:root{
  --bg:#0a0a0a; --bg2:#111114; --fg:#f3f4f6; --muted:#9ca3af; --line:rgba(255,255,255,.08);
  --primary:#7c3aed; --primary2:#06b6d4; --accent:#f59e0b;
  --card:rgba(255,255,255,.04); --card2:rgba(255,255,255,.06);
  --shadow:0 20px 60px -20px rgba(124,58,237,.35);
  --radius:14px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bg);color:var(--fg);font-family:-apple-system,BlinkMacSystemFont,"SF Pro Display","Segoe UI",Roboto,Helvetica,Arial,sans-serif;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%}

/* nav */
.nav{position:sticky;top:0;z-index:50;display:flex;align-items:center;gap:24px;padding:14px 28px;background:rgba(10,10,10,.7);backdrop-filter:blur(20px);border-bottom:1px solid var(--line)}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px;letter-spacing:-.02em}
.nav-links{display:flex;gap:24px;margin-left:24px}
.nav-links a{color:var(--muted);font-size:14px;font-weight:500;transition:color .15s}
.nav-links a:hover{color:var(--fg)}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:10px}
.lang-sel,.cur-sel{background:var(--card);border:1px solid var(--line);color:var(--fg);padding:7px 10px;border-radius:8px;font-size:13px;cursor:pointer}

/* buttons */
.btn-primary{display:inline-block;background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff;padding:10px 18px;border-radius:10px;font-weight:600;font-size:14px;transition:transform .15s,box-shadow .15s;border:0;cursor:pointer}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 10px 30px -10px rgba(124,58,237,.6)}
.btn-primary.big{padding:14px 28px;font-size:16px}
.btn-ghost{display:inline-block;background:transparent;color:var(--fg);padding:10px 18px;border-radius:10px;font-weight:500;font-size:14px;border:1px solid var(--line);transition:background .15s;cursor:pointer}
.btn-ghost:hover{background:var(--card)}
.btn-ghost.big{padding:14px 28px;font-size:16px}

/* hero */
.hero{position:relative;padding:100px 28px 80px;overflow:hidden;text-align:center}
.hero-bg{position:absolute;inset:0;background:
  radial-gradient(ellipse 80% 50% at 50% 0%, rgba(124,58,237,.25), transparent 60%),
  radial-gradient(ellipse 60% 40% at 80% 30%, rgba(6,182,212,.18), transparent 60%),
  radial-gradient(ellipse 50% 30% at 20% 60%, rgba(245,158,11,.12), transparent 60%);
  z-index:-1}
.hero-content{max-width:920px;margin:0 auto;position:relative;z-index:1}
.badge{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;background:rgba(124,58,237,.15);border:1px solid rgba(124,58,237,.3);border-radius:99px;font-size:13px;color:#c4b5fd;margin-bottom:24px}
.badge .dot{width:6px;height:6px;background:#22c55e;border-radius:50%;animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.4}}
.hero h1{font-size:clamp(36px,6vw,72px);font-weight:800;letter-spacing:-.03em;line-height:1.05;margin:0 0 20px;background:linear-gradient(180deg,#fff,#a3a3a3);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.lead{font-size:clamp(16px,2vw,21px);color:var(--muted);max-width:680px;margin:0 auto 36px;line-height:1.6}
.hero-cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-bottom:48px}
.hero-trust{display:flex;gap:48px;justify-content:center;flex-wrap:wrap;color:var(--muted);font-size:14px}
.hero-trust b{color:var(--fg);font-size:22px;display:block;font-weight:700;background:linear-gradient(135deg,var(--primary),var(--primary2));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}

/* sections */
.section{max-width:1200px;margin:0 auto;padding:80px 28px}
.section h2{font-size:clamp(28px,4vw,42px);font-weight:700;letter-spacing:-.02em;margin:0 0 12px;text-align:center}
.section .muted{color:var(--muted);text-align:center;max-width:640px;margin:0 auto 48px;font-size:17px}
.section-alt{background:linear-gradient(180deg,transparent,var(--bg2),transparent)}
.section-cta{padding:60px 28px}
.cta-box{max-width:780px;margin:0 auto;background:linear-gradient(135deg,rgba(124,58,237,.15),rgba(6,182,212,.1));border:1px solid rgba(124,58,237,.3);border-radius:20px;padding:60px 40px;text-align:center}
.cta-box h2{margin:0 0 12px}
.cta-box p{color:var(--muted);margin:0 0 28px;font-size:17px}

/* grid */
.grid{display:grid;gap:18px}
.features{grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px;transition:border-color .15s,transform .15s}
.card:hover{border-color:rgba(124,58,237,.4);transform:translateY(-2px)}
.card .icon{font-size:30px;margin-bottom:12px}
.card h3{margin:0 0 8px;font-size:18px}
.card p{margin:0;color:var(--muted);font-size:14px;line-height:1.55}

/* logos */
.logos{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;max-width:900px;margin:0 auto}
.logos span{padding:10px 16px;background:var(--card);border:1px solid var(--line);border-radius:8px;font-size:14px;color:var(--muted);font-weight:500}

