var(--line2);padding:4px 9px;border-radius:999px;white-space:nowrap}
.nav-links{margin-left:auto;display:flex;gap:26px;font-size:13.5px;color:var(--muted)}
.nav-links a{transition:color .18s ease}
.nav-links a:hover{color:var(--fg)}
.theme-toggle{width:38px;height:38px;border-radius:50%;border:1px solid var(--line2);background:transparent;color:var(--muted);display:grid;place-items:center;cursor:pointer;transition:all .2s ease}
.theme-toggle:hover{color:var(--fg);border-color:var(--faint);transform:translateY(-1px)}

/* hero */
.hero{position:relative;overflow:hidden;padding:104px 0 96px;background:var(--glow)}
.hero::after{content:"";position:absolute;inset:auto 0 -1px 0;height:1px;background:linear-gradient(90deg,transparent,var(--line),transparent)}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:64px;align-items:center;position:relative}
.eyebrow{font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--faint);margin:0 0 22px;font-weight:500}
h1{font-size:clamp(46px,6.4vw,86px);line-height:.98;font-weight:600;letter-spacing:-.045em;margin-bottom:26px}
.lede{font-size:18px;line-height:1.62;color:var(--muted);max-width:52ch;margin:0 0 34px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:44px}
.btn{display:inline-flex;align-items:center;justify-content:center;height:50px;padding:0 22px;border-radius:14px;font-size:15px;font-weight:500;transition:transform .18s cubic-bezier(.2,.8,.3,1),box-shadow .18s ease,background .18s ease}
.btn-primary{background:#3D63DB;color:#fff;box-shadow:0 8px 24px rgba(61,99,219,.28)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 30px rgba(61,99,219,.34)}
.btn-ghost{border:1px solid var(--line2);color:var(--fg)}
.btn-ghost:hover{background:var(--surface);transform:translateY(-2px)}
.hero-stats{display:flex;gap:0;margin:0;border-top:1px solid var(--line);padding-top:22px}
.hero-stats div{padding-right:34px;margin-right:34px;border-right:1px solid var(--line)}
.hero-stats div:last-child{border:0;margin:0;padding:0}
.hero-stats dt{font-family:'Inter Tight',sans-serif;font-size:24px;font-weight:600;letter-spacing:-.02em}
.hero-stats dd{margin:0;font-size:12px;color:var(--faint);letter-spacing:.04em;text-transform:uppercase}
/* hero mark */
.hero-mark{position:relative;display:grid;place-items:center;min-height:380px}
.mark-orbit{position:absolute;width:340px;height:340px;border-radius:50%;border:1px solid var(--line2);opacity:.9}
.mark-orbit::before{content:"";position:absolute;inset:34px;border-radius:50%;border:1px dashed var(--line2);opacity:.7;animation:spin 90s linear infinite}
.mark-orbit::after{content:"";position:absolute;top:-3px;left:50%;width:6px;height:6px;border-radius:50%;background:var(--blue);box-shadow:0 0 14px var(--blue)}
@keyframes spin{to{transform:rotate(360deg)}}
.app-icon{position:relative;width:176px;height:176px;border-radius:42px;display:grid;place-items:center;
  background:linear-gradient(155deg,#1a2030 0%,#0a0b10 55%,#050507 100%);
  box-shadow:0 30px 90px rgba(79,124,255,.22),inset 0 0 0 1px rgba(255,255,255,.07)}
.app-icon svg{width:100px;height:100px;fill:url(#starGrad);filter:drop-shadow(0 6px 18px rgba(139,92,246,.35))}
.mark-caption{position:absolute;bottom:0;font-size:10.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--faint)}

/* sections */
.section{padding:92px 0;border-bottom:1px solid var(--line);position:relative}
.h2{font-size:clamp(29px,3.4vw,42px);line-height:1.1;font-weight:600;letter-spacing:-.032em;margin-bottom:18px;max-width:24ch}
.section-lede{max-width:64ch;color:var(--muted);font-size:16px;line-height:1.65;margin:0 0 46px}
h3{font-size:16px;font-weight:600;letter-spacing:-.01em}
.sub-h3{margin:54px 0 22px;font-size:13px;font-weight:500;letter-spacing:.04em;text-transform:uppercase;color:var(--faint);font-family:Inter,sans-serif}

