:root {
  --bg-canvas: #0d1117;
  --bg-surface: #161b22;
  --bg-elevated: #1f242c;
  --bg-hover: #21262d;
  --border-color: #30363d;
  --text-primary: #e6edf3;
  --text-secondary: #8b949e;
  --text-muted: #6e7681;
  --accent-blue: #58a6ff;
  --accent-green: #3fb950;
  --accent-red: #f85149;
  --accent-purple: #bc8cff;
  --accent-yellow: #d29922;
}

html, body {
  background-color: var(--bg-canvas) !important;
  color: var(--text-primary) !important;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft JhengHei", Roboto, Helvetica, Arial, sans-serif;
  min-height: 100vh;
}

/* 導覽列 */
.soc-navbar {
  background-color: #161b22 !important;
  border-bottom: 1px solid var(--border-color);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.45);
}

.soc-brand {
  color: var(--text-primary) !important;
  font-weight: 700;
  letter-spacing: 0.4px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.soc-brand-badge {
  background: rgba(88, 166, 255, 0.15);
  color: var(--accent-blue);
  border: 1px solid rgba(88, 166, 255, 0.35);
  font-size: 0.72rem;
  padding: 2px 8px;
  border-radius: 999px;
}

.soc-nav-link {
  color: var(--text-secondary) !important;
  font-weight: 500;
  padding: 0.5rem 1rem !important;
  border-radius: 6px;
  transition: all 0.15s ease;
}

.soc-nav-link:hover, .soc-nav-link.active {
  color: var(--text-primary) !important;
  background-color: rgba(88, 166, 255, 0.12);
}

/* 卡片與面板 */
.soc-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.3);
}

.soc-card-header {
  padding: 0.9rem 1.25rem;
  border-bottom: 1px solid var(--border-color);
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.soc-card-body {
  padding: 1.25rem;
}

/* KPI 統計指標卡 */
.kpi-card {
  background: linear-gradient(145deg, #161b22 0%, #1a2029 100%);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 1.2rem 1.35rem;
  position: relative;
  overflow: hidden;
}

.kpi-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
}

.kpi-blue::before { background-color: var(--accent-blue); }
.kpi-red::before { background-color: var(--accent-red); }
.kpi-purple::before { background-color: var(--accent-purple); }
.kpi-green::before { background-color: var(--accent-green); }

.kpi-label {
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.kpi-value {
  font-size: 2rem;
  font-weight: 700;
  margin: 0.25rem 0;
  font-variant-numeric: tabular-nums;
}

.kpi-sub {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* 狀態燈號 */
.status-dot {
  display: inline-block;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  margin-right: 6px;
}

.status-online {
  background-color: var(--accent-green);
  box-shadow: 0 0 8px var(--accent-green);
}

.status-offline {
  background-color: var(--accent-red);
  box-shadow: 0 0 8px var(--accent-red);
}

/* 標籤與徽章 */
.ip-mono {
  font-family: Consolas, "Cascadia Mono", "Courier New", monospace;
  font-size: 0.9rem;
}

.badge-subnet {
  background-color: rgba(188, 140, 255, 0.16);
  color: #d2a8ff;
  border: 1px solid rgba(188, 140, 255, 0.4);
  padding: 0.22rem 0.55rem;
  border-radius: 6px;
  font-family: Consolas, monospace;
  font-size: 0.82rem;
}

.badge-singleip {
  background-color: rgba(248, 81, 73, 0.15);
  color: #ff7b72;
  border: 1px solid rgba(248, 81, 73, 0.4);
  padding: 0.22rem 0.55rem;
  border-radius: 6px;
  font-family: Consolas, monospace;
  font-size: 0.82rem;
}

.badge-agent {
  background-color: rgba(88, 166, 255, 0.15);
  color: var(--accent-blue);
  border: 1px solid rgba(88, 166, 255, 0.35);
  padding: 0.16rem 0.5rem;
  border-radius: 5px;
  font-size: 0.78rem;
  white-space: nowrap;
  display: inline-block;
}

.badge-agent:hover {
  background-color: rgba(88, 166, 255, 0.28);
  color: #ffffff;
}

.badge-site {
  background-color: rgba(139, 148, 158, 0.15);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  padding: 0.18rem 0.45rem;
  border-radius: 4px;
  font-family: Consolas, monospace;
  font-size: 0.78rem;
}

/* 表格深色化 */
.soc-table {
  color: var(--text-primary) !important;
  margin-bottom: 0;
}

.soc-table thead th {
  background-color: #1c2128 !important;
  color: var(--text-secondary) !important;
  border-bottom: 1px solid var(--border-color) !important;
  font-size: 0.82rem;
  font-weight: 600;
  text-transform: uppercase;
  padding: 0.75rem 0.9rem;
  white-space: nowrap;
}

.soc-table tbody td {
  background-color: transparent !important;
  color: var(--text-primary) !important;
  border-bottom: 1px solid #21262d !important;
  padding: 0.7rem 0.9rem;
  vertical-align: middle;
  font-size: 0.88rem;
}

.soc-table tbody tr:hover td {
  background-color: var(--bg-hover) !important;
}

/* 表單輸入框深色化 */
.soc-input, .soc-select {
  background-color: #0d1117 !important;
  border: 1px solid var(--border-color) !important;
  color: var(--text-primary) !important;
  border-radius: 6px;
}

.soc-input:focus, .soc-select:focus {
  border-color: var(--accent-blue) !important;
  box-shadow: 0 0 0 3px rgba(88, 166, 255, 0.2) !important;
}

.soc-input::placeholder {
  color: var(--text-muted) !important;
}

/* 進度條統計列 */
.stat-progress {
  height: 8px;
  background-color: #21262d;
  border-radius: 999px;
  overflow: hidden;
}

.stat-progress-bar {
  height: 100%;
  background: linear-gradient(90deg, #58a6ff, #bc8cff);
  border-radius: 999px;
}

/* 登入卡片 */
.login-wrapper {
  min-height: calc(100vh - 120px);
  display: flex;
  align-items: center;
  justify-content: center;
}

.login-card {
  width: 100%;
  max-width: 430px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 2.25rem;
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.6);
}