/* GrokThumbnails — shared styles. No external fonts: system stack keeps LCP fast. */
:root{
  --bg:#f7f6f3; --surface:#ffffff; --surface-2:#efede8; --ink:#16151a; --ink-2:#4a4851; --muted:#77747f;
  --line:#e2dfd8; --accent:#e5402f; --accent-ink:#ffffff; --accent-soft:#fde7e3; --ok:#1d8a4e; --warn:#b26b00; --bad:#c62828;
  --radius:14px; --radius-sm:9px; --shadow:0 1px 2px rgba(20,18,30,.06),0 8px 24px -12px rgba(20,18,30,.18);
  --font:ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  color-scheme:light;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --bg:#121116; --surface:#1b1a21; --surface-2:#24232b; --ink:#f2f1f5; --ink-2:#c3c1cb; --muted:#8f8c99;
    --line:#2f2d37; --accent:#ff5a47; --accent-ink:#16151a; --accent-soft:#3a1d1a; --ok:#44c27f; --warn:#f0a83a; --bad:#ff6b6b;
    color-scheme:dark;
  }
}
:root[data-theme="dark"]{
  --bg:#121116; --surface:#1b1a21; --surface-2:#24232b; --ink:#f2f1f5; --ink-2:#c3c1cb; --muted:#8f8c99;
  --line:#2f2d37; --accent:#ff5a47; --accent-ink:#16151a; --accent-soft:#3a1d1a; --ok:#44c27f; --warn:#f0a83a; --bad:#ff6b6b;
  color-scheme:dark;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.65 var(--font);overflow-x:hidden}
img,svg,canvas{max-width:100%;display:block}
a{color:var(--accent);text-underline-offset:2px}
a:hover{text-decoration-thickness:2px}
h1,h2,h3{line-height:1.15;letter-spacing:-.02em;margin:0 0 .5em}
h1{font-size:clamp(1.9rem,4.6vw,3rem);font-weight:850}
h2{font-size:clamp(1.35rem,2.6vw,1.75rem);font-weight:800;margin-top:2.2em}
h3{font-size:1.15rem;font-weight:750;margin-top:1.6em}
p{margin:0 0 1em}
code,kbd{font-family:var(--mono);font-size:.9em;background:var(--surface-2);padding:.1em .35em;border-radius:5px}
.skip{position:absolute;left:-999px;top:0;background:var(--ink);color:var(--bg);padding:.6em 1em;z-index:99}
.skip:focus{left:8px;top:8px}
.wrap{width:100%;max-width:1120px;margin:0 auto;padding:0 16px}
.narrow{max-width:780px}

/* Header */
.site-header{position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--line)}
.site-header .wrap{display:flex;align-items:center;gap:16px;min-height:62px}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none;font-weight:850;letter-spacing:-.03em;font-size:1.12rem}
.brand svg{width:30px;height:30px}
.brand span b{color:var(--accent)}
.nav{margin-left:auto;display:flex;align-items:center;gap:4px}
.nav a{color:var(--ink-2);text-decoration:none;font-weight:600;font-size:.94rem;padding:.45em .7em;border-radius:8px}
.nav a:hover,.nav a[aria-current="page"]{color:var(--ink);background:var(--surface-2)}
.menu{margin-left:auto;display:none}
.menu summary{list-style:none;cursor:pointer;padding:.5em .7em;border:1px solid var(--line);border-radius:9px;font-weight:700;font-size:.9rem}
.menu summary::-webkit-details-marker{display:none}
.menu[open] .menu-panel{display:grid}
.menu-panel{display:none;position:absolute;right:16px;left:16px;top:60px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:8px;gap:2px}
.menu-panel a{color:var(--ink);text-decoration:none;padding:.6em .8em;border-radius:8px;font-weight:600}
.menu-panel a:hover{background:var(--surface-2)}
.theme-btn{border:1px solid var(--line);background:var(--surface);color:var(--ink);border-radius:9px;width:38px;height:38px;cursor:pointer;display:grid;place-items:center;flex:none}
.theme-btn svg{width:18px;height:18px}
@media (max-width:860px){.nav{display:none}.menu{display:block}}

