/* AI Universe — shared design tokens (blueprint §2, §9) */
:root{
  --bg:#11152B; --bg2:#0B0E1F; --card:rgba(255,255,255,.06); --card2:rgba(255,255,255,.09);
  --border:rgba(255,255,255,.12); --text:#F2F4FF; --muted:#A7AECB; --muted2:#7C84A3;
  --purple:#7657FF; --purple2:#9B7BFF; --cyan:#29C7D8; --blue:#4E8DFF;
  --green:#2FD67A; --amber:#FFB224; --red:#FF5C6C; --grey:#8A90A6;
  --radius:20px; --radius-sm:14px;
  --font:'Inter','Manrope',system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;
}
[data-theme="light"]{
  --bg:#F4F6FF; --bg2:#FFFFFF; --card:#FFFFFF; --card2:#EEF1FF;
  --border:rgba(17,21,43,.12); --text:#141A33; --muted:#4A5170; --muted2:#6B7194;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--text);font-family:var(--font);font-size:15px;line-height:1.6;-webkit-tap-highlight-color:transparent}
a{color:var(--cyan);text-decoration:none}
a:hover{text-decoration:underline}
button{font-family:var(--font);cursor:pointer;border:none;background:none;color:inherit}
input,select,textarea{font-family:var(--font);font-size:15px;color:var(--text)}
img{max-width:100%}
.wrap{max-width:1120px;margin:0 auto;padding:0 20px}
.badge{display:inline-flex;align-items:center;gap:5px;font-size:11px;font-weight:700;letter-spacing:.04em;text-transform:uppercase;padding:4px 10px;border-radius:999px;white-space:nowrap}
.badge.FREE{background:rgba(47,214,122,.16);color:var(--green);border:1px solid rgba(47,214,122,.4)}
.badge.LIMITED{background:rgba(255,178,36,.14);color:var(--amber);border:1px solid rgba(255,178,36,.4)}
.badge.OPEN{background:rgba(78,141,255,.15);color:var(--blue);border:1px solid rgba(78,141,255,.4)}
.badge.PAID{background:rgba(255,92,108,.14);color:var(--red);border:1px solid rgba(255,92,108,.4)}
.badge.UNKNOWN,.badge.UNAVAILABLE{background:rgba(138,144,166,.16);color:var(--grey);border:1px solid rgba(138,144,166,.4)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 24px;border-radius:14px;font-weight:700;font-size:15px;min-height:48px;transition:transform .15s,opacity .15s;text-decoration:none}
.btn:active{transform:scale(.98)}
.btn-primary{background:linear-gradient(135deg,var(--purple),#5A3DFF 55%,var(--cyan));color:#fff;box-shadow:0 8px 28px rgba(118,87,255,.45)}
.btn-primary:hover{text-decoration:none;opacity:.92}
.btn-ghost{border:1px solid var(--border);background:var(--card);color:var(--text)}
.btn-ghost:hover{text-decoration:none;background:var(--card2)}
.btn-sm{padding:9px 16px;min-height:40px;font-size:14px;border-radius:11px}
.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px)}
.muted{color:var(--muted)} .small{font-size:13px} .tiny{font-size:12px}
h1,h2,h3{line-height:1.25}
.grad{background:linear-gradient(90deg,var(--purple2),var(--cyan));-webkit-background-clip:text;background-clip:text;color:transparent}
/* header */
header.site{position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--bg) 82%,transparent);backdrop-filter:blur(14px);border-bottom:1px solid var(--border)}
.nav{display:flex;align-items:center;gap:26px;height:66px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;color:var(--text);letter-spacing:.01em}
.logo:hover{text-decoration:none}
.logo-mark{width:36px;height:36px;border-radius:12px;background:conic-gradient(from 210deg,var(--purple),var(--cyan),var(--purple));display:flex;align-items:center;justify-content:center;font-size:19px;box-shadow:0 0 22px rgba(118,87,255,.55)}
.nav-links{display:flex;gap:22px;margin-left:8px}
.nav-links a{color:var(--muted);font-weight:600;font-size:14px}
.nav-links a:hover{color:var(--text);text-decoration:none}
.nav-right{margin-left:auto;display:flex;gap:10px;align-items:center}
@media(max-width:820px){.nav-links{display:none}}
/* hero */
.hero{padding:72px 0 40px;position:relative;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center}
@media(max-width:860px){.hero-grid{grid-template-columns:1fr}.hero{padding:44px 0 28px}}
.hero h1{font-size:clamp(34px,5.4vw,58px);font-weight:800;letter-spacing:-.02em}
.hero p.lead{font-size:17px;color:var(--muted);margin:18px 0 26px;max-width:540px}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap}
.hero-note{margin-top:16px}
.orb-wrap{position:relative;display:flex;justify-content:center}
.orb{width:min(320px,72vw);aspect-ratio:1;border-radius:50%;background:radial-gradient(circle at 35% 30%,#B79CFF 0%,var(--purple) 34%,#1B2A6B 62%,transparent 78%),radial-gradient(circle at 70% 75%,rgba(41,199,216,.8),transparent 55%);box-shadow:0 0 90px rgba(118,87,255,.55),inset 0 0 60px rgba(255,255,255,.12);animation:float 6s ease-in-out infinite;position:relative}
