/**
 * Apple Human Interface Guidelines (HIG) Design System
 * MailOps Asset Governance - iOS Native Web Experience
 */

:root {
  --ios-bg: #F2F2F7;
  --ios-card-bg: rgba(255, 255, 255, 0.72);
  --ios-card-solid: #FFFFFF;
  --ios-grouped-bg: #E5E5EA;
  --ios-separator: rgba(60, 60, 67, 0.12);
  --ios-label: #000000;
  --ios-secondary-label: #6C6C70;
  --ios-tertiary-label: #8E8E93;
  --ios-quaternary-label: rgba(60, 60, 67, 0.18);
  
  --ios-blue: #007AFF;
  --ios-green: #34C759;
  --ios-indigo: #5856D6;
  --ios-orange: #FF9500;
  --ios-pink: #FF2D55;
  --ios-purple: #AF52DE;
  --ios-red: #FF3B30;
  --ios-teal: #5AC8FA;
  --ios-yellow: #FFCC00;
  
  --ios-card-border: rgba(255, 255, 255, 0.65);
  --ios-shadow-subtle: 0 4px 20px -2px rgba(0, 0, 0, 0.05), 0 2px 6px -1px rgba(0, 0, 0, 0.03);
  --ios-shadow-float: 0 12px 36px -4px rgba(0, 0, 0, 0.12), 0 4px 12px rgba(0, 0, 0, 0.04);
  --ios-radius-sm: 10px;
  --ios-radius-md: 14px;
  --ios-radius-lg: 20px;
  --ios-radius-xl: 28px;
  --ios-blur: blur(28px) saturate(190%);
}

@media (prefers-color-scheme: dark) {
  :root {
    --ios-bg: #000000;
    --ios-card-bg: rgba(28, 28, 30, 0.75);
    --ios-card-solid: #1C1C1E;
    --ios-grouped-bg: #1C1C1E;
    --ios-separator: rgba(84, 84, 88, 0.35);
    --ios-label: #FFFFFF;
    --ios-secondary-label: #8E8E93;
    --ios-tertiary-label: #636366;
    --ios-quaternary-label: rgba(235, 235, 245, 0.18);
    --ios-card-border: rgba(255, 255, 255, 0.12);
    --ios-shadow-subtle: 0 4px 24px -2px rgba(0, 0, 0, 0.4);
    --ios-shadow-float: 0 12px 40px -4px rgba(0, 0, 0, 0.7);
  }
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Icons", "Helvetica Neue", Helvetica, Arial, sans-serif;
  background-color: var(--ios-bg);
  color: var(--ios-label);
  line-height: 1.45;
  letter-spacing: -0.015em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  padding-bottom: 72px;
}

/* 动态弥散环境背景光 (Apple 柔光晕) */
.ambient-glow {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 380px;
  background: radial-gradient(circle at 50% -20%, rgba(0, 122, 255, 0.18), transparent 70%),
              radial-gradient(circle at 85% 20%, rgba(52, 199, 89, 0.12), transparent 50%),
              radial-gradient(circle at 15% 30%, rgba(175, 82, 222, 0.10), transparent 50%);
  pointer-events: none;
  z-index: 0;
}

/* 导航栏 - 顶部毛玻璃大标题 */
.ios-nav-wrap {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--ios-card-bg);
  -webkit-backdrop-filter: var(--ios-blur);
  backdrop-filter: var(--ios-blur);
  border-bottom: 0.5px solid var(--ios-separator);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.ios-nav {
  max-width: 1080px;
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.ios-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--ios-label);
}

.ios-logo-badge {
  width: 36px;
  height: 36px;
  border-radius: var(--ios-radius-sm);
  background: linear-gradient(135deg, #007AFF 0%, #5856D6 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #FFFFFF;
  box-shadow: 0 4px 10px rgba(0, 122, 255, 0.35);
}

.ios-brand-text h1 {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.ios-brand-text p {
  font-size: 11px;
  color: var(--ios-secondary-label);
  letter-spacing: 0.01em;
}

/* 原生 iOS 三级路由分段控制器 (Segmented Control) */
.ios-nav-tabs {
  display: flex;
  background: var(--ios-grouped-bg);
  padding: 3px;
  border-radius: 12px;
  gap: 2px;
  box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.04);
}

.ios-tab-item {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  font-size: 13px;
  font-weight: 500;
  color: var(--ios-secondary-label);
  text-decoration: none;
  border-radius: 9px;
  transition: all 0.22s cubic-bezier(0.16, 1, 0.3, 1);
}

.ios-tab-item:hover {
  color: var(--ios-label);
}

.ios-tab-item.active {
  background: var(--ios-card-solid);
  color: var(--ios-label);
  font-weight: 600;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.10), 0 0.5px 2px rgba(0, 0, 0, 0.05);
  transform: scale(1.01);
}

/* 页面内容容器 */
.ios-container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 24px 20px;
  position: relative;
  z-index: 1;
}

