/* Theme */
:root {
  --bg: #0b0f1a;
  --panel: #11182a;
  --text: #e6eaf2;
  --muted: #9aa3b2;
  --brand: #4f7cff;
  --brand-600: #3d6af0;
  --accent: #22d3ee;
  --success: #10b981;
  --danger: #ef4444;
  --ring: #4f7cff33;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  color: var(--text);
  background: radial-gradient(1200px 600px at 10% -10%, #183055 0%, rgba(17, 24, 42, 0) 60%), var(--bg);
  line-height: 1.6;
}

img { display: inline-block; }
a { color: inherit; text-decoration: none; }

.container { width: 100%; max-width: 1120px; margin: 0 auto; padding: 0 20px; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: saturate(180%) blur(10px);
  background: rgba(11, 15, 26, 0.6);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; letter-spacing: 0.2px; }
.nav-links { display: flex; gap: 20px; }
.nav-links a { padding: 10px 12px; border-radius: 8px; color: var(--muted); }
.nav-links a:hover { color: var(--text); background: rgba(255,255,255,0.05); }

.menu-toggle { display: none; background: transparent; border: 0; padding: 8px; cursor: pointer; border-radius: 8px; }
.menu-toggle:focus { outline: 2px solid var(--ring); }
.menu-bar { display: block; width: 22px; height: 2px; background: var(--text); margin: 4px 0; border-radius: 2px; }

/* Hero */
.hero { padding: 96px 0 72px; background: radial-gradient(1000px 500px at 90% -20%, #183055 0%, rgba(17, 24, 42, 0) 60%); }
.hero h1 { font-size: 40px; line-height: 1.1; margin: 0 0 16px; }
.hero p { font-size: 18px; color: var(--muted); margin: 0 0 28px; }
.hero-cta { display: flex; gap: 12px; flex-wrap: wrap; }

/* Sections */
.section { padding: 72px 0; }
.section.alt { background: linear-gradient(0deg, rgba(255,255,255,0.03), rgba(255,255,255,0.03)); }
.grid { display: grid; gap: 24px; }
.grid.two { grid-template-columns: repeat(2, minmax(0,1fr)); }
.grid.three { grid-template-columns: repeat(3, minmax(0,1fr)); }

.card { background: var(--panel); border: 1px solid rgba(255,255,255,0.06); border-radius: 14px; padding: 20px; box-shadow: var(--shadow); }
.card.highlight { border-color: rgba(79,124,255,0.5); box-shadow: 0 10px 30px rgba(79,124,255,0.15); }

.checklist { list-style: none; padding: 0; margin: 16px 0 0; }
.checklist li { padding-left: 26px; position: relative; margin: 8px 0; }
.checklist li::before { content: ""; position: absolute; left: 0; top: 8px; width: 16px; height: 16px; border-radius: 50%; background: conic-gradient(var(--success), var(--accent)); box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.2); }

/* Buttons */
.button { display: inline-flex; align-items: center; justify-content: center; height: 44px; padding: 0 16px; border-radius: 10px; border: 1px solid rgba(255,255,255,0.08); cursor: pointer; transition: transform .05s ease, background .2s ease; }
.button:active { transform: translateY(1px); }
.button.primary { background: linear-gradient(180deg, var(--brand), var(--brand-600)); color: #fff; border-color: transparent; }
.button.ghost { background: transparent; color: var(--text); }
.button.full { width: 100%; }

/* Form */
.form .field { margin-bottom: 14px; }
.form label { display: block; font-weight: 600; margin-bottom: 6px; }
.form input, .form textarea { width: 100%; padding: 12px 12px; border-radius: 10px; border: 1px solid rgba(255,255,255,0.12); background: #0e1424; color: var(--text); outline: none; }
.form input:focus, .form textarea:focus { border-color: var(--brand); box-shadow: 0 0 0 4px var(--ring); }
.form .error { color: var(--danger); font-size: 13px; min-height: 18px; margin: 6px 0 0; }
#form-status { margin-top: 10px; font-size: 14px; color: var(--muted); }

/* Footer */
.site-footer { padding: 32px 0; border-top: 1px solid rgba(255,255,255,0.06); background: rgba(11, 15, 26, 0.6); }
.site-footer p { margin: 0; color: var(--muted); }

/* Responsive */
@media (max-width: 900px) {
  .grid.two { grid-template-columns: 1fr; }
  .grid.three { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .nav-links { position: fixed; right: 16px; left: 16px; top: 72px; display: none; flex-direction: column; background: var(--panel); border: 1px solid rgba(255,255,255,0.06); border-radius: 14px; padding: 8px; box-shadow: var(--shadow); }
  .nav-links.show { display: flex; }
  .menu-toggle { display: inline-block; }
}