/* ============================================================
   地铁调度系统模拟器 · 全局样式
   暗色工业风 | 高对比度 | 微动效 | 响应式
   ============================================================ */

/* --- CSS 自定义属性 (主题色) --- */
:root {
  --color-bg: #0a0e17;
  --color-bg-card: #111827;
  --color-bg-card-hover: #1a2332;
  --color-bg-panel: #0d1321;
  --color-border: #1e2d3d;
  --color-border-active: #334155;

  --color-primary: #00e5ff;
  --color-primary-dim: #006978;
  --color-accent: #ff9100;
  --color-accent-dim: #994400;

  --color-danger: #ff1744;
  --color-warning: #ffab00;
  --color-success: #00e676;
  --color-info: #448aff;

  --color-text: #e0e0e0;
  --color-text-dim: #8899aa;
  --color-text-muted: #556677;

  --color-glow-primary: 0 0 12px rgba(0, 229, 255, 0.3);
  --color-glow-accent: 0 0 12px rgba(255, 145, 0, 0.3);
  --color-glow-danger: 0 0 12px rgba(255, 23, 68, 0.4);

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;

  --shadow-card: 0 2px 12px rgba(0, 0, 0, 0.4);
  --shadow-card-hover: 0 4px 24px rgba(0, 229, 255, 0.08);

  --font-mono: 'SF Mono', 'Cascadia Code', 'Consolas', 'Monaco', monospace;
  --font-sans: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', 'Segoe UI', sans-serif;

  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
}

/* --- 全局重置 --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  background-image:
    radial-gradient(ellipse at 20% 20%, rgba(0, 229, 255, 0.03) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 80%, rgba(255, 145, 0, 0.03) 0%, transparent 50%);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* --- 语义化布局 --- */
header, nav, main, article, section, footer {
  display: block;
}

/* --- 导航栏 --- */
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  height: 56px;
  background: var(--color-bg-panel);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
}

.navbar-brand {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 8px;
  letter-spacing: 0.5px;
}

.navbar-brand:hover {
  text-shadow: var(--color-glow-primary);
}

.navbar-links {
  display: flex;
  gap: 4px;
  list-style: none;
}

.navbar-links a {
  color: var(--color-text-dim);
  text-decoration: none;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  transition: all var(--transition-fast);
}

.navbar-links a:hover,
.navbar-links a.active {
  color: var(--color-primary);
  background: rgba(0, 229, 255, 0.06);
}

/* --- 主容器 --- */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 24px;
}

/* --- 页面标题 --- */
.page-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 24px;
  color: var(--color-text);
  display: flex;
  align-items: center;
  gap: 10px;
}

.page-title .icon {
  font-size: 1.4rem;
}

/* --- 卡片 --- */
.card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-card);
}

.card:hover {
  background: var(--color-bg-card-hover);
  border-color: var(--color-border-active);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
}

.card-header {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.card-header .badge {
  font-size: 0.7rem;
  padding: 2px 8px;
  border-radius: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge-primary { background: rgba(0,229,255,0.15); color: var(--color-primary); }
.badge-accent  { background: rgba(255,145,0,0.15); color: var(--color-accent); }
.badge-danger  { background: rgba(255,23,68,0.15); color: var(--color-danger); }
.badge-success { background: rgba(0,230,118,0.15); color: var(--color-success); }
.badge-warning { background: rgba(255,171,0,0.15); color: var(--color-warning); }

/* --- 按钮 --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg-card);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
  user-select: none;
}

.btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  box-shadow: var(--color-glow-primary);
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background: rgba(0, 229, 255, 0.1);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn-primary:hover {
  background: rgba(0, 229, 255, 0.18);
  box-shadow: var(--color-glow-primary);
}

.btn-accent {
  background: rgba(255, 145, 0, 0.1);
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.btn-accent:hover {
  background: rgba(255, 145, 0, 0.18);
  box-shadow: var(--color-glow-accent);
}

.btn-danger {
  background: rgba(255, 23, 68, 0.1);
  border-color: var(--color-danger);
  color: var(--color-danger);
}

.btn-danger:hover {
  background: rgba(255, 23, 68, 0.18);
  box-shadow: var(--color-glow-danger);
}

.btn-sm {
  padding: 6px 12px;
  font-size: 0.8rem;
}

.btn-lg {
  padding: 14px 28px;
  font-size: 1rem;
}

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  pointer-events: none;
}

/* --- 表单 --- */
.form-group {
  margin-bottom: 16px;
}

.form-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-text-dim);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 10px 14px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  transition: border-color var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(0, 229, 255, 0.1);
}

.form-input::placeholder {
  color: var(--color-text-muted);
}

.form-textarea {
  resize: vertical;
  min-height: 80px;
}

.form-select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%238899aa' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}