/* Breadcrumb + hero */
.crumbs{font-size:.85rem;color:var(--muted);margin:22px 0 10px}
.crumbs ol{list-style:none;padding:0;margin:0;display:flex;flex-wrap:wrap;gap:6px}
.crumbs li+li::before{content:"/";margin-right:6px;color:var(--line)}
.crumbs a{color:var(--muted);text-decoration:none}
.crumbs a:hover{color:var(--ink)}
.hero{padding:8px 0 18px}
.hero .lead{font-size:1.12rem;color:var(--ink-2);max-width:62ch}
.eyebrow{display:inline-block;font-size:.78rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:var(--accent);margin-bottom:8px}
.home-hero{padding:34px 0 10px}
.home-hero h1{font-size:clamp(2.1rem,5.6vw,3.6rem);max-width:16ch}

/* Tool card */
.tool{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:20px;margin:14px 0 8px}
@media (min-width:720px){.tool{padding:28px}}
.row{display:flex;flex-wrap:wrap;gap:10px;align-items:center}
.grow{flex:1 1 260px;min-width:0}
label{font-weight:650;font-size:.92rem}
.field{display:grid;gap:6px;margin-bottom:12px}
.field small{color:var(--muted)}
input[type=text],input[type=url],input[type=number],select,textarea{width:100%;font:inherit;color:var(--ink);background:var(--bg);border:1.5px solid var(--line);border-radius:var(--radius-sm);padding:.72em .9em;min-height:46px}
input:focus-visible,select:focus-visible,textarea:focus-visible,button:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid color-mix(in srgb,var(--accent) 55%,transparent);outline-offset:2px}
input[type=color]{width:46px;height:46px;border:1.5px solid var(--line);border-radius:var(--radius-sm);background:var(--bg);padding:3px;cursor:pointer}
input[type=range]{width:100%;accent-color:var(--accent)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font:inherit;font-weight:750;border:0;border-radius:var(--radius-sm);padding:.72em 1.15em;min-height:46px;cursor:pointer;text-decoration:none;background:var(--accent);color:var(--accent-ink);white-space:nowrap}
.btn:hover{filter:brightness(1.06)}
.btn.ghost{background:transparent;color:var(--ink);border:1.5px solid var(--line)}
.btn.ghost:hover{background:var(--surface-2)}
.btn.sm{min-height:36px;padding:.4em .8em;font-size:.88rem}
.btn[disabled]{opacity:.5;cursor:not-allowed}
.seg{display:inline-flex;border:1.5px solid var(--line);border-radius:var(--radius-sm);overflow:hidden;flex-wrap:wrap}
.seg button{font:inherit;font-weight:650;font-size:.88rem;border:0;background:transparent;color:var(--ink-2);padding:.5em .85em;cursor:pointer;min-height:38px}
.seg button[aria-pressed="true"]{background:var(--ink);color:var(--bg)}
.check{display:inline-flex;align-items:center;gap:7px;font-weight:600;font-size:.9rem;cursor:pointer;user-select:none}
.check input{accent-color:var(--accent);width:17px;height:17px}
.drop{position:relative;overflow:hidden;display:block;border:2px dashed var(--line);border-radius:var(--radius);padding:26px 16px;text-align:center;cursor:pointer;background:var(--bg);transition:border-color .15s,background .15s}
.drop:hover,.drop.over{border-color:var(--accent);background:var(--accent-soft)}
.drop strong{display:block;font-size:1.05rem}
.drop span{color:var(--muted);font-size:.9rem}
.drop input{position:absolute;width:1px;height:1px;opacity:0}
.or{display:flex;align-items:center;gap:12px;color:var(--muted);font-size:.85rem;margin:14px 0}
.or::before,.or::after{content:"";height:1px;background:var(--line);flex:1}
.note{font-size:.88rem;color:var(--muted)}
.msg{padding:.75em 1em;border-radius:var(--radius-sm);font-size:.92rem;margin:12px 0 0;font-weight:600}
.msg.ok{background:color-mix(in srgb,var(--ok) 14%,transparent);color:var(--ok)}
.msg.warn{background:color-mix(in srgb,var(--warn) 16%,transparent);color:var(--warn)}
.msg.bad{background:color-mix(in srgb,var(--bad) 14%,transparent);color:var(--bad)}
.hidden{display:none!important}
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:10px;margin:14px 0}
.stat{background:var(--bg);border:1px solid var(--line);border-radius:var(--radius-sm);padding:10px 12px}
.stat b{display:block;font-size:1.15rem}
.stat span{font-size:.8rem;color:var(--muted)}
.toast{position:fixed;left:50%;bottom:22px;transform:translateX(-50%) translateY(20px);opacity:0;background:var(--ink);color:var(--bg);padding:.65em 1.1em;border-radius:10px;font-weight:650;font-size:.92rem;transition:.2s;z-index:50;pointer-events:none}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* Downloader results */
.thumbs{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:14px;margin-top:20px}
.thumb{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--bg);display:flex;flex-direction:column}
.thumb .img{aspect-ratio:16/9;background:var(--surface-2);overflow:hidden}
.thumb img{width:100%;height:100%;object-fit:cover}
.thumb .meta{padding:10px 12px;display:grid;gap:8px}
.thumb .meta>div:first-child{display:flex;justify-content:space-between;gap:8px;font-size:.9rem}
.thumb .meta b{font-weight:750}
.thumb .meta span{color:var(--muted)}
.thumb .acts{display:flex;gap:6px;flex-wrap:wrap}
.thumb.na{opacity:.55}
.badge{display:inline-block;font-size:.72rem;font-weight:800;padding:.15em .5em;border-radius:6px;background:var(--accent-soft);color:var(--accent);text-transform:uppercase;letter-spacing:.04em}
.next-steps{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}

