:root {
  --bg: #0f1115;
  --bg-alt: #171a21;
  --card: #1c2029;
  --border: #2a2f3a;
  --text: #e8eaed;
  --text-dim: #9aa0ac;
  --accent: #6c8cff;
  --accent-2: #7ee0c3;
  --radius: 14px;
  --max-width: 960px;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f6f7fb;
    --bg-alt: #ffffff;
    --card: #ffffff;
    --border: #e2e5ec;
    --text: #1a1d24;
    --text-dim: #5b6270;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Pretendard", "Noto Sans KR", sans-serif;
  line-height: 1.6;
}

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

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 32px 20px 80px;
}

header.site {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 20px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-alt);
}

header.site .brand {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text);
}

header.site nav a {
  margin-left: 18px;
  color: var(--text-dim);
  font-size: 0.95rem;
}

header.site nav a:hover { color: var(--text); }

.hero {
  text-align: center;
  padding: 48px 0 36px;
}

.hero h1 {
  font-size: 2.1rem;
  margin: 0 0 10px;
}

.hero p {
  color: var(--text-dim);
  font-size: 1.05rem;
  margin: 0;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
  margin-top: 28px;
}

.card {
  display: block;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  transition: transform 0.15s ease, border-color 0.15s ease;
}

.card:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
  text-decoration: none;
}

.card .icon {
  font-size: 1.6rem;
  margin-bottom: 10px;
}

.card h3 {
  margin: 0 0 6px;
  font-size: 1.05rem;
  color: var(--text);
}

.card p {
  margin: 0;
  color: var(--text-dim);
  font-size: 0.9rem;
}

.tag {
  display: inline-block;
  margin-top: 10px;
  font-size: 0.72rem;
  padding: 2px 8px;
  border-radius: 999px;
  background: rgba(108, 140, 255, 0.15);
  color: var(--accent);
}

.tool-panel {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  margin-bottom: 20px;
}

.tool-panel h2 {
  margin-top: 0;
  font-size: 1.15rem;
}

.tool-panel textarea,
.tool-panel input[type="text"] {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  padding: 12px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.9rem;
  resize: vertical;
}

.tool-panel textarea { min-height: 140px; }

.row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin: 10px 0;
}

button, .btn {
  cursor: pointer;
  background: var(--accent);
  color: #0b0d12;
  border: none;
  border-radius: 8px;
  padding: 9px 16px;
  font-weight: 600;
  font-size: 0.88rem;
}

button.secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

button:hover { opacity: 0.9; }

.stats {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  margin-top: 10px;
  color: var(--text-dim);
  font-size: 0.85rem;
}

.stats b { color: var(--text); }

.breadcrumb {
  color: var(--text-dim);
  font-size: 0.9rem;
  margin-bottom: 18px;
}

footer.site {
  text-align: center;
  color: var(--text-dim);
  font-size: 0.85rem;
  padding: 30px 20px;
  border-top: 1px solid var(--border);
}