:root {
  --bg: #0b1020;
  --bg-soft: #121a33;
  --card: #151d38;
  --line: #26315a;
  --text: #eef1fb;
  --muted: #9aa6cc;
  --accent: #6d5efc;
  --accent-2: #22d3ee;
  --ok: #34d399;
  --danger: #f87171;
  --radius: 14px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: radial-gradient(1200px 600px at 80% -10%, #1a2350 0%, var(--bg) 60%) no-repeat, var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
.container { max-width: 1080px; margin: 0 auto; padding: 0 20px; }

/* header */
header.site {
  position: sticky; top: 0; z-index: 10;
  backdrop-filter: saturate(140%) blur(10px);
  background: rgba(11,16,32,0.72);
  border-bottom: 1px solid var(--line);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; letter-spacing: 0.2px; }
.brand .mark {
  width: 28px; height: 28px; border-radius: 8px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  display: inline-block;
}
.nav-links { display: flex; align-items: center; gap: 22px; }
.nav-links a { color: var(--muted); font-size: 15px; }
.nav-links a:hover { color: var(--text); }
.btn {
  display: inline-block; cursor: pointer; border: 0; font: inherit; font-weight: 600;
  padding: 10px 18px; border-radius: 10px; color: #fff;
  background: linear-gradient(135deg, var(--accent), #8b7bff);
  transition: transform .06s ease, filter .15s ease;
}
.btn:hover { filter: brightness(1.08); }
.btn:active { transform: translateY(1px); }
.btn.ghost { background: transparent; border: 1px solid var(--line); color: var(--text); }
.btn.block { display: block; width: 100%; text-align: center; }

/* hero */
.hero { padding: 84px 0 40px; }
.eyebrow {
  display: inline-block; font-size: 13px; font-weight: 600; letter-spacing: 1px;
  text-transform: uppercase; color: var(--accent-2);
  border: 1px solid var(--line); border-radius: 999px; padding: 6px 14px; margin-bottom: 22px;
}
.hero h1 { font-size: clamp(34px, 5vw, 56px); line-height: 1.05; margin: 0 0 18px; font-weight: 800; }
.hero h1 .grad {
  background: linear-gradient(120deg, var(--accent-2), var(--accent));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero p.lead { font-size: 19px; color: var(--muted); max-width: 620px; margin: 0 0 28px; }
.hero .cta { display: flex; gap: 14px; flex-wrap: wrap; }

.stats { display: flex; gap: 40px; margin-top: 56px; flex-wrap: wrap; }
.stat .n { font-size: 30px; font-weight: 800; }
.stat .l { color: var(--muted); font-size: 14px; }

/* sections */
section { padding: 56px 0; }
.section-head { max-width: 640px; margin: 0 0 34px; }
.section-head h2 { font-size: clamp(26px, 3.5vw, 36px); margin: 0 0 12px; font-weight: 800; }
.section-head p { color: var(--muted); margin: 0; font-size: 17px; }

.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 24px; transition: border-color .15s ease, transform .15s ease;
}
.card:hover { border-color: var(--accent); transform: translateY(-2px); }
.card h3 { margin: 0 0 8px; font-size: 19px; }
.card .price { font-size: 15px; color: var(--accent-2); font-weight: 700; margin-bottom: 10px; }
.card p { color: var(--muted); margin: 0 0 16px; font-size: 15px; }
.card .meta { color: var(--muted); font-size: 13px; border-top: 1px solid var(--line); padding-top: 12px; }

.badge { display: inline-block; font-size: 12px; color: var(--muted); border: 1px solid var(--line); border-radius: 6px; padding: 2px 8px; margin-right: 6px; }

/* mentors */
.mentors { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.mentor { text-align: center; }
.avatar {
  width: 72px; height: 72px; border-radius: 50%; margin: 0 auto 12px;
  background: linear-gradient(135deg, #2a3566, #46508c);
  display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 22px;
  border: 1px solid var(--line);
}
.mentor .name { font-weight: 600; }
.mentor .role { color: var(--muted); font-size: 13px; }

/* forms */
.panel {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 28px;
}
.split { display: grid; grid-template-columns: 1.1fr 1fr; gap: 40px; align-items: center; }
label { display: block; font-size: 14px; color: var(--muted); margin: 14px 0 6px; }
input {
  width: 100%; padding: 12px 14px; border-radius: 10px;
  border: 1px solid var(--line); background: var(--bg-soft); color: var(--text);
  font: inherit;
}
input:focus { outline: none; border-color: var(--accent); }
.form-note { font-size: 13px; color: var(--muted); margin-top: 14px; }
.msg { margin-top: 14px; font-size: 14px; min-height: 20px; }
.msg.ok { color: var(--ok); }
.msg.err { color: var(--danger); }

/* auth page */
.auth-wrap { min-height: calc(100vh - 64px); display: flex; align-items: center; justify-content: center; padding: 40px 20px; }
.auth-card { width: 100%; max-width: 400px; }
.auth-card h1 { font-size: 24px; margin: 0 0 6px; }
.auth-card .sub { color: var(--muted); margin: 0 0 20px; font-size: 15px; }
.auth-alt { text-align: center; color: var(--muted); font-size: 14px; margin-top: 18px; }

/* footer */
footer.site { border-top: 1px solid var(--line); padding: 40px 0; color: var(--muted); font-size: 14px; }
.footer-row { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 16px; }

/* misc pages */
.prose { max-width: 680px; }
.prose h1 { font-size: 32px; }
.prose p { color: var(--muted); }
.center { text-align: center; }

@media (max-width: 820px) {
  .grid { grid-template-columns: 1fr; }
  .mentors { grid-template-columns: repeat(2, 1fr); }
  .split { grid-template-columns: 1fr; }
  .nav-links .hide-sm { display: none; }
}