/* Mock YouTube-like surfaces (generic, not branded) */
.mock{border-radius:var(--radius);padding:18px;margin-top:16px;--m-bg:#ffffff;--m-ink:#0f0f0f;--m-sub:#606060;--m-sk:#e9e9e9;background:var(--m-bg);color:var(--m-ink);border:1px solid var(--line)}
.mock.dark{--m-bg:#0f0f0f;--m-ink:#f1f1f1;--m-sub:#aaaaaa;--m-sk:#272727}
.mock h3{margin:0 0 12px;font-size:.8rem;text-transform:uppercase;letter-spacing:.08em;color:var(--m-sub)}
.v-thumb{position:relative;aspect-ratio:16/9;border-radius:12px;overflow:hidden;background:var(--m-sk)}
.v-thumb img{width:100%;height:100%;object-fit:cover}
.v-dur{position:absolute;right:6px;bottom:6px;background:rgba(0,0,0,.82);color:#fff;font-size:12px;font-weight:600;padding:1px 5px;border-radius:4px;line-height:1.5}
.v-sk{background:linear-gradient(135deg,var(--m-sk),color-mix(in srgb,var(--m-sk) 70%,#888))}
.v-row{display:flex;gap:10px;margin-top:10px}
.v-av{width:36px;height:36px;border-radius:50%;background:var(--m-sk);flex:none}
.v-title{font-weight:600;font-size:15px;line-height:1.35;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin:0}
.v-sub{font-size:13px;color:var(--m-sub);line-height:1.5}
.v-line{height:10px;border-radius:5px;background:var(--m-sk);margin:6px 0}
.grid-home{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
@media (max-width:700px){.grid-home{grid-template-columns:1fr 1fr}.grid-home>:nth-child(3){display:none}}
.search-row{display:grid;grid-template-columns:minmax(0,360px) 1fr;gap:14px;margin-bottom:14px}
@media (max-width:600px){.search-row{grid-template-columns:1fr}}
.mobile-frame{max-width:380px;margin:0 auto}
.mobile-frame .v-thumb{border-radius:0}
.side-row{display:grid;grid-template-columns:168px 1fr;gap:10px;margin-bottom:10px;max-width:420px}
.side-row .v-thumb{border-radius:8px}
.side-row .v-title{font-size:14px}