/* principles */
.principles{display:grid;grid-template-columns:repeat(5,1fr);gap:0;border-top:1px solid var(--line2)}
.principle{padding:26px 22px 30px 0;border-right:1px solid var(--line);position:relative}
.principle:last-child{border-right:0;padding-right:0}
.p-num{font-family:'JetBrains Mono',monospace;font-size:11px;color:var(--blue);letter-spacing:.06em}
.principle h3{margin:14px 0 10px;font-size:17px}
.principle p{font-size:13.5px;line-height:1.6;color:var(--muted);margin:0}
.p-test{display:block;margin-top:12px;color:var(--faint);font-size:12px;font-style:italic}

/* identity */
.identity-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.identity-card{margin:0;border-radius:var(--r);border:1px solid var(--line);overflow:hidden;background:var(--card)}
.identity-card figcaption{font-size:12px;color:var(--faint);padding:12px 16px;border-top:1px solid var(--line);letter-spacing:.02em}
.dark-card .mark-stage{background:#0a0a0d}
.light-card{background:#fff}
.light-card figcaption{background:#fff;color:#697080;border-color:#E6E8EC}
.mark-stage{height:150px;display:grid;place-items:center}
.mark-lg{width:64px;height:64px;fill:#F4F5F7}
.mark-lg.ink{fill:#0B0C0F}
.lockup{height:150px;display:flex;align-items:center;justify-content:center;gap:12px}
.mark-sm{width:34px;height:34px;fill:#F4F5F7}
.wordmark{font-family:'Inter Tight',sans-serif;font-weight:600;letter-spacing:.18em;font-size:24px}
.icon-row{height:150px;display:flex;gap:14px;align-items:center;justify-content:center}
.app-icon-sm{width:66px;height:66px;border-radius:16px;box-shadow:0 10px 30px rgba(0,0,0,.4)}
.app-icon-sm svg{width:38px;height:38px}
.app-icon-sm.alt{background:#0f1014;box-shadow:inset 0 0 0 1px rgba(255,255,255,.08)}
.app-icon-sm.alt svg{fill:#F4F5F7;filter:none}
.rule-row{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:14px}
.rule-row>div{font-size:13px;color:var(--muted);line-height:1.6}
.tag{display:inline-block;font-size:10px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;padding:3px 7px;border-radius:5px;margin-right:8px;vertical-align:1px}
.tag.ok{background:rgba(34,197,94,.14);color:#4ade80}
.tag.no{background:rgba(239,68,68,.14);color:#f87171}
.tag.warn{background:rgba(245,158,11,.14);color:#fbbf24}
[data-theme="light"] .tag.ok{color:#15803D}
[data-theme="light"] .tag.no{color:#DC2626}
[data-theme="light"] .tag.warn{color:#B45309}

/* swatches */
.swatches{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:14px}
.swatch{border:1px solid var(--line);border-radius:14px;padding:8px;background:var(--card)}
.chip-color{height:76px;border-radius:9px;margin-bottom:10px;box-shadow:inset 0 0 0 1px rgba(255,255,255,.06)}
.chip-color.light{box-shadow:inset 0 0 0 1px rgba(0,0,0,.08)}
.swatch b{display:block;font-size:12.5px;font-family:'JetBrains Mono',monospace;font-weight:500}
.swatch span{display:block;font-size:11px;color:var(--faint);margin-top:2px}
.table-card{margin-top:22px;border:1px solid var(--line);border-radius:var(--r);background:var(--card);overflow:hidden}
.spec-table{width:100%;border-collapse:collapse;font-size:13.5px}
.spec-table th{text-align:left;font-size:10.5px;letter-spacing:.09em;text-transform:uppercase;color:var(--faint);font-weight:500;padding:14px 20px;border-bottom:1px solid var(--line);background:var(--surface)}
.spec-table td{padding:13px 20px;border-top:1px solid var(--line);color:var(--muted)}
.spec-table tr:first-child td{border-top:0}
.spec-table td:first-child{color:var(--fg)}
.table-note{margin:0;padding:16px 20px;font-size:12.5px;color:var(--faint);border-top:1px solid var(--line);line-height:1.6}
/* typography */
.type-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:48px;align-items:start}
.type-specimen{border-top:1px solid var(--line2)}
.specimen-row{display:flex;align-items:baseline;justify-content:space-between;gap:24px;padding:20px 0;border-bottom:1px solid var(--line)}
.s-label{font-size:10.5px;letter-spacing:.08em;text-transform:uppercase;color:var(--faint);flex:0 0 150px}
.s-display{font-family:'Inter Tight',sans-serif;font-size:64px;line-height:1;font-weight:600;letter-spacing:-.04em}
.s-title2{font-family:'Inter Tight',sans-serif;font-size:24px;font-weight:600;letter-spacing:-.02em}
.s-body{font-size:15px;line-height:1.55;color:var(--muted);max-width:34ch;text-align:left}
.s-foot{font-size:13px;color:var(--muted)}
.s-micro{font-size:11px;font-weight:600;letter-spacing:.06em;color:var(--muted)}
.s-mono{font-family:'JetBrains Mono',monospace;font-size:13px;color:var(--muted)}
.s-ar{font-family:'IBM Plex Sans Arabic',sans-serif;font-size:19px;line-height:1.9;direction:rtl}
.type-notes h3{margin-bottom:12px}
.tight{margin:0 0 30px;padding-left:18px;color:var(--muted);font-size:13.5px;line-height:1.7}
.tight li{margin-bottom:7px}
.type-poster{margin-top:10px;border-radius:var(--r);padding:26px;background:linear-gradient(150deg,#141824,#0b0c10);border:1px solid var(--line);display:flex;flex-direction:column;gap:6px}
[data-theme="light"] .type-poster{background:linear-gradient(150deg,#eef1f8,#fff)}
.poster-kicker{font-size:10px;letter-spacing:.2em;color:var(--blue)}
.poster-line{font-family:'Inter Tight',sans-serif;font-size:29px;line-height:1.08;font-weight:600;letter-spacing:-.03em}
.poster-sub{font-size:11px;color:var(--faint);margin-top:10px}

