/* Base */
:root {
  --bg: #0b1220;
  --panel: rgba(255, 255, 255, 0.06);
  --border: rgba(255, 255, 255, 0.14);
  --text: #e5e7eb;
  --muted: #9aa3b2;
  --primary: #60a5fa;
  --primary-700: #3b82f6;
  --accent: #a78bfa;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, 'Apple Color Emoji', 'Segoe UI Emoji';
  color: var(--text);
  background: radial-gradient(1200px 600px at 80% -100px, #1f2a44 0%, transparent 60%),
              radial-gradient(900px 500px at -20% -120px, #1b2440 0%, transparent 55%),
              var(--bg);
}

/* Layout */
.container { max-width: 1080px; margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; position: relative; }
.section.alt { background: linear-gradient(180deg, rgba(255,255,255,0.04), rgba(255,255,255,0.02)); }
.section-title { font-size: 28px; font-weight: 800; letter-spacing: 0.2px; }
.section-desc { color: var(--muted); margin-top: 8px; }

.grid { display: grid; gap: 20px; }
.features-grid { grid-template-columns: repeat(3, 1fr); margin-top: 28px; }
.steps-grid { grid-template-columns: repeat(4, 1fr); margin-top: 20px; }
.exchanges-grid { grid-template-columns: repeat(6, 1fr); margin-top: 20px; }

/* Header */
.site-header { position: sticky; top: 0; z-index: 20; backdrop-filter: saturate(140%) blur(10px); background: rgba(11, 18, 32, 0.6); border-bottom: 1px solid var(--border); }
.nav { display: flex; align-items: center; justify-content: space-between; height: 64px; max-width: 1080px; margin: 0 auto; padding: 0 24px; }
.brand { color: #fff; font-weight: 800; letter-spacing: 0.4px; text-decoration: none; font-size: 18px; }
.nav-toggle { display: none; background: transparent; border: 1px solid var(--border); color: var(--text); border-radius: 8px; padding: 8px 10px; }
.nav-links { list-style: none; display: flex; gap: 16px; margin: 0; padding: 0; }
.nav-links a { color: var(--text); text-decoration: none; padding: 8px 10px; border-radius: 8px; }
.nav-links a:hover { background: var(--panel); }

/* Hero */
.hero { padding: 120px 0 80px; overflow: hidden; }
.headline { font-size: 40px; line-height: 1.1; margin: 0 0 16px; }
.subhead { color: var(--muted); font-size: 16px; }
.cta { display: flex; gap: 12px; margin-top: 22px; }
.bg-blur { position: absolute; inset: -20% -10% auto; height: 340px; background: radial-gradient(600px 280px at 30% 30%, rgba(96,165,250,0.4), transparent 70%), radial-gradient(600px 280px at 65% 30%, rgba(167,139,250,0.4), transparent 70%); filter: blur(60px); opacity: 0.7; pointer-events: none; }
.support { display: flex; align-items: center; gap: 10px; margin-top: 28px; color: var(--muted); }
.exchanges { display: flex; gap: 8px; flex-wrap: wrap; }
.badge { border: 1px dashed var(--border); color: var(--text); padding: 6px 10px; border-radius: 999px; font-size: 12px; background: var(--panel); }

/* Cards */
.card {
  background: linear-gradient(180deg, rgba(255,255,255,0.06), rgba(255,255,255,0.04));
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 18px 18px;
}
.card h3 { margin: 0 0 10px; font-size: 18px; }
.card p { margin: 0; color: var(--muted); }

/* Steps */
.step-index { font-weight: 700; color: var(--accent); font-size: 14px; }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; text-decoration: none; border: 1px solid var(--border); border-radius: 12px; padding: 10px 14px; color: var(--text); transition: transform 120ms ease, background 120ms ease; }
.btn:hover { transform: translateY(-1px); }
.btn-sm { padding: 8px 12px; font-size: 14px; }
.btn-primary { background: linear-gradient(180deg, var(--primary), var(--primary-700)); border-color: transparent; color: #0b1220; font-weight: 700; }
.btn-ghost { background: var(--panel); }

/* About */
.about { display: grid; gap: 12px; }
.bullets { margin: 4px 0 0; padding-left: 18px; color: var(--text); }
.bullets li { margin: 6px 0; }
.note { color: var(--muted); font-size: 13px; border-left: 3px solid var(--accent); padding-left: 12px; }

/* Download */
.download { text-align: center; }
.download .muted { display: block; margin-top: 12px; color: var(--muted); }
.center { justify-content: center; }

/* Form */
.form { margin-top: 12px; }
.form-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.form-group { display: grid; gap: 8px; }
.form-group.span-2 { grid-column: span 2; }
label { font-size: 13px; color: var(--text); }
.input, .textarea, .select { width: 100%; background: rgba(255,255,255,0.04); border: 1px solid var(--border); border-radius: 12px; color: var(--text); padding: 10px 12px; outline: none; }
.input::placeholder, .textarea::placeholder { color: var(--muted); }
.textarea { resize: vertical; }
.checkbox-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.checkbox-grid label { display: flex; align-items: center; gap: 8px; padding: 8px 10px; border-radius: 12px; background: var(--panel); border: 1px solid var(--border); }
.checkbox-grid input { accent-color: var(--primary-700); }
.submit-status { margin-left: 8px; }

/* Footer */
.site-footer { border-top: 1px solid var(--border); background: rgba(255,255,255,0.02); padding: 40px 0; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr; gap: 20px; }
.footer-links { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.footer-links a { color: var(--muted); text-decoration: none; }
.brand { font-weight: 800; }
.copyright { margin-top: 18px; color: var(--muted); font-size: 12px; text-align: center; }

/* Animations */
.fade-in { opacity: 0; transform: translateY(8px); transition: opacity 500ms ease, transform 500ms ease; }
.in-view { opacity: 1 !important; transform: none !important; }

/* Responsive */
@media (max-width: 960px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
  .exchanges-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 720px) {
  .headline { font-size: 32px; }
  .nav-toggle { display: inline-flex; }
  .nav-links { position: absolute; top: 64px; right: 0; left: 0; background: rgba(11, 18, 32, 0.9); border-bottom: 1px solid var(--border); padding: 12px 24px; display: none; flex-direction: column; gap: 8px; }
  .nav-links.open { display: flex; }
  .footer-grid { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .checkbox-grid { grid-template-columns: repeat(2, 1fr); }
}