/* Stage + overlays */
.stage{position:relative;width:100%;aspect-ratio:16/9;background:#000;border-radius:var(--radius-sm);overflow:hidden;margin-top:16px}
.stage img{width:100%;height:100%;object-fit:contain}
.ov{position:absolute;pointer-events:none}
.ov-time{right:1.2%;bottom:2.4%;width:9.5%;height:7.5%;background:rgba(0,0,0,.82);border-radius:6px;color:#fff;font:700 clamp(9px,1.6vw,16px)/1 var(--font);display:grid;place-items:center;outline:2px dashed #ffcf33;outline-offset:2px}
.ov-prog{left:0;right:0;bottom:0;height:3.2%;background:rgba(255,255,255,.35)}
.ov-prog::after{content:"";position:absolute;inset:0 45% 0 0;background:#ff2b2b}
.ov-icons{right:1.6%;top:2.6%;display:grid;gap:6px;width:5.5%}
.ov-icons i{display:block;aspect-ratio:1;background:rgba(0,0,0,.75);border-radius:4px;outline:2px dashed #ffcf33}
.ov-thirds{inset:0;background:linear-gradient(to right,transparent calc(33.333% - 1px),rgba(255,255,255,.55) calc(33.333% - 1px) calc(33.333% + 1px),transparent calc(33.333% + 1px) calc(66.666% - 1px),rgba(255,255,255,.55) calc(66.666% - 1px) calc(66.666% + 1px),transparent calc(66.666% + 1px)),linear-gradient(to bottom,transparent calc(33.333% - 1px),rgba(255,255,255,.55) calc(33.333% - 1px) calc(33.333% + 1px),transparent calc(33.333% + 1px) calc(66.666% - 1px),rgba(255,255,255,.55) calc(66.666% - 1px) calc(66.666% + 1px),transparent calc(66.666% + 1px))}
.ov-safe{left:6%;right:12%;top:8%;bottom:14%;border:2px dashed #3ee07a;border-radius:4px}
.ov-safe::after{content:"Text-safe area";position:absolute;left:6px;top:4px;font:700 11px var(--font);color:#3ee07a;background:rgba(0,0,0,.6);padding:1px 5px;border-radius:4px}
.sizes{display:flex;flex-wrap:wrap;gap:16px;align-items:flex-end;margin-top:16px}
.sizes figure{margin:0}
.sizes figcaption{font-size:.78rem;color:var(--muted);margin-top:4px}
.sizes .v-thumb{border-radius:6px}

/* Palette */
.swatches{display:grid;grid-template-columns:repeat(auto-fill,minmax(120px,1fr));gap:10px;margin-top:14px}
.sw{border:1px solid var(--line);border-radius:var(--radius-sm);overflow:hidden;background:var(--bg);cursor:pointer;text-align:left;font:inherit;color:inherit;padding:0}
.sw i{display:block;height:64px}
.sw span{display:block;padding:7px 9px;font:600 .86rem var(--mono)}
.sw small{display:block;padding:0 9px 8px;color:var(--muted);font-size:.75rem}
.contrast-demo{border-radius:var(--radius-sm);padding:22px;font-weight:850;font-size:clamp(1.4rem,4vw,2.4rem);letter-spacing:-.02em;margin-top:12px;text-align:center}
.pill{display:inline-block;font-size:.8rem;font-weight:800;padding:.25em .65em;border-radius:99px;margin:3px 4px 0 0}
.pill.pass{background:color-mix(in srgb,var(--ok) 16%,transparent);color:var(--ok)}
.pill.fail{background:color-mix(in srgb,var(--bad) 14%,transparent);color:var(--bad)}

/* Compare */
.slots{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:12px}
.slot{position:relative}
.slot .drop{padding:18px 10px;aspect-ratio:16/9;display:grid;place-content:center}
.slot .drop img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;border-radius:var(--radius)}
.slot .tag{position:absolute;left:8px;top:8px;z-index:2;background:var(--ink);color:var(--bg);font-weight:850;font-size:.8rem;padding:.15em .55em;border-radius:6px}
.fx-gray img{filter:grayscale(1)}
.fx-blur img{filter:blur(3px)}
.fx-gray.fx-blur img{filter:grayscale(1) blur(3px)}