/* space + icons */
.space-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px}
.space-block h3{margin-bottom:18px}
.space-bars div{display:flex;align-items:center;gap:14px;margin-bottom:11px;font-size:11.5px;color:var(--faint);font-family:'JetBrains Mono',monospace}
.space-bars i{display:block;height:8px;border-radius:2px;background:linear-gradient(90deg,var(--blue),var(--violet))}
.radius-row{display:flex;gap:10px;flex-wrap:wrap}
.r-sample{width:62px;height:62px;display:grid;place-items:center;border:1px solid var(--line2);font-size:11px;color:var(--faint);background:var(--surface);font-family:'JetBrains Mono',monospace}
.note{font-size:12.5px;color:var(--faint);margin:16px 0 0;line-height:1.65;max-width:44ch}
.icon-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(104px,1fr));gap:10px}
.icon-grid span{display:flex;flex-direction:column;align-items:center;gap:9px;padding:18px 6px;border:1px solid var(--line);border-radius:12px;font-size:10.5px;color:var(--faint);background:var(--card)}
.icon-grid .icon{color:var(--fg)}

/* components */
.comp-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.comp-card{border:1px solid var(--line);border-radius:var(--r);background:var(--card);padding:20px;display:flex;flex-direction:column;gap:10px}
.comp-card.wide{grid-column:span 2}
.comp-label{font-size:10px;letter-spacing:.1em;text-transform:uppercase;color:var(--faint);margin-bottom:4px}
.c-btn{height:44px;border-radius:12px;border:1px solid transparent;font:500 14px Inter,sans-serif;cursor:pointer;transition:transform .16s ease,filter .16s ease;width:100%}
.c-btn:hover{transform:translateY(-1px);filter:brightness(1.06)}
.c-btn.primary{background:#3D63DB;color:#fff}
.c-btn.secondary{background:transparent;border-color:var(--line2);color:var(--fg)}
.c-btn.ghost{background:transparent;color:var(--blue);text-align:left;padding:0 4px;height:36px}
.c-btn.danger{background:rgba(239,68,68,.1);color:#f87171;text-align:left;padding:0 14px;height:38px}
[data-theme="light"] .c-btn.danger{color:#DC2626}
.c-btn.small{height:36px;font-size:12.5px;width:auto;padding:0 14px;align-self:flex-start}
.c-field{display:flex;align-items:center;gap:6px;height:48px;border-radius:13px;border:1px solid var(--line2);background:var(--surface);padding:0 14px;font-size:15px}
.c-field .at{color:var(--faint)}
.c-field .val{font-weight:500}
.c-field .ok-ic{color:var(--green);margin-left:auto;width:18px;height:18px}
.c-field.error{border-color:rgba(239,68,68,.5)}
.c-field .tag{margin-left:auto;margin-right:0}
.c-help{font-size:11.5px;margin:-2px 0 2px}
.ok-text{color:#4ade80}
[data-theme="light"] .ok-text{color:#15803D}
.c-suggest{display:flex;gap:6px;flex-wrap:wrap}
.c-suggest span{font-size:11.5px;padding:5px 10px;border-radius:999px;background:var(--surface);border:1px solid var(--line);color:var(--muted)}
.c-setting{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 0;border-top:1px solid var(--line)}
.c-setting:first-of-type{border-top:0}
.c-setting b{display:block;font-size:13.5px;font-weight:500}
.c-setting small{display:block;font-size:11px;color:var(--faint)}
.c-setting .meta{font-size:12px;color:var(--faint)}
.c-toggle{width:40px;height:24px;border-radius:999px;background:var(--line2);position:relative;flex:0 0 auto}
.c-toggle::after{content:"";position:absolute;top:3px;left:3px;width:18px;height:18px;border-radius:50%;background:#fff;transition:transform .2s ease}
.c-toggle.on{background:#3D63DB}
.c-toggle.on::after{transform:translateX(16px)}
.c-chip-row{display:flex;gap:7px;flex-wrap:wrap;margin-bottom:12px}
.c-chip{font-size:12px;padding:6px 12px;border-radius:999px;border:1px solid var(--line2);color:var(--muted)}
.c-chip.sel{background:rgba(79,124,255,.14);border-color:rgba(79,124,255,.4);color:#9db6ff}
