/* JetAI — independent AI pricing lab. Shared stylesheet.
   Dark-first "lab" theme (mint on deep navy); OS light scheme follows via overrides. */
:root{
  --bg:#0b1220; --panel:#101a2e; --panel2:#0d1526; --line:#1e2c48;
  --ink:#e8eefc; --muted:#93a1bd; --accent:#38f0a8; --accent2:#6cb2ff;
  --warn:#ffbe5c; --ok:#38f0a8; --danger:#ff7a7a;
  --ok-bg:#0e2a1f; --ok-border:#1f5c40;
  --warn-bg:#2c2110; --warn-border:#6b4d1f;
  --radius:12px;
  --font:ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font);line-height:1.65;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
a{color:var(--accent2)}
a:hover{color:var(--accent)}
a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible,select:focus-visible,
[tabindex]:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:6px}

/* Skip link */
.skip{position:absolute;left:16px;top:-60px;z-index:100;background:var(--accent);color:#06281b;
  font-weight:800;font-size:.9rem;padding:10px 18px;border-radius:10px;transition:top .18s ease;text-decoration:none}
.skip:focus{top:12px}

/* Header */
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}
.wrap.article{max-width:840px}
header.site{position:sticky;top:0;z-index:50;background:rgba(11,18,32,.92);
  backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;gap:16px;padding:14px 0}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font-weight:800;font-size:1.25rem;letter-spacing:.5px;flex:none}
.brand svg{width:30px;height:30px}
.tag{font-size:.72rem;color:var(--muted);border:1px solid var(--line);border-radius:999px;padding:2px 10px;white-space:nowrap}
nav.links{margin-left:auto;display:flex;gap:4px;overflow-x:auto;scrollbar-width:none}
nav.links::-webkit-scrollbar{display:none}
nav.links a{color:var(--muted);text-decoration:none;font-size:.9rem;padding:6px 10px;border-radius:8px;white-space:nowrap}
nav.links a:hover{color:var(--ink);background:var(--panel)}

/* Hero */
.hero{padding:64px 0 40px;text-align:center}
.hero h1{font-size:clamp(1.9rem,4.6vw,3rem);line-height:1.14;margin:0 0 14px;letter-spacing:-.02em;font-weight:800}
.hero h1 .grad{background:linear-gradient(90deg,var(--accent),var(--accent2));
  -webkit-background-clip:text;background-clip:text;color:transparent}
.hero p{color:var(--muted);max-width:660px;margin:0 auto 22px;font-size:1.05rem}
.verified-badge{display:inline-flex;align-items:center;gap:8px;background:var(--ok-bg);border:1px solid var(--ok-border);
  color:var(--accent);font-weight:700;font-size:.95rem;border-radius:999px;padding:8px 18px}
.verified-badge .dot{width:9px;height:9px;border-radius:50%;background:var(--accent);box-shadow:0 0 10px var(--accent);animation:pulse 2.4s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.45}}
.stats{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-top:24px}
.stat{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:12px 20px;min-width:160px}
.stat b{display:block;font-size:1.5rem;font-variant-numeric:tabular-nums}
.stat span{color:var(--muted);font-size:.8rem}

/* Sections */
section{padding:40px 0;border-top:1px solid var(--line)}
section h2{font-size:1.6rem;margin:0 0 8px;letter-spacing:-.01em}
section .sub{color:var(--muted);margin:0 0 22px;max-width:740px}

/* Table controls */
.controls{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:16px;align-items:center}
.controls input[type=search]{flex:1;min-width:220px;background:var(--panel2);border:1px solid var(--line);color:var(--ink);
  border-radius:10px;padding:10px 14px;font-size:1rem}
.controls input[type=search]::placeholder{color:var(--muted)}
.chips{display:flex;gap:8px;flex-wrap:wrap}
.chip{border:1px solid var(--line);background:var(--panel2);color:var(--muted);border-radius:999px;
  padding:6px 14px;font-size:.85rem;cursor:pointer;transition:background .15s ease,color .15s ease}
.chip:hover{color:var(--ink);border-color:var(--accent2)}
.chip.active{background:var(--accent);border-color:var(--accent);color:#06281b;font-weight:700}

/* Pricing table */
.table-scroll{overflow-x:auto;border:1px solid var(--line);border-radius:14px;background:var(--panel);margin:20px 0}
table{width:100%;border-collapse:collapse;min-width:720px;font-size:.95rem}
thead th{background:var(--panel2);text-align:left;padding:12px 14px;cursor:pointer;user-select:none;white-space:nowrap;
  font-size:.8rem;text-transform:uppercase;letter-spacing:.6px;color:var(--muted);position:sticky;top:0}
thead th:hover{color:var(--ink)}
thead th .arrow{color:var(--accent)}
tbody td{padding:11px 14px;border-top:1px solid var(--line)}
tbody tr:hover{background:rgba(108,178,255,.05)}
td.num,th.num{text-align:right;font-variant-numeric:tabular-nums}
.model-name{font-weight:700}
.provider{color:var(--muted);font-size:.88rem}
.pill{display:inline-block;font-size:.72rem;font-weight:700;border-radius:999px;padding:2px 10px}
.pill.ok{background:var(--ok-bg);color:var(--accent);border:1px solid var(--ok-border)}
.pill.warn{background:var(--warn-bg);color:var(--warn);border:1px solid var(--warn-border)}
td .note{color:var(--muted);font-size:.78rem;display:block;max-width:320px}