/* Banner */
.banner-stage{position:relative;width:100%;aspect-ratio:16/9;background:var(--surface-2);border-radius:var(--radius-sm);overflow:hidden;margin-top:16px}
.banner-stage img{width:100%;height:100%;object-fit:fill}
.bz{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);border:2px dashed;pointer-events:none}
.bz span{position:absolute;left:4px;top:2px;font:700 11px var(--font);background:rgba(0,0,0,.65);color:#fff;padding:1px 5px;border-radius:4px;white-space:nowrap}
.bz-desk{width:100%;height:29.375%;border-color:#4db3ff}
.bz-tab{width:72.4609%;height:29.375%;border-color:#ffcf33}
.bz-safe{width:60.3906%;height:29.375%;border-color:#3ee07a;border-width:3px}
.bz-safe span{top:auto;bottom:2px}
.crop-desk{aspect-ratio:2560/423;overflow:hidden;border-radius:8px;position:relative;background:var(--surface-2)}
.crop-desk img{position:absolute;width:100%;top:50%;transform:translateY(-50%)}
.crop-mob{aspect-ratio:1546/423;overflow:hidden;border-radius:8px;position:relative;max-width:420px;background:var(--surface-2)}
.crop-mob img{position:absolute;width:165.59%;left:50%;top:50%;transform:translate(-50%,-50%);max-width:none}
.checks{list-style:none;padding:0;margin:14px 0 0;display:grid;gap:6px}
.checks li{display:flex;gap:8px;align-items:baseline;font-size:.95rem}
.checks li::before{font-weight:900;width:1.2em;flex:none}
.checks li.pass::before{content:"✓";color:var(--ok)}
.checks li.fail::before{content:"✕";color:var(--bad)}
.checks li.warn::before{content:"!";color:var(--warn)}

/* Article */
.content{padding-bottom:20px}
.content article{max-width:760px}
.content article p,.content article li{color:var(--ink-2)}
.content article ul,.content article ol{padding-left:1.25em}
.content article li{margin-bottom:.4em}
.content article strong{color:var(--ink)}
.spec{width:100%;border-collapse:collapse;margin:14px 0 20px;font-size:.95rem;background:var(--surface);border-radius:var(--radius-sm);overflow:hidden;border:1px solid var(--line)}
.spec th,.spec td{text-align:left;padding:.65em .9em;border-bottom:1px solid var(--line);vertical-align:top}
.spec th{background:var(--surface-2);font-weight:750}
.spec tr:last-child td{border-bottom:0}
.table-wrap{overflow-x:auto}
.callout{border-left:4px solid var(--accent);background:var(--surface);padding:14px 16px;border-radius:0 var(--radius-sm) var(--radius-sm) 0;margin:18px 0}
.callout p:last-child{margin:0}
.faq details{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-sm);margin-bottom:8px;padding:0 16px}
.faq summary{cursor:pointer;font-weight:700;padding:14px 0;list-style:none;display:flex;justify-content:space-between;gap:12px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-weight:800;color:var(--accent)}
.faq details[open] summary::after{content:"–"}
.faq details p{color:var(--ink-2);margin:0 0 14px}
.toc{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-sm);padding:14px 18px;margin:18px 0}
.toc strong{display:block;margin-bottom:6px}
.toc ol{margin:0;padding-left:1.2em}
.updated{font-size:.88rem;color:var(--muted)}

/* Cards */
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:14px;margin:16px 0}
.card{display:flex;flex-direction:column;gap:8px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:18px;text-decoration:none;color:var(--ink);transition:transform .15s,border-color .15s}
.card:hover{transform:translateY(-2px);border-color:var(--accent)}
.card .ic{width:40px;height:40px;border-radius:10px;background:var(--accent-soft);color:var(--accent);display:grid;place-items:center}
.card .ic svg{width:22px;height:22px}
.card b{font-size:1.05rem;letter-spacing:-.01em}
.card span{color:var(--ink-2);font-size:.92rem;line-height:1.5}

/* Footer */
.site-footer{margin-top:56px;border-top:1px solid var(--line);background:var(--surface);padding:34px 0 26px;font-size:.92rem}
.foot-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:24px}
@media (max-width:760px){.foot-grid{grid-template-columns:1fr 1fr}.foot-grid>:first-child{grid-column:1/-1}}
.site-footer h2{font-size:.82rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin:0 0 10px}
.site-footer ul{list-style:none;padding:0;margin:0;display:grid;gap:6px}
.site-footer a{color:var(--ink-2);text-decoration:none}
.site-footer a:hover{color:var(--accent)}
.legal{margin-top:26px;padding-top:16px;border-top:1px solid var(--line);color:var(--muted);font-size:.82rem}
.legal p{margin:0 0 .4em}

@media (prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}