:root {
  --bg: #0b0d12;
  --bg-soft: #11141b;
  --fg: #e6e8ee;
  --fg-soft: #9aa3b2;
  --accent: #7c3aed;
  --accent-2: #2563eb;
  --border: #1f2430;
  --code-bg: #181c25;
  --max: 880px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, system-ui, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.65;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
}

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

.lang-bar {
  display: flex;
  justify-content: flex-end;
  padding: 12px 20px 0;
  max-width: 1200px;
  margin: 0 auto;
}

.lang-bar select {
  background: var(--bg-soft);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px 10px;
  font-family: inherit;
  font-size: 0.9rem;
  cursor: pointer;
}

.lang-bar select:hover {
  border-color: var(--accent);
}

header.hero {
  background: radial-gradient(ellipse at top, #1e1b3a 0%, var(--bg) 60%);
  padding: 40px 24px 60px;
  text-align: center;
  border-bottom: 1px solid var(--border);
}

header.hero .logo {
  width: 96px;
  height: 96px;
  margin: 0 auto 24px;
  display: block;
}

header.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4rem);
  margin: 0 0 12px;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, #fff 0%, #b0b5d4 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

header.hero .tagline {
  font-size: 1.2rem;
  color: var(--fg-soft);
  margin: 0 0 8px;
  max-width: 560px;
  margin-inline: auto;
}

header.hero .sub {
  color: var(--fg-soft);
  font-size: 0.95rem;
  margin-top: 24px;
}

.cta {
  display: inline-flex;
  gap: 12px;
  margin-top: 28px;
  flex-wrap: wrap;
  justify-content: center;
}

.btn {
  display: inline-block;
  padding: 12px 22px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: transform 0.1s, background 0.2s;
  border: 1px solid var(--border);
  background: var(--bg-soft);
  color: var(--fg);
}

.btn.primary {
  background: linear-gradient(135deg, var(--accent-2), var(--accent));
  border: none;
  color: white;
}

.btn:hover { transform: translateY(-1px); text-decoration: none; }

main {
  max-width: var(--max);
  margin: 0 auto;
  padding: 60px 24px;
}

section {
  margin-bottom: 80px;
}

section h2 {
  font-size: 1.8rem;
  margin: 0 0 20px;
  letter-spacing: -0.01em;
}

section p { color: var(--fg-soft); }

.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-top: 20px;
}

.card {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
}

.card h3 {
  margin: 0 0 8px;
  font-size: 1.1rem;
  color: var(--fg);
}

.card p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--fg-soft);
}

.example {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  margin: 20px 0;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 0.95rem;
  white-space: pre-wrap;
  line-height: 1.5;
}

.example .tapi { color: #b794f4; font-weight: 600; }
.example .gloss { color: var(--fg-soft); font-size: 0.85em; }
.example .trans { color: #fde68a; font-style: italic; }

table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: 0.95rem;
}

th, td {
  text-align: left;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
}

th {
  color: var(--fg);
  font-weight: 600;
  background: var(--bg-soft);
}

td { color: var(--fg-soft); }
td code, td:first-child { color: var(--fg); font-family: ui-monospace, Menlo, monospace; }

.tool {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  margin-top: 20px;
}

.tool label {
  display: block;
  margin-bottom: 8px;
  font-weight: 600;
  color: var(--fg);
}

.tool input {
  width: 100%;
  padding: 10px 14px;
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--fg);
  font-family: inherit;
  font-size: 1rem;
}

.tool .result {
  margin-top: 16px;
  padding: 16px;
  background: var(--code-bg);
  border-radius: 8px;
  font-family: ui-monospace, Menlo, monospace;
  font-size: 0.9rem;
  white-space: pre-wrap;
  min-height: 1.5em;
  color: var(--fg-soft);
}

footer {
  text-align: center;
  padding: 40px 24px;
  border-top: 1px solid var(--border);
  color: var(--fg-soft);
  font-size: 0.9rem;
}

footer a { margin: 0 8px; }

@media (max-width: 600px) {
  header.hero { padding: 56px 20px 40px; }
  main { padding: 40px 20px; }
}