/* ---- Reset & Base ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #fafafa;
  --surface: #ffffff;
  --text: #1a1a2e;
  --text-secondary: #555;
  --text-tertiary: #888;
  --accent: #5469d4;
  --accent-hover: #3d4fc4;
  --border: #eaeaea;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
  --max-width: 560px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16161a;
    --surface: #1e1e24;
    --text: #e0e0e0;
    --text-secondary: #a0a0a0;
    --text-tertiary: #666;
    --accent: #7b8ff5;
    --accent-hover: #99aaff;
    --border: #2a2a30;
  }
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font);
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  padding: 60px 24px 80px;
}

/* ---- Layout ---- */
.container {
  width: 100%;
  max-width: var(--max-width);
}

/* ---- Header ---- */
.header {
  margin-bottom: 36px;
}

.header h1 {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text);
  margin-bottom: 2px;
}

.header .tagline {
  font-size: 0.82rem;
  color: var(--text-tertiary);
  font-style: italic;
}

/* ---- Sections ---- */
.section {
  margin-bottom: 28px;
}

.section-title {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-tertiary);
  margin-bottom: 6px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border);
}

/* ---- Links ---- */
.link-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.link-list a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 10px;
  margin: 0 -10px;
  border-radius: 6px;
  color: var(--text);
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 450;
  transition: background 0.15s ease, color 0.15s ease;
}

.link-list a:hover {
  background: var(--surface);
  color: var(--accent);
}

.link-list .arrow {
  font-size: 0.75rem;
  color: var(--text-tertiary);
  opacity: 0;
  transform: translateX(-4px);
  transition: opacity 0.15s ease, transform 0.15s ease;
}

.link-list a:hover .arrow {
  opacity: 1;
  transform: translateX(0);
}

/* ---- Social row ---- */
.social-row {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 4px;
}

.social-row a {
  font-size: 0.82rem;
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.15s ease;
}

.social-row a:hover {
  color: var(--accent);
}

/* ---- Responsive ---- */
@media (max-width: 480px) {
  body { padding: 40px 20px 60px; }
  .header h1 { font-size: 1.3rem; }
  .header { margin-bottom: 28px; }
}