:root {
  --bg: #0f1115;
  --panel: #171a21;
  --line: #262b36;
  --text: #e6e8ee;
  --muted: #949cb0;
  --accent: #4f8cff;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f7f8fa;
    --panel: #ffffff;
    --line: #e3e6ec;
    --text: #1a1d24;
    --muted: #666e80;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.6 -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo",
        "Pretendard", "Noto Sans KR", sans-serif;
}

.topbar {
  display: flex;
  align-items: center;
  gap: 28px;
  padding: 0 24px;
  height: 56px;
  border-bottom: 1px solid var(--line);
  background: var(--panel);
  position: sticky;
  top: 0;
}

.brand { font-weight: 700; text-decoration: none; color: var(--text); letter-spacing: -.02em; }

.topbar nav { display: flex; gap: 20px; }

.topbar nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 14px;
  padding: 4px 0;
  border-bottom: 2px solid transparent;
}

.topbar nav a:hover { color: var(--text); }
.topbar nav a.active { color: var(--text); border-bottom-color: var(--accent); }

main { max-width: 960px; margin: 0 auto; padding: 48px 24px 80px; }

.hero h1 { font-size: 32px; margin: 0 0 8px; letter-spacing: -.03em; }
.hero p { margin: 0 0 4px; color: var(--muted); }
.hero .note { font-size: 13px; margin-top: 12px; }

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-top: 36px;
}

.card {
  display: block;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel);
  text-decoration: none;
  color: inherit;
}

.card:hover { border-color: var(--accent); }
.card h2 { margin: 0 0 8px; font-size: 17px; }
.card p { margin: 0 0 14px; color: var(--muted); font-size: 14px; }

.tag {
  font-size: 11px;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 2px 8px;
}

.page-head h1 { font-size: 26px; margin: 0 0 6px; letter-spacing: -.02em; }
.page-head p { margin: 0; color: var(--muted); }

.panel {
  margin-top: 28px;
  padding: 20px 24px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel);
}

.panel h2 { margin: 0 0 12px; font-size: 14px; color: var(--muted); font-weight: 600; }
.planned { margin: 0; padding-left: 18px; color: var(--muted); }
.planned li { margin-bottom: 6px; }

footer {
  border-top: 1px solid var(--line);
  padding: 20px 24px;
  color: var(--muted);
  font-size: 12px;
  text-align: center;
}

a { color: var(--accent); }