:root {
  --bg: #0b0d12;
  --bg2: #0f131c;
  --card: #141824;
  --line: #252b3a;
  --text: #e8ecf4;
  --muted: #8b93a7;
  --muted2: #5c6478;
  --accent: #6c5ce7;
  --accent2: #a29bfe;
  --green: #2ed573;
  --danger: #ff6b6b;
  --radius: 16px;
  --maxw: 1080px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background:
    radial-gradient(1200px 600px at 8% -10%, #1a1f35 0%, var(--bg) 55%),
    radial-gradient(900px 500px at 100% 0%, #1b1630 0%, transparent 60%),
    var(--bg);
  color: var(--text);
  line-height: 1.5;
  display: flex;
  flex-direction: column;
}

a { color: var(--accent2); text-decoration: none; }
a:hover { text-decoration: underline; }

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 22px; }

.muted { color: var(--muted); }

/* ── header / nav ── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(10px);
  background: rgba(11, 13, 18, 0.72);
  border-bottom: 1px solid var(--line);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--text); font-weight: 600; }
.brand:hover { text-decoration: none; }
.brand-mark {
  width: 36px; height: 36px;
  display: grid; place-items: center;
  border-radius: 10px;
  font-size: 0.78rem; font-weight: 700; letter-spacing: 0.5px;
  color: #fff;
  background: linear-gradient(135deg, var(--accent), #4834d4);
  box-shadow: 0 8px 24px rgba(108, 92, 231, 0.4);
}
.brand-name { font-size: 1.02rem; }
.nav-links { display: flex; align-items: center; gap: 22px; }
.nav-links a { color: var(--muted); font-size: 0.94rem; }
.nav-links a:hover { color: var(--text); text-decoration: none; }
.nav-toggle { display: none; background: none; border: 0; color: var(--text); font-size: 1.4rem; cursor: pointer; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  border: 0; border-radius: 12px;
  padding: 11px 18px; font-size: 0.95rem; font-weight: 600;
  color: #fff; cursor: pointer;
  background: linear-gradient(135deg, var(--accent), #4834d4);
  box-shadow: 0 10px 26px rgba(108, 92, 231, 0.32);
  transition: transform 0.12s, opacity 0.12s;
}
.btn:hover { transform: translateY(-1px); text-decoration: none; }
.btn:active { transform: translateY(0); opacity: 0.92; }
.btn-ghost {
  background: transparent; color: var(--accent2);
  border: 1px solid var(--line); box-shadow: none;
  padding: 8px 16px;
}
.btn-ghost:hover { border-color: var(--accent2); color: var(--text); }

/* ── layout ── */
main { flex: 1 0 auto; }
.section { padding: 56px 0; }
.section-sm { padding: 36px 0; }

.badge {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 5px 12px; border-radius: 999px;
  background: rgba(108, 92, 231, 0.14); color: var(--accent2);
  font-size: 0.74rem; margin-bottom: 16px;
}
.dot { width: 7px; height: 7px; border-radius: 50%; background: var(--green); box-shadow: 0 0 8px rgba(46,213,115,0.8); }

.hero h1 { font-size: clamp(1.8rem, 4vw, 2.9rem); line-height: 1.15; margin: 0 0 16px; font-weight: 700; }
.hero p.lead { font-size: 1.08rem; color: var(--muted); max-width: 620px; margin: 0 0 26px; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }

h2 { font-size: 1.5rem; margin: 0 0 6px; font-weight: 600; }
.section-lead { color: var(--muted); margin: 0 0 28px; }

.grid { display: grid; gap: 18px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: rgba(20, 24, 36, 0.9);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
}
.card .thumb {
  height: 132px; border-radius: 12px; margin-bottom: 16px;
  background: linear-gradient(135deg, #232a44, #15182a);
  display: grid; place-items: center; color: var(--muted2); font-size: 0.8rem;
  border: 1px solid var(--line);
}
.card h3 { margin: 0 0 6px; font-size: 1.06rem; font-weight: 600; }
.card .meta { font-size: 0.82rem; color: var(--muted2); display: flex; gap: 12px; flex-wrap: wrap; }
.lock { color: var(--accent2); }