/* plans */
.plans{grid-template-columns:repeat(auto-fit,minmax(220px,1fr));align-items:stretch}
.plan{display:flex;flex-direction:column;position:relative}
.plan.popular{border-color:rgba(124,58,237,.6);box-shadow:var(--shadow)}
.plan .pop-badge{position:absolute;top:-12px;left:50%;transform:translateX(-50%);background:linear-gradient(135deg,var(--primary),var(--primary2));padding:5px 14px;border-radius:99px;font-size:11px;font-weight:600;letter-spacing:.05em;text-transform:uppercase}
.plan h3{font-size:18px;margin-bottom:6px}
.plan .price{font-size:42px;font-weight:800;margin:14px 0 4px;letter-spacing:-.02em}
.plan .price small{font-size:14px;color:var(--muted);font-weight:500}
.plan .price-period{color:var(--muted);font-size:13px;margin-bottom:18px}
.plan ul{list-style:none;padding:0;margin:0 0 24px;flex:1}
.plan ul li{padding:6px 0;color:var(--muted);font-size:14px;display:flex;gap:8px;align-items:start}
.plan ul li::before{content:"✓";color:#22c55e;font-weight:700;flex-shrink:0}
.plan .btn-primary,.plan .btn-ghost{width:100%;text-align:center;display:block}
.spinner{width:32px;height:32px;border:3px solid var(--line);border-top-color:var(--primary);border-radius:50%;animation:spin 1s linear infinite;margin:30px auto}
@keyframes spin{to{transform:rotate(360deg)}}
.plan.loading{justify-content:center;min-height:280px}

/* faq */
.faq{max-width:780px;margin:0 auto}
.faq details{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px 22px;margin-bottom:10px;cursor:pointer}
.faq summary{font-weight:600;font-size:16px;list-style:none;outline:none}
.faq summary::after{content:"+";float:right;color:var(--muted);font-weight:300;font-size:20px;line-height:1}
.faq details[open] summary::after{content:"−"}
.faq details p{color:var(--muted);margin:12px 0 0;font-size:15px;line-height:1.6}
.faq a{color:var(--primary2);text-decoration:underline}

/* footer */
.footer{border-top:1px solid var(--line);padding:60px 28px 30px;margin-top:40px}
.footer-grid{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px}
.footer h4{margin:0 0 14px;font-size:14px;color:var(--muted);text-transform:uppercase;letter-spacing:.05em}
.footer a{display:block;color:var(--fg);font-size:14px;padding:4px 0;opacity:.85;transition:opacity .15s}
.footer a:hover{opacity:1;color:var(--primary2)}
.footer .small{font-size:13px}
.footer-bottom{text-align:center;color:var(--muted);font-size:13px;padding-top:30px;border-top:1px solid var(--line);margin-top:40px;max-width:1200px;margin-left:auto;margin-right:auto}

.fine{margin-top:24px;font-size:13px;text-align:center}

/* responsive */
@media (max-width:760px){
  .nav-links{display:none}
  .nav{gap:10px;padding:10px 16px}
  .nav-right .btn-ghost{display:none}
  .hero{padding:60px 20px}
  .section{padding:60px 20px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
  .hero-trust{gap:24px}
  .hero-trust b{font-size:18px}
}

/* auth + account pages */
.auth-page,.account-page{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:40px 20px}
.auth-card{max-width:420px;width:100%;background:var(--card2);border:1px solid var(--line);border-radius:var(--radius);padding:40px}
.auth-card h1{font-size:28px;margin:0 0 8px}
.auth-card p{color:var(--muted);margin:0 0 28px;font-size:15px}
.auth-card .field{margin-bottom:16px}
.auth-card label{display:block;font-size:13px;color:var(--muted);margin-bottom:6px;font-weight:500}
.auth-card input{width:100%;background:var(--bg);border:1px solid var(--line);color:var(--fg);padding:12px 14px;border-radius:10px;font-size:15px;outline:none;transition:border-color .15s}
.auth-card input:focus{border-color:var(--primary)}
.auth-card .btn-primary{width:100%;padding:14px}
.auth-msg{margin-top:16px;padding:12px;background:rgba(34,197,94,.1);border:1px solid rgba(34,197,94,.3);color:#86efac;border-radius:10px;font-size:14px;display:none}
.auth-msg.show{display:block}
.auth-msg.err{background:rgba(239,68,68,.1);border-color:rgba(239,68,68,.3);color:#fca5a5}

/* account dashboard */
.dash{max-width:1100px;margin:0 auto;padding:40px 28px}
.dash-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:30px}
.dash-head h1{margin:0;font-size:24px}
.dash-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px;margin-bottom:30px}
.stat{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px}
.stat .label{color:var(--muted);font-size:13px;text-transform:uppercase;letter-spacing:.05em;margin-bottom:8px}
.stat .value{font-size:28px;font-weight:700;letter-spacing:-.02em}
.stat .sub{color:var(--muted);font-size:13px;margin-top:4px}
.dash-section{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px;margin-bottom:18px}
.dash-section h3{margin:0 0 16px;font-size:17px}
table.usage{width:100%;border-collapse:collapse;font-size:14px}
table.usage th{text-align:left;padding:8px 12px;color:var(--muted);font-weight:500;font-size:12px;text-transform:uppercase;letter-spacing:.05em;border-bottom:1px solid var(--line)}
table.usage td{padding:10px 12px;border-bottom:1px solid var(--line)}
.api-key{background:var(--bg);padding:14px;border-radius:8px;font-family:"SF Mono",Menlo,Consolas,monospace;font-size:13px;word-break:break-all;border:1px solid var(--line);margin-bottom:12px}