/* ── t0lkim.dev — Shared Base Styles ─────────────────── */

:root {
  --bg: #0D1117;
  --surface: #161B22;
  --surface-hover: #1C2129;
  --border: #30363D;
  --border-subtle: #21262D;
  --text: #E6EDF3;
  --text-muted: #8B949E;
  --teal: #00C9A7;
  --teal-dim: rgba(0, 201, 167, 0.15);
  --teal-glow: rgba(0, 201, 167, 0.08);
  --blue: #58A6FF;
  --red: #F85149;
  --red-dim: rgba(248, 81, 73, 0.15);
  --green: #3FB950;
  --yellow: #D29922;
}

/* ── Reset ───────────────────────────────────────────── */
* { margin: 0; padding: 0; box-sizing: border-box; }

/* ── Base Typography ─────────────────────────────────── */
body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'Segoe UI', 'Noto Sans', system-ui, Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

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

code {
  background: rgba(0, 201, 167, 0.08);
  color: var(--teal);
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 0.85rem;
  font-family: 'SF Mono', Menlo, monospace;
}

/* ── Layout Utilities ────────────────────────────────── */
.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ── Divider ─────────────────────────────────────────── */
.divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border) 20%, var(--border) 80%, transparent);
  margin: 40px auto;
  max-width: 800px;
}

/* ── Section Labels ──────────────────────────────────── */
.section-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 16px;
}

/* ── Tag Pills ───────────────────────────────────────── */
.tag {
  font-size: 11px;
  padding: 3px 10px;
  border-radius: 6px;
  background: var(--teal-dim);
  color: var(--teal);
  border: 1px solid rgba(0, 201, 167, 0.2);
}

/* ── Home Button ─────────────────────────────────────── */
.home-btn {
  position: fixed;
  top: 20px;
  left: 20px;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--surface);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  transition: border-color 0.2s, background 0.2s;
  z-index: 100;
}

.home-btn:hover {
  border-color: var(--teal);
  background: var(--surface-hover, #1C2129);
  text-decoration: none;
}

.home-btn svg {
  fill: var(--text-muted);
  transition: fill 0.2s;
}

.home-btn:hover svg { fill: var(--teal); }

/* ── Scroll Fade-in ──────────────────────────────────── */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Footer ──────────────────────────────────────────── */
.footer {
  padding: 40px 0;
  text-align: center;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-bottom: 20px;
}

.footer-links a {
  color: var(--teal);
  text-decoration: none;
  font-size: 0.9rem;
  transition: opacity 0.2s;
}

.footer-links a:hover { opacity: 0.8; text-decoration: none; }

.footer-copy {
  font-size: 0.8rem;
  color: var(--text-muted);
}