.prose { max-width: 760px; }
.prose h1 { font-size: 1.8rem; margin: 0 0 8px; }
.prose h2 { font-size: 1.2rem; margin: 28px 0 8px; }
.prose p, .prose li { color: #c4cad8; }
.prose ul { padding-left: 20px; }
.prose .updated { color: var(--muted2); font-size: 0.85rem; margin-bottom: 24px; }

/* ── auth card ── */
.auth-wrap { min-height: calc(100vh - 64px - 220px); display: grid; place-items: center; padding: 40px 0; }
.auth { width: 100%; max-width: 420px; }
.auth .brand-block { text-align: center; margin-bottom: 24px; }
.auth .logo {
  width: 56px; height: 56px; margin: 0 auto 14px; border-radius: 16px;
  background: linear-gradient(135deg, var(--accent), #4834d4);
  display: grid; place-items: center; font-weight: 700;
  box-shadow: 0 12px 40px rgba(108, 92, 231, 0.35);
}
.auth h1 { font-size: 1.3rem; margin: 0 0 6px; }
.auth .sub { color: var(--muted); font-size: 0.92rem; margin: 0; }
label { display: block; font-size: 0.82rem; color: var(--muted); margin: 0 0 6px 2px; }
.field { margin-bottom: 16px; }
input[type=email], input[type=password], input[type=text] {
  width: 100%; border: 1px solid var(--line); background: var(--bg2);
  color: var(--text); border-radius: 12px; padding: 12px 14px; font-size: 0.95rem;
  outline: none; transition: border-color 0.15s, box-shadow 0.15s;
}
input:focus { border-color: var(--accent2); box-shadow: 0 0 0 3px rgba(108, 92, 231, 0.2); }
.row { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin: 4px 0 18px; font-size: 0.82rem; color: var(--muted); }
.row label { display: inline-flex; align-items: center; gap: 8px; margin: 0; cursor: pointer; }
.msg { display: none; margin-top: 14px; padding: 10px 12px; border-radius: 10px; background: rgba(255,107,107,0.12); border: 1px solid rgba(255,107,107,0.35); color: #ffb4b4; font-size: 0.86rem; }
.msg.show { display: block; }

/* ── footer ── */
.site-footer { flex-shrink: 0; border-top: 1px solid var(--line); padding: 36px 0 28px; margin-top: 40px; background: rgba(9, 11, 16, 0.6); }
.foot-grid { display: flex; align-items: flex-start; justify-content: space-between; gap: 32px; flex-wrap: wrap; }
.foot-grid .brand { margin-bottom: 8px; }
.foot-links { display: flex; flex-direction: column; gap: 8px; }
.foot-links a { color: var(--muted); font-size: 0.9rem; }
.foot-bottom { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-top: 24px; padding-top: 18px; border-top: 1px solid var(--line); font-size: 0.8rem; }

/* ── 404 ── */
.center-block { min-height: calc(100vh - 64px - 220px); display: grid; place-items: center; text-align: center; padding: 48px 0; }
.center-block .code { font-size: 4.5rem; font-weight: 700; background: linear-gradient(135deg, var(--accent2), var(--accent)); -webkit-background-clip: text; background-clip: text; color: transparent; }

@media (max-width: 760px) {
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .nav-links { position: absolute; top: 64px; left: 0; right: 0; flex-direction: column; align-items: stretch; gap: 0; background: var(--bg); border-bottom: 1px solid var(--line); padding: 8px 22px 16px; display: none; }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 12px 0; }
  .nav-toggle { display: block; }
  .foot-grid { flex-direction: column; gap: 20px; }
}