.c-chip.facet{font-family:'JetBrains Mono',monospace;font-size:11px;border-style:dashed}
.c-chip i{font-style:normal;color:var(--faint);margin-left:4px}
[data-theme="light"] .c-chip.sel{color:#2F55C8}
.c-avatars{display:flex;align-items:center;gap:8px;margin-top:auto}
.c-av{width:38px;height:38px;border-radius:50%;display:grid;place-items:center;font-size:12px;font-weight:600;color:#fff;letter-spacing:.02em}
.c-presence{display:flex;align-items:center;gap:6px;font-size:11px;color:var(--faint);margin-left:6px}
.c-presence .dot{width:7px;height:7px;border-radius:50%;background:var(--green)}
.a1{background:linear-gradient(140deg,#4F7CFF,#7C5CE8)}
.a2{background:linear-gradient(140deg,#0EA5A4,#1FA97A)}
.a3{background:linear-gradient(140deg,#F59E0B,#D97706)}
.a4{background:linear-gradient(140deg,#EC4899,#B04CD8)}
.a5{background:linear-gradient(140deg,#8B5CF6,#4F7CFF)}
.a6{background:linear-gradient(140deg,#8B5CF6,#C084FC)}
.c-thread{display:flex;flex-direction:column;gap:8px;background:var(--bg);border:1px solid var(--line);border-radius:14px;padding:16px}
.c-bubble{max-width:74%;padding:9px 13px;border-radius:16px;font-size:13.5px;line-height:1.45;position:relative;background:var(--surface)}
.c-bubble.in{border-bottom-left-radius:4px;align-self:flex-start}
.c-bubble.out{border-bottom-right-radius:4px;align-self:flex-end;background:rgba(79,124,255,.14)}
.c-time{display:inline-flex;align-items:center;gap:3px;font-size:9.5px;color:var(--faint);margin-left:8px;vertical-align:1px}
.c-voice{display:flex;align-items:center;gap:9px;align-self:flex-start;background:var(--surface);border-radius:16px;padding:9px 13px;width:66%}
.c-voice .icon{width:15px;height:15px;fill:currentColor;stroke:none}
.wave{flex:1;height:14px;background:repeating-linear-gradient(90deg,var(--faint) 0 2px,transparent 2px 5px);opacity:.55;border-radius:2px;mask-image:linear-gradient(90deg,#000 60%,transparent)}
.c-reactions{display:flex;gap:6px;font-size:11px;align-self:flex-start}
.c-reactions span{background:var(--surface);border:1px solid var(--line2);border-radius:999px;padding:3px 8px;color:var(--muted)}
.c-reactions .add{color:var(--faint)}
.c-composer{display:flex;align-items:center;gap:9px;background:var(--bg);border:1px solid var(--line);border-radius:14px;padding:7px}
.c-plus{width:32px;height:32px;border-radius:50%;background:var(--surface);display:grid;place-items:center;color:var(--muted);flex:0 0 auto}
.c-plus .icon{width:16px;height:16px}
.c-input{flex:1;font-size:13px;color:var(--faint)}
.c-send{width:30px;height:30px;border-radius:50%;background:#3D63DB;display:grid;place-items:center;color:#fff;flex:0 0 auto}
.c-send .icon{width:14px;height:14px}
.c-reply{display:flex;gap:9px;align-items:center;background:var(--surface);border-radius:10px;padding:8px 10px}
.c-reply i{width:2px;height:26px;background:var(--blue);border-radius:2px}
.c-reply b{display:block;font-size:11px;color:var(--blue)}
.c-reply small{font-size:11px;color:var(--faint)}
.c-consent{display:flex;align-items:center;gap:7px;font-size:10.5px;color:var(--muted);background:rgba(139,92,246,.1);border:1px solid rgba(139,92,246,.22);border-radius:8px;padding:7px 10px}
.c-consent .icon{width:13px;height:13px;color:#c4a7ff}
.c-ai p{font-size:12.5px;line-height:1.55;color:var(--muted);margin:8px 0}
.c-src{display:flex;gap:6px;flex-wrap:wrap}
.c-src span{font-size:10px;font-family:'JetBrains Mono',monospace;color:var(--faint);border-bottom:1px dotted var(--line2);padding-bottom:1px}
.c-safety{display:flex;flex-direction:column;gap:9px}
.stars{display:flex;gap:4px;color:var(--blue)}
.stars .icon{width:15px;height:15px;fill:currentColor;stroke:none}
.stars .dim{opacity:.25}
.c-safety p{margin:0;font-size:11.5px;line-height:1.55;color:var(--muted)}
.c-safety b{color:var(--fg);font-weight:500}

