:root {
  --bg: #0c0f14;
  --surface: #141a24;
  --border: #243044;
  --text: #e8edf5;
  --muted: #8b98ab;
  --accent: #3ee8b5;
  --accent-dim: #1f6f58;
  --danger: #ff6b6b;
  --radius: 12px;
  --font: "DM Sans", system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  background: radial-gradient(1200px 600px at 10% -10%, #1a2840 0%, transparent 55%),
    radial-gradient(900px 500px at 90% 0%, #12302a 0%, transparent 50%),
    var(--bg);
  color: var(--text);
  line-height: 1.55;
}

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

.wrap { width: min(1040px, 92vw); margin: 0 auto; padding: 0 1rem; }

.site-header {
  border-bottom: 1px solid var(--border);
  background: rgba(12, 15, 20, 0.75);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 10;
}
.header-inner {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem 1rem;
  justify-content: space-between;
  padding: 1rem 0;
}
.logo {
  font-weight: 700;
  letter-spacing: 0.06em;
  font-family: var(--mono);
  color: var(--text);
  text-decoration: none;
}
.nav a {
  margin-left: 1.25rem;
  color: var(--muted);
  font-weight: 600;
}
.nav a:hover { color: var(--text); }

.lang-switcher {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.2rem;
  padding-left: 0.75rem;
  border-left: 1px solid var(--border);
}
.lang-flag {
  font-size: 1.35rem;
  line-height: 1;
  text-decoration: none;
  opacity: 0.75;
  padding: 0.15rem;
  border-radius: 6px;
}
.lang-flag:hover {
  opacity: 1;
  text-decoration: none;
  background: var(--surface);
}
.lang-flag-active {
  opacity: 1;
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.readme-wrap { padding: 1rem 0 3rem; max-width: 900px; margin: 0 auto; }
.readme-header { margin-bottom: 2rem; }
.markdown-body { color: var(--text); line-height: 1.65; }
.markdown-body h1, .markdown-body h2, .markdown-body h3 {
  margin-top: 1.75rem;
  margin-bottom: 0.75rem;
  font-weight: 700;
}
.markdown-body h1 { font-size: 1.75rem; border-bottom: 1px solid var(--border); padding-bottom: 0.35rem; }
.markdown-body h2 { font-size: 1.35rem; }
.markdown-body pre {
  background: #0a0d12;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 0.88rem;
}
.markdown-body code {
  font-family: var(--mono);
  font-size: 0.9em;
  background: #0a0d12;
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
}
.markdown-body pre code { background: none; padding: 0; }
.markdown-body a { word-break: break-word; }
.markdown-body ul, .markdown-body ol { padding-left: 1.5rem; }
.markdown-body table { border-collapse: collapse; width: 100%; margin: 1rem 0; font-size: 0.92rem; }
.markdown-body th, .markdown-body td { border: 1px solid var(--border); padding: 0.5rem 0.65rem; }
.markdown-body th { background: var(--surface); }

.nav-logout-form {
  display: inline;
  margin: 0;
  margin-left: 1.25rem;
}
.nav-link-btn {
  background: none;
  border: none;
  padding: 0;
  font: inherit;
  font-weight: 600;
  color: var(--muted);
  cursor: pointer;
}
.nav-link-btn:hover {
  color: var(--text);
  text-decoration: underline;
}

.inline-logout {
  margin-top: 1.5rem;
}

.hero { padding: 3rem 0 2rem; }
.eyebrow {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--accent);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.hero h1 {
  font-size: clamp(2rem, 4vw, 2.75rem);
  line-height: 1.15;
  margin: 0.5rem 0 1rem;
}
.lead {
  font-size: 1.15rem;
  color: var(--muted);
  max-width: 52ch;
}
.hero-actions { margin-top: 1.75rem; display: flex; flex-wrap: wrap; gap: 0.75rem; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 1.25rem;
  border-radius: 999px;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  font-family: inherit;
  font-size: 1rem;
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent), #2bc4ff);
  color: #041018;
  border-color: rgba(255,255,255,0.12);
}
.btn-primary:hover { filter: brightness(1.05); text-decoration: none; }
.btn-ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}
.btn-block { width: 100%; }

.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin: 2rem 0 3rem;
}
.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
}
.stat-wide { grid-column: 1 / -1; }
.stat-label { display: block; font-size: 0.85rem; color: var(--muted); }
.stat-value { font-size: 1.75rem; font-weight: 700; font-family: var(--mono); }
.stat-sub { font-size: 0.85rem; color: var(--muted); display: block; margin-top: 0.5rem; }

.progress {
  height: 10px;
  background: #0a0d12;
  border-radius: 999px;
  overflow: hidden;
  margin-top: 0.5rem;
  border: 1px solid var(--border);
}
.progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-dim), var(--accent));
}

.section { margin: 2.5rem 0; }
.section h2 { margin-top: 0; }
.prose { max-width: 70ch; color: var(--muted); white-space: pre-line; }
.prose.muted { margin-top: 1rem; }

.feature-list {
  list-style: none;
  padding: 0;
  margin: 1rem 0;
}
.feature-list li {
  padding: 0.65rem 0 0.65rem 1.5rem;
  position: relative;
  border-bottom: 1px solid var(--border);
}
.feature-list li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-family: var(--mono);
}

.cta-band {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 2rem;
  background: linear-gradient(135deg, rgba(62, 232, 181, 0.08), rgba(43, 196, 255, 0.06));
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.narrow { max-width: 440px; margin: 2rem auto; }
.form label { display: block; margin: 1rem 0 0.35rem; font-weight: 600; font-size: 0.9rem; }
.form input {
  width: 100%;
  padding: 0.65rem 0.75rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #0a0d12;
  color: var(--text);
  font-family: inherit;
}
.fine-print { font-size: 0.8rem; color: var(--muted); margin-top: 1.5rem; }

.ide-launch .password-box {
  margin: 1.25rem 0;
  padding: 1rem;
  background: #0a0d12;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.ide-launch .password-box code {
  display: block;
  font-family: var(--mono);
  font-size: 0.95rem;
  word-break: break-all;
  margin: 0.5rem 0 1rem;
  color: var(--accent);
}
.cta-row { margin-top: 1.5rem; }

.flashes { list-style: none; padding: 0; margin: 1rem 0; }
.flash {
  padding: 0.75rem 1rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface);
}
.flash-error { border-color: #6b2a2a; color: #ffb4b4; }
.flash-warning { border-color: #6b5a2a; color: #ffe4a8; }

.site-footer {
  border-top: 1px solid var(--border);
  margin-top: 4rem;
  padding: 2rem 0;
  color: var(--muted);
  font-size: 0.9rem;
}