/* Picker / cards */
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:22px}
.card h3{margin:0 0 10px;font-size:1.1rem}
.quiz label{display:block;font-size:.85rem;color:var(--muted);margin:14px 0 6px}
.quiz select,.quiz input[type=range]{width:100%}
.quiz select{background:var(--panel2);border:1px solid var(--line);color:var(--ink);border-radius:10px;padding:10px;font-size:1rem}
.quiz button{margin-top:18px;background:var(--accent);color:#06281b;border:none;border-radius:10px;
  padding:12px 22px;font-weight:800;font-size:1rem;cursor:pointer;width:100%;transition:filter .15s ease,transform .15s ease}
.quiz button:hover{filter:brightness(1.08);transform:translateY(-1px)}
.result{margin-top:18px;border:1px solid var(--ok-border);background:var(--ok-bg);border-radius:var(--radius);padding:16px;display:none}
.result.show{display:block}
.result h4{margin:0 0 6px;color:var(--accent)}
.result .cost{font-size:1.4rem;font-weight:800}
.result p{margin:8px 0;color:var(--muted);font-size:.92rem}

/* Explainer */
.formula{background:var(--panel2);border:1px solid var(--line);border-radius:var(--radius);
  padding:16px 18px;font-family:var(--mono);font-size:.95rem;margin:16px 0;overflow-x:auto}
.explainer ul{margin:10px 0;padding-left:22px;color:var(--muted)}
.explainer li{margin:8px 0}
.explainer b{color:var(--ink)}

/* Price moves */
.moves{display:flex;flex-direction:column;gap:12px}
.move{background:var(--panel);border:1px solid var(--line);border-left:4px solid var(--accent);border-radius:10px;padding:14px 18px}
.move .date{color:var(--muted);font-size:.8rem;font-weight:700;text-transform:uppercase;letter-spacing:.5px}
.move h4{margin:4px 0 6px}
.move p{margin:0;color:var(--muted);font-size:.93rem}
.move a{font-size:.85rem}

/* Details / FAQ */
details{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:12px 16px;margin:10px 0}
details summary{cursor:pointer;font-weight:700}
details p{color:var(--muted);font-size:.93rem}

/* Article pages */
.article-meta{color:var(--muted);font-size:.85rem;margin:28px 0 0}
article h1,main h1{font-size:clamp(1.8rem,4vw,2.6rem);line-height:1.2;margin:12px 0 16px;letter-spacing:-.015em;font-weight:800}
article h1 .grad,main h1 .grad{background:linear-gradient(90deg,var(--accent),var(--accent2));
  -webkit-background-clip:text;background-clip:text;color:transparent}
.lede{color:var(--muted);font-size:1.08rem;max-width:680px}
article h2{font-size:1.55rem;margin:44px 0 8px}
article h3{font-size:1.2rem;margin:28px 0 6px}
article p{margin:12px 0}
article ul,article ol{margin:12px 0;padding-left:22px;color:var(--muted)}
article li{margin:8px 0}
article li b,article p b{color:var(--ink)}
.note{color:var(--muted);font-size:.85rem;display:block}
.callout{background:var(--ok-bg);border:1px solid var(--ok-border);border-radius:var(--radius);padding:16px 18px;margin:20px 0;color:var(--muted)}
.callout b{color:var(--accent)}
.related{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:20px 22px;margin:36px 0}
.related h2{font-size:1.2rem;margin:0 0 8px}
.related ul{list-style:none;padding:0;margin:8px 0}
.related li{margin:8px 0}
.faq details p{color:var(--muted);font-size:.95rem}

/* Footer */
footer.site{border-top:1px solid var(--line);padding:28px 0 40px;color:var(--muted);font-size:.88rem}
footer.site .wrap{display:flex;gap:16px;flex-wrap:wrap;align-items:center;justify-content:space-between}
footer.site a{color:var(--muted)}
footer.site a:hover{color:var(--accent)}

/* Responsive */
@media(max-width:720px){
  .grid2{grid-template-columns:1fr}
  .hero{padding:44px 0 30px}
  .tag{display:none}
  .brand{font-size:1.1rem}
  nav.links a{font-size:.85rem}
}

/* Light scheme — follows the OS */
@media (prefers-color-scheme: light){
  :root{
    --bg:#f4f8f6; --panel:#ffffff; --panel2:#edf3f0; --line:#d6e2dc;
    --ink:#15241c; --muted:#5c6f65; --accent:#0d8a58; --accent2:#2f6fd0;
    --warn:#8a5a13; --ok:#0d8a58; --danger:#b34040;
    --ok-bg:#e0f2e9; --ok-border:#a3d8bf;
    --warn-bg:#fbf0d8; --warn-border:#dfc48d;
  }
  header.site{background:rgba(244,248,246,.94)}
  .hero h1 .grad{background:none;color:var(--accent);-webkit-text-fill-color:var(--accent)}
  article h1 .grad,main h1 .grad{background:none;color:var(--accent);-webkit-text-fill-color:var(--accent)}
  .quiz button,.chip.active{color:#fff}
  .verified-badge .dot{box-shadow:none}
  tbody tr:hover{background:rgba(47,111,208,.06)}
}

/* Print */
@media print{
  header.site,.skip,.controls,.quiz,.related,details summary::marker{display:none!important}
  body{background:#fff;color:#111}
  section{border-top:none;padding:18px 0}
  .table-scroll{border:1px solid #999;overflow:visible}
  table{min-width:0;font-size:9pt}
  a{color:#0d5c3d}
  a[href^="http"]::after{content:" (" attr(href) ")";font-size:.8em;color:#555}
}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  .verified-badge .dot{animation:none}
}