body {
  font-family: Arial, sans-serif;
  background: #f7f9fc;
  color: #1f2937;
  margin: 0;
}

/* Navigation */
.nav-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #1e293b;
  color: #fff;
  padding: 0 24px;
  height: 52px;
}

.nav-logo {
  font-weight: bold;
  font-size: 1.1rem;
  color: #fff;
  text-decoration: none;
}

.nav-menu {
  list-style: none;
  display: flex;
  gap: 18px;
  margin: 0;
  padding: 0;
}

.nav-menu a {
  color: #94a3b8;
  text-decoration: none;
  font-size: 0.95rem;
  padding: 4px 8px;
  border-radius: 4px;
}

.nav-menu a:hover,
.nav-menu a.active {
  color: #fff;
  background: #334155;
}

/* Containers */
.container {
  max-width: 720px;
  margin: 80px auto;
  padding: 24px;
}

.container-wide {
  max-width: 1200px;
  margin: 24px auto;
  padding: 24px;
}

/* Panel layout (좌/우 textarea) */
.panel-wrapper {
  display: flex;
  gap: 16px;
  margin-top: 16px;
}

.panel {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.panel-header {
  font-weight: bold;
  margin-bottom: 6px;
  font-size: 0.95rem;
  color: #475569;
}

.panel-textarea {
  flex: 1;
  min-height: 360px;
  padding: 12px;
  font-family: "Consolas", "Courier New", monospace;
  font-size: 0.9rem;
  border: 1px solid #cbd5e1;
  border-radius: 8px;
  resize: vertical;
  background: #fff;
}

.panel-textarea:focus {
  outline: none;
  border-color: #3b82f6;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

.panel-textarea[readonly] {
  background: #f8fafc;
  color: #334155;
}

/* Buttons */
.btn-group {
  margin-top: 16px;
  display: flex;
  gap: 10px;
  justify-content: center;
}

.btn {
  padding: 10px 28px;
  font-size: 0.95rem;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-weight: 600;
}

.btn-primary {
  background: #3b82f6;
  color: #fff;
}

.btn-primary:hover {
  background: #2563eb;
}

.btn-secondary {
  background: #e2e8f0;
  color: #334155;
}

.btn-secondary:hover {
  background: #cbd5e1;
}

.btn-sm {
  padding: 6px 14px;
  font-size: 0.85rem;
  border: 1px solid #cbd5e1;
  border-radius: 5px;
  background: #fff;
  color: #334155;
  cursor: pointer;
}

.btn-sm:hover {
  background: #eef2ff;
  border-color: #3b82f6;
}

/* Sample operations bar */
.sample-ops {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.sample-label {
  font-weight: bold;
  font-size: 0.9rem;
  color: #475569;
}

/* Op selector inside panel header */
.op-select {
  margin-left: 12px;
  padding: 3px 8px;
  border: 1px solid #cbd5e1;
  border-radius: 4px;
  font-size: 0.85rem;
}

.card {
  margin-top: 20px;
  padding: 16px;
  background: white;
  border-radius: 10px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.08);
}

code {
  background: #eef2ff;
  padding: 2px 6px;
  border-radius: 6px;
}

/* ── Monitor Page ── */
.stats-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 16px;
}

.stats-table th {
  border: 1px solid #cbd5e1;
  padding: 12px 16px;
  text-align: center;
  font-size: 0.95rem;
  font-weight: 600;
  background: #f8fafc;
}

.used-info {
  font-size: 0.95rem;
  margin-bottom: 12px;
  color: #334155;
}

.task-cards {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  padding: 16px;
  border: 1px solid #cbd5e1;
  border-radius: 6px;
  min-height: 300px;
  align-content: flex-start;
}

.task-card {
  border: 1px solid #1f2937;
  padding: 10px 14px;
  font-size: 0.85rem;
  line-height: 1.6;
  min-width: 180px;
}

.task-card--black {
  color: #1f2937;
  border-color: #1f2937;
}

.task-card--red {
  color: #dc2626;
  border-color: #dc2626;
}