/* motion lab */
.motion-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-bottom:22px}
.motion-card{border:1px solid var(--line);border-radius:var(--r);background:var(--card);padding:20px;display:flex;flex-direction:column;gap:14px;min-height:230px}
.demo-thread{flex:1;display:flex;flex-direction:column;justify-content:flex-end;gap:6px;min-height:90px}
.bub.demo{max-width:88%;padding:8px 12px;border-radius:14px;border-bottom-left-radius:4px;background:var(--surface);font-size:12.5px;opacity:0;transform:translateY(8px) scale(.96)}
.bub.demo.show{animation:bubbleIn .34s cubic-bezier(.2,.9,.3,1.1) forwards}
@keyframes bubbleIn{to{opacity:1;transform:none}}
.demo-stage{position:relative;flex:1;background:var(--bg);border:1px solid var(--line);border-radius:12px;overflow:hidden;min-height:110px}
.demo-page{position:absolute;inset:0;background:repeating-linear-gradient(180deg,transparent 0 14px,var(--line) 14px 15px);opacity:.5;margin:14px}
.demo-sheet{position:absolute;left:0;right:0;bottom:0;background:var(--elev);border-top:1px solid var(--line2);border-radius:14px 14px 0 0;padding:12px 14px 18px;transform:translateY(100%);transition:transform .34s cubic-bezier(.16,.86,.24,1)}
.demo-sheet.open{transform:none}
.demo-sheet p{margin:8px 0 0;font-size:12px}
.dim-t{color:var(--faint);font-size:10.5px}
.demo-reaction{position:relative;flex:1;display:flex;align-items:center}
.react-pop{position:absolute;left:16px;bottom:44px;font-size:18px;opacity:0;transform:scale(.6)}
.react-pop.go{animation:reactIn .26s cubic-bezier(.2,.7,.3,1.5) forwards}
@keyframes reactIn{60%{opacity:1;transform:scale(1.08)}100%{opacity:1;transform:scale(1) translateY(-6px)}}
/* screens */
.screens-section{background:radial-gradient(70% 40% at 50% 0%,rgba(79,124,255,.07),transparent 70%)}
.device-grid{display:grid;grid-template-columns:repeat(3,326px);gap:36px 28px;justify-content:center}
.device{margin:0}
.device figcaption{margin-top:14px;display:flex;flex-direction:column;gap:3px;max-width:326px}
.device figcaption b{font-size:12.5px;font-weight:500;letter-spacing:.02em}
.device figcaption span{font-size:11.5px;color:var(--faint);line-height:1.5}
.phone{width:326px;height:689px;padding:7px;border-radius:41px;position:relative;
  background:linear-gradient(160deg,#2a2a31,#0a0a0c 60%);
  box-shadow:0 34px 70px rgba(0,0,0,.55),inset 0 0 0 1px rgba(255,255,255,.09);
  transition:transform .4s cubic-bezier(.2,.8,.3,1),box-shadow .4s ease}
.phone:hover{transform:translateY(-6px);box-shadow:0 44px 90px rgba(0,0,0,.6),inset 0 0 0 1px rgba(255,255,255,.14)}
[data-theme="light"] .phone{background:linear-gradient(160deg,#e9ecf2,#c9ced8);box-shadow:0 24px 50px rgba(16,24,40,.18),inset 0 0 0 1px rgba(255,255,255,.7)}
.screen{width:390px;height:844px;transform:scale(.8);transform-origin:top left;border-radius:34px;overflow:hidden;position:relative}

