/* GPTExpress marketing site — dark theme, matches the chat app */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;600;700&display=swap');
:root{
  --bg:#212121; --panel:#2a2a2a; --panel-2:#1b1b1b; --border:#3a3a3a;
  --text:#ececec; --muted:#9aa3b2; --blue:#1c99fd; --blue-dark:#0a82d8; --white:#fff;
  --font-body:'Inter',-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --font-mono:'JetBrains Mono',ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:var(--font-body);
  background:var(--bg); color:var(--text); line-height:1.6; -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,.logo,.btn,.eyebrow,.subtitle,.nav-links a,.price-card .amt,.ps-label,.footer-col h4{font-family:var(--font-mono);}
a{color:var(--blue); text-decoration:none}
.container{max-width:1120px; margin:0 auto; padding:0 24px}
.btn{display:inline-flex; align-items:center; gap:8px; padding:12px 22px; border-radius:10px; font-weight:600; font-size:15px; cursor:pointer; border:1px solid transparent; transition:all .15s}
.btn-primary{background:var(--blue); color:#fff}
.btn-primary:hover{background:var(--blue-dark)}
.btn-accent{background:var(--blue); color:#fff}
.btn-accent:hover{background:var(--blue-dark)}
.btn-ghost{background:transparent; border-color:var(--border); color:var(--text)}
.btn-ghost:hover{border-color:var(--blue); color:var(--blue)}
.btn-lg{padding:15px 30px; font-size:16px}

/* Header */
.site-header{position:sticky; top:0; z-index:50; background:rgba(33,33,33,.85); backdrop-filter:blur(10px); border-bottom:1px solid var(--border)}
.nav{display:flex; align-items:center; justify-content:space-between; height:68px}
.logo{display:flex; align-items:center; gap:10px; font-weight:700; font-size:20px; color:var(--white)}
.logo img{width:32px; height:32px; border-radius:8px}
.nav-links{display:flex; align-items:center; gap:26px}
.nav-links a{color:var(--text); font-weight:500}
.nav-links a:hover{color:var(--blue)}
.nav-links .btn{color:#fff}

/* Hero */
.hero{padding:90px 0 76px; text-align:center; background:radial-gradient(ellipse 70% 60% at 50% 0%, rgba(28,153,253,.14), transparent 70%)}
.hero .eyebrow{display:inline-block; background:rgba(28,153,253,.14); color:var(--blue); font-weight:600; font-size:13px; padding:6px 14px; border-radius:20px; margin-bottom:22px}
.hero h1{font-size:clamp(34px,5vw,58px); line-height:1.08; font-weight:800; letter-spacing:-1px; margin-bottom:20px; color:var(--white)}
.hero h1 .grad{color:var(--blue)}
.hero p.lead{font-size:19px; color:var(--muted); max-width:620px; margin:0 auto 32px}
.hero-cta{display:flex; gap:14px; justify-content:center; flex-wrap:wrap}
.hero .note{margin-top:18px; font-size:13px; color:var(--muted)}

/* Sections */
.section{padding:76px 0}
.section.alt{background:var(--panel-2)}
.section-head{text-align:center; max-width:640px; margin:0 auto 48px}
.section-head h2{font-size:34px; font-weight:800; letter-spacing:-.5px; margin-bottom:14px; color:var(--white)}
.section-head p{color:var(--muted); font-size:17px}

/* Feature grid */
.grid{display:grid; gap:22px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.feature{background:var(--panel); border:1px solid var(--border); border-radius:16px; padding:28px}
.feature .ico{width:48px; height:48px; border-radius:12px; background:rgba(28,153,253,.12); display:flex; align-items:center; justify-content:center; margin-bottom:16px; color:var(--blue)}
.feature .ico svg{width:24px; height:24px}
.feature .ico.num{font-size:20px; font-weight:800}
.feature h3{font-size:18px; margin-bottom:8px; color:var(--white)}
.feature p{color:var(--muted); font-size:15px}