/* --- 表格 --- */
.table-wrapper {
  overflow-x: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}

thead {
  background: var(--color-bg-panel);
}

th {
  padding: 12px 16px;
  text-align: left;
  font-weight: 600;
  color: var(--color-text-dim);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-bottom: 2px solid var(--color-border);
  white-space: nowrap;
}

td {
  padding: 10px 16px;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text);
}

tr:last-child td {
  border-bottom: none;
}

tr:hover td {
  background: rgba(0, 229, 255, 0.03);
}

/* --- 网格布局 --- */
.grid {
  display: grid;
  gap: 20px;
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* --- 弹性布局 --- */
.flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.flex-between { justify-content: space-between; }
.flex-center { align-items: center; justify-content: center; }
.gap-sm { gap: 8px; }
.gap-md { gap: 16px; }
.gap-lg { gap: 24px; }

/* --- 工具类 --- */
.text-primary { color: var(--color-primary); }
.text-accent { color: var(--color-accent); }
.text-danger { color: var(--color-danger); }
.text-success { color: var(--color-success); }
.text-warning { color: var(--color-warning); }
.text-dim { color: var(--color-text-dim); }
.text-muted { color: var(--color-text-muted); }
.text-mono { font-family: var(--font-mono); }
.text-sm { font-size: 0.8rem; }
.text-lg { font-size: 1.15rem; }
.text-xl { font-size: 1.5rem; }
.text-2xl { font-size: 2rem; }
.text-center { text-align: center; }
.font-bold { font-weight: 700; }

.mt-sm { margin-top: 8px; }
.mt-md { margin-top: 16px; }
.mt-lg { margin-top: 24px; }
.mb-sm { margin-bottom: 8px; }
.mb-md { margin-bottom: 16px; }
.mb-lg { margin-bottom: 24px; }

/* --- 渐变标题 --- */
.gradient-text {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* --- 脉冲动画 (数据刷新) --- */
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.pulse {
  animation: pulse 2s ease-in-out infinite;
}

/* --- 发光边框动画 --- */
@keyframes glow-border {
  0%, 100% { border-color: var(--color-border); }
  50% { border-color: var(--color-primary); }
}

.glow-border {
  animation: glow-border 3s ease-in-out infinite;
}

/* --- 告警闪烁 --- */
@keyframes alert-blink {
  0%, 100% { background: rgba(255, 23, 68, 0.1); }
  50% { background: rgba(255, 23, 68, 0.25); }
}

.alert-blink {
  animation: alert-blink 1s ease-in-out infinite;
}

/* --- 状态指示灯 --- */
.status-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  margin-right: 6px;
}

.status-dot.online { background: var(--color-success); box-shadow: 0 0 6px var(--color-success); }
.status-dot.warning { background: var(--color-warning); box-shadow: 0 0 6px var(--color-warning); }
.status-dot.offline { background: var(--color-danger); box-shadow: 0 0 6px var(--color-danger); }
.status-dot.idle { background: var(--color-text-muted); }

/* --- 数据面板数值 --- */
.stat-value {
  font-family: var(--font-mono);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.2;
}

.stat-label {
  font-size: 0.75rem;
  color: var(--color-text-dim);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* --- 进度条 --- */
.progress-bar {
  height: 6px;
  background: var(--color-border);
  border-radius: 3px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  border-radius: 3px;
  transition: width 0.5s ease;
}

.progress-bar-fill.primary { background: var(--color-primary); }
.progress-bar-fill.accent { background: var(--color-accent); }
.progress-bar-fill.danger { background: var(--color-danger); }
.progress-bar-fill.success { background: var(--color-success); }

/* --- Toast 提示 --- */
.toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 500;
  color: #fff;
  animation: toast-in 0.3s ease;
  box-shadow: 0 4px 16px rgba(0,0,0,0.4);
  max-width: 360px;
}

.toast-info { background: var(--color-info); }
.toast-success { background: #1b5e20; }
.toast-warning { background: #e65100; }
.toast-error { background: #b71c1c; }

@keyframes toast-in {
  from { opacity: 0; transform: translateX(40px); }
  to { opacity: 1; transform: translateX(0); }
}

/* --- Modal 弹层 --- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  backdrop-filter: blur(4px);
}

.modal {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  min-width: 400px;
  max-width: 90vw;
  box-shadow: 0 8px 40px rgba(0,0,0,0.6);
}

.modal-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 16px;
}

/* --- 响应式 --- */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .navbar { padding: 0 12px; }
  .navbar-links a { padding: 6px 10px; font-size: 0.8rem; }
  .container { padding: 16px; }
  .page-title { font-size: 1.2rem; }
  .stat-value { font-size: 1.3rem; }
  .modal { min-width: auto; width: 95vw; padding: 20px; }
}

@media (max-width: 480px) {
  .navbar-brand { font-size: 0.9rem; }
  .navbar-links { gap: 0; }
  .navbar-links a { padding: 6px 8px; font-size: 0.7rem; }
}