/* handoff */
.handoff-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.decision-card{border:1px solid var(--line);border-radius:var(--r);background:var(--card);padding:26px}
.decision-card h3{font-size:14px;letter-spacing:.04em;text-transform:uppercase;color:var(--faint);font-weight:500;margin-bottom:18px;font-family:Inter,sans-serif}
.decision-list{margin:0;padding-left:18px;color:var(--muted);font-size:13.5px;line-height:1.6}
.decision-list li{margin-bottom:13px;padding-left:4px}
.decision-list b{color:var(--fg);font-weight:600}
.check-list{list-style:none;margin:0;padding:0;font-size:13.5px;color:var(--muted)}
.check-list li{position:relative;padding:9px 0 9px 30px;border-top:1px solid var(--line);cursor:pointer;transition:color .2s ease}
.check-list li:first-child{border-top:0}
.check-list li::before{content:"";position:absolute;left:0;top:11px;width:16px;height:16px;border-radius:5px;border:1px solid var(--line2);transition:all .18s ease}
.check-list li.done{color:var(--faint);text-decoration:line-through}
.check-list li.done::before{background:#3D63DB;border-color:#3D63DB}
.check-list li.done::after{content:"";position:absolute;left:5px;top:14px;width:6px;height:9px;border:2px solid #fff;border-top:0;border-left:0;transform:rotate(42deg)}

/* footer */
.foot{border-top:1px solid var(--line);padding:44px 0 56px}
.foot-inner{display:flex;gap:28px;align-items:flex-start}
.brand.small .brand-mark{width:16px;height:16px}
.brand.small .brand-word{font-size:13px}
.foot p{margin:0;font-size:12px;color:var(--faint);line-height:1.7;max-width:78ch}

@media (max-width:1080px){
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero-mark{min-height:300px;order:-1}
  .mark-orbit{width:280px;height:280px}
  .app-icon{width:140px;height:140px;border-radius:34px}
  .app-icon svg{width:78px;height:78px}
  .principles{grid-template-columns:repeat(2,1fr)}
  .principle{padding:24px 20px 26px 0}
  .principle:nth-child(2n){border-right:0}
  .principle:nth-child(n+3){border-top:1px solid var(--line)}
  .identity-grid{grid-template-columns:repeat(2,1fr)}
  .type-grid,.space-grid,.handoff-grid{grid-template-columns:1fr;gap:32px}
  .comp-grid{grid-template-columns:repeat(2,1fr)}
  .comp-card.wide{grid-column:span 2}
  .motion-grid{grid-template-columns:1fr}
  .device-grid{grid-template-columns:repeat(2,326px)}
  .nav-links{display:none}
}
@media (max-width:720px){
  .wrap,.nav-inner{width:calc(100% - 32px)}
  .hero{padding:64px 0 56px}
  .section{padding:64px 0}
  .principles{grid-template-columns:1fr}
  .principle{border-right:0;border-top:1px solid var(--line)}
  .principle:first-child{border-top:0}
  .identity-grid,.comp-grid,.rule-row{grid-template-columns:1fr}
  .comp-card.wide{grid-column:span 1}
  .device-grid{grid-template-columns:326px}
  .swatches{grid-template-columns:repeat(2,1fr)}
  .foot-inner{flex-direction:column}
  .hero-stats div{padding-right:20px;margin-right:20px}
  .specimen-row{flex-direction:column;gap:8px}
  .s-label{flex:none}
  .s-body{text-align:left}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}
  html{scroll-behavior:auto}
}