:root {
  --bg: #f8fafc;
  --card: #fff;
  --border: #e5e7eb;
  --muted: #6b7280;
  --primary: #2563eb;
  --danger: #ef4444;
  --ok: #16a34a;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: #111;
  font: 14px/1.4 system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans KR", sans-serif;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
}

.row {
  display: flex;
  gap: 8px;
  align-items: center;
}

.btn {
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 8px;
  padding: 8px 12px;
  cursor: pointer;
  font-size: 14px;
  transition: all 0.2s;
}

.btn:hover {
  background: #f9fafb;
}

.btn.primary {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.btn.primary:hover {
  background: #1d4ed8;
}

.btn.danger {
  background: var(--danger);
  color: #fff;
  border-color: var(--danger);
}

.btn.danger:hover {
  background: #dc2626;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.input {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 12px;
  width: 100%;
  font-size: 14px;
}

.input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.meta {
  color: var(--muted);
  font-size: 12px;
}

.header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: linear-gradient(#fff, #fff);
  border-bottom: 1px solid var(--border);
  padding: 12px 0;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px;
}

.grid {
  display: grid;
  gap: 16px;
}

.grow {
  flex: 1;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 8px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: #fff;
  font-size: 12px;
}

.mono {
  font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
}

/* 반응형 */
@media (max-width: 768px) {
  .container {
    padding: 12px;
  }
  
  .grid {
    gap: 12px;
  }
  
  .row {
    flex-wrap: wrap;
  }
}