.orb::after{content:"✦ AI";position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font-size:44px;font-weight:800;color:#fff;text-shadow:0 2px 18px rgba(0,0,0,.4)}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-14px)}}
@media(prefers-reduced-motion:reduce){.orb{animation:none}}
.hero-cards{position:absolute;inset:auto 0 -8px 0;display:flex;gap:10px;justify-content:center;flex-wrap:wrap}
.mini-model{background:rgba(17,21,43,.85);border:1px solid var(--border);border-radius:12px;padding:8px 12px;font-size:13px;font-weight:600;display:flex;gap:8px;align-items:center;backdrop-filter:blur(8px)}
/* sections */
section{padding:56px 0}
.sec-head{max-width:640px;margin-bottom:28px}
.sec-head h2{font-size:clamp(24px,3.4vw,34px);font-weight:800}
.sec-head p{color:var(--muted);margin-top:10px}
.strip{display:flex;flex-wrap:wrap;gap:10px}
.provider-chip{background:var(--card);border:1px solid var(--border);border-radius:999px;padding:9px 16px;font-weight:700;font-size:14px}
.feat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px}
.feat{padding:22px}
.feat .ico{font-size:26px;margin-bottom:12px}
.feat h3{font-size:17px;margin-bottom:6px}
.feat p{color:var(--muted);font-size:14px}
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px;counter-reset:step}
.step{padding:22px;position:relative}
.step .num{width:34px;height:34px;border-radius:50%;background:linear-gradient(135deg,var(--purple),var(--cyan));display:flex;align-items:center;justify-content:center;font-weight:800;margin-bottom:12px}
.model-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px}
.model-card{padding:18px;cursor:pointer;transition:transform .18s,border-color .18s}
.model-card:hover{transform:translateY(-2px);border-color:rgba(118,87,255,.55)}
.model-card h3{font-size:16px;margin:8px 0 4px}
.model-card .meta{color:var(--muted);font-size:13px}
.model-card .row{display:flex;justify-content:space-between;align-items:center;gap:8px}
.model-card .foot{margin-top:12px;display:flex;justify-content:space-between;align-items:center}
.phone-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:20px}
.phone{border:1px solid var(--border);border-radius:28px;background:var(--bg2);padding:14px;max-width:280px;margin:0 auto;width:100%}
.phone .screen{border:1px solid var(--border);border-radius:20px;overflow:hidden;background:var(--bg);min-height:420px;display:flex;flex-direction:column}
.phone .notch{height:22px;display:flex;align-items:center;justify-content:center;font-size:10px;color:var(--muted2)}
.phone .ph-head{padding:12px 14px;font-weight:800}
.phone .ph-search{margin:0 12px 10px;background:var(--card2);border-radius:10px;padding:9px 12px;color:var(--muted);font-size:13px}
.ph-chiprow{display:flex;gap:6px;padding:0 12px 10px;flex-wrap:wrap}
.ph-chip{background:var(--card2);border-radius:999px;padding:5px 10px;font-size:11px;font-weight:700}
.ph-chip.on{background:var(--purple);color:#fff}
.ph-card{margin:0 12px 10px;background:var(--card);border:1px solid var(--border);border-radius:12px;padding:10px 12px}
.ph-card b{font-size:13px}
.ph-card span{display:block;color:var(--muted);font-size:11px}
.ph-bubble{margin:8px 12px;padding:10px 12px;border-radius:12px;font-size:12.5px;line-height:1.5}
.ph-bubble.user{background:var(--purple);color:#fff;margin-left:44px;border-bottom-right-radius:4px}
.ph-bubble.ai{background:var(--card2);margin-right:44px;border-bottom-left-radius:4px}
.ph-nav{margin-top:auto;display:flex;justify-content:space-around;padding:10px 4px;border-top:1px solid var(--border);font-size:11px;color:var(--muted)}
.ph-nav b{color:var(--purple2)}
.faq-item{border:1px solid var(--border);border-radius:14px;background:var(--card);margin-bottom:10px;overflow:hidden}
.faq-item summary{padding:16px 18px;cursor:pointer;font-weight:700;list-style:none}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item p{padding:0 18px 16px;color:var(--muted);font-size:14px}
footer.site{border-top:1px solid var(--border);padding:40px 0 28px;margin-top:20px}
.foot-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:24px}
@media(max-width:760px){.foot-grid{grid-template-columns:1fr 1fr}}
footer.site a{color:var(--muted);font-size:14px;display:block;margin-bottom:8px}
footer.site h4{margin-bottom:12px;font-size:14px}
.notice{background:rgba(255,178,36,.08);border:1px solid rgba(255,178,36,.35);border-radius:14px;padding:14px 16px;font-size:14px}
.notice b{color:var(--amber)}