/* Pricing */
.price-grid{display:grid; grid-template-columns:repeat(auto-fit,minmax(190px,1fr)); gap:18px; max-width:980px; margin:0 auto}
.price-card{background:var(--panel); border:1px solid var(--border); border-radius:16px; padding:30px 22px; text-align:center; position:relative}
.price-card.popular{border-color:var(--blue); box-shadow:0 0 0 1px var(--blue), 0 10px 40px rgba(28,153,253,.18)}
.price-card .tag{position:absolute; top:-12px; left:50%; transform:translateX(-50%); background:var(--blue); color:#fff; font-size:11px; font-weight:700; padding:4px 12px; border-radius:20px; text-transform:uppercase}
.price-card .amt{font-size:40px; font-weight:800; color:var(--white)}
.price-card .cr{color:var(--muted); margin:6px 0 18px}

/* FAQ */
.faq{max-width:760px; margin:0 auto}
.faq details{background:var(--panel); border:1px solid var(--border); border-radius:12px; padding:18px 20px; margin-bottom:12px}
.faq summary{font-weight:600; cursor:pointer; list-style:none; color:var(--text)}
.faq summary::-webkit-details-marker{display:none}
.faq details[open] summary{color:var(--blue)}
.faq p{color:var(--muted); margin-top:10px}

/* CTA band */
.cta-band{background:var(--blue); color:#fff; border-radius:22px; padding:56px 32px; text-align:center; margin:0 24px}
.cta-band h2{font-size:32px; font-weight:800; margin-bottom:12px; color:#fff}
.cta-band p{opacity:.92; margin-bottom:26px; font-size:17px}
.cta-band .btn{background:#fff; color:var(--blue)}
.cta-band .btn:hover{background:#eef6ff}

/* Content pages */
.page{padding:64px 0; max-width:780px}
.page h1{font-size:40px; font-weight:800; letter-spacing:-.5px; margin-bottom:10px; color:var(--white)}
.page .updated{color:var(--muted); margin-bottom:32px}
.page h2{font-size:22px; margin:30px 0 12px; color:var(--white)}
.page p,.page li{color:#c8cfda; margin-bottom:12px}
.page strong{color:var(--text)}
.page ul{padding-left:22px}
.placeholder{background:rgba(28,153,253,.14); border:1px dashed var(--blue); color:var(--blue); padding:3px 8px; border-radius:6px; font-size:13px}

/* Forms */
.form-card{background:var(--panel); border:1px solid var(--border); border-radius:16px; padding:30px; max-width:560px; margin:0 auto}
.field{margin-bottom:18px}
.field label{display:block; font-weight:600; font-size:14px; margin-bottom:7px; color:var(--text)}
.field input,.field textarea{width:100%; padding:12px 14px; background:var(--bg); border:1px solid var(--border); border-radius:10px; font-size:15px; font-family:inherit; color:var(--text)}
.field input:focus,.field textarea:focus{outline:none; border-color:var(--blue)}
.field textarea{min-height:130px; resize:vertical}
.form-msg{margin-top:14px; font-weight:600; display:none}
.contact-list{list-style:none; padding:0; margin-top:18px}
.contact-list li{margin-bottom:10px; color:var(--muted)}
.contact-list b{color:var(--text)}

/* Footer */
.site-footer{background:var(--panel-2); color:var(--muted); padding:54px 0 0; border-top:1px solid var(--border)}
.footer-grid{display:grid; grid-template-columns:2fr 1fr 1fr 1fr; gap:32px; padding-bottom:40px}
.site-footer .logo{color:#fff; margin-bottom:12px}
.site-footer p.tag{color:var(--muted); font-size:14px; max-width:280px}
.footer-col h4{color:#fff; font-size:14px; margin-bottom:14px; text-transform:uppercase; letter-spacing:.5px}
.footer-col a{display:block; color:var(--muted); margin-bottom:10px; font-size:14px}
.footer-col a:hover{color:var(--blue)}
.footer-bottom{border-top:1px solid var(--border); padding:22px 0; text-align:center; color:var(--muted); font-size:13px}

@media (max-width:820px){
  .grid-3,.grid-2{grid-template-columns:1fr}
  .nav-links{display:none}
  .footer-grid{grid-template-columns:1fr 1fr}
  .hero{padding:64px 0 54px}
}