/* iOS 大标题与副标 */
.ios-large-header {
  margin-bottom: 24px;
}

.ios-large-header .subtitle {
  font-size: 12px;
  text-transform: uppercase;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--ios-blue);
  margin-bottom: 4px;
}

.ios-large-header .title {
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--ios-label);
}

.ios-large-header .caption {
  font-size: 15px;
  color: var(--ios-secondary-label);
  margin-top: 6px;
}

/* 毛玻璃材质卡片 */
.ios-card {
  background: var(--ios-card-bg);
  -webkit-backdrop-filter: var(--ios-blur);
  backdrop-filter: var(--ios-blur);
  border: 1px solid var(--ios-card-border);
  border-radius: var(--ios-radius-lg);
  padding: 22px;
  box-shadow: var(--ios-shadow-subtle);
  margin-bottom: 20px;
  transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.2s;
}

.ios-card-hero {
  border-radius: var(--ios-radius-xl);
  padding: 32px 28px;
  background: linear-gradient(135deg, rgba(255,255,255,0.85) 0%, rgba(240,245,255,0.7) 100%);
}

@media (prefers-color-scheme: dark) {
  .ios-card-hero {
    background: linear-gradient(135deg, rgba(30,30,34,0.85) 0%, rgba(18,24,38,0.7) 100%);
  }
}

/* 卡片标题 */
.ios-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 0.5px solid var(--ios-separator);
}

.ios-card-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.02em;
}

/* 网格排布 */
.ios-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 18px;
  margin-bottom: 20px;
}

.ios-grid-4 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 20px;
}

/* 指标卡 (Metric Widget) */
.ios-metric-card {
  padding: 18px;
  border-radius: var(--ios-radius-md);
  background: var(--ios-card-bg);
  -webkit-backdrop-filter: var(--ios-blur);
  backdrop-filter: var(--ios-blur);
  border: 1px solid var(--ios-card-border);
  box-shadow: var(--ios-shadow-subtle);
  position: relative;
  overflow: hidden;
}

.ios-metric-label {
  font-size: 13px;
  font-weight: 500;
  color: var(--ios-secondary-label);
  display: flex;
  align-items: center;
  gap: 6px;
}

.ios-metric-value {
  font-size: 30px;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin: 8px 0 4px;
  color: var(--ios-label);
  font-variant-numeric: tabular-nums;
}

.ios-metric-foot {
  font-size: 12px;
  color: var(--ios-tertiary-label);
  display: flex;
  align-items: center;
  gap: 4px;
}

/* iOS 胶囊徽标 (Capsule Badge) */
.ios-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 9px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.ios-badge-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
}

.ios-badge-green {
  background: rgba(52, 199, 89, 0.15);
  color: #248A3D;
}
.ios-badge-green .ios-badge-dot { background: #34C759; }

.ios-badge-orange {
  background: rgba(255, 149, 0, 0.16);
  color: #C97200;
}
.ios-badge-orange .ios-badge-dot { background: #FF9500; }

.ios-badge-red {
  background: rgba(255, 59, 48, 0.16);
  color: #D70015;
}
.ios-badge-red .ios-badge-dot { background: #FF3B30; }

.ios-badge-blue {
  background: rgba(0, 122, 255, 0.15);
  color: #007AFF;
}
.ios-badge-blue .ios-badge-dot { background: #007AFF; }

@media (prefers-color-scheme: dark) {
  .ios-badge-green { color: #30D158; }
  .ios-badge-orange { color: #FF9F0A; }
  .ios-badge-red { color: #FF453A; }
  .ios-badge-blue { color: #0A84FF; }
}

/* iOS 原生嵌入列表分组 (Inset Grouped List) */
.ios-list-group {
  background: var(--ios-card-solid);
  border-radius: var(--ios-radius-md);
  border: 1px solid var(--ios-card-border);
  overflow: hidden;
  box-shadow: var(--ios-shadow-subtle);
}

.ios-list-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  border-bottom: 0.5px solid var(--ios-separator);
  transition: background 0.18s;
  text-decoration: none;
  color: inherit;
}

.ios-list-item:last-child {
  border-bottom: none;
}

.ios-list-item:hover {
  background: rgba(0, 0, 0, 0.02);
}

@media (prefers-color-scheme: dark) {
  .ios-list-item:hover {
    background: rgba(255, 255, 255, 0.04);
  }
}

.ios-item-left {
  display: flex;
  align-items: center;
  gap: 14px;
}

.ios-item-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #FFF;
  flex-shrink: 0;
}

.ios-item-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--ios-label);
}

.ios-item-subtitle {
  font-size: 12px;
  color: var(--ios-secondary-label);
  margin-top: 2px;
}

.ios-item-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* 按钮系列 (Apple iOS HIG 按钮) */
.ios-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 18px;
  border-radius: var(--ios-radius-md);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: none;
  outline: none;
  transition: all 0.18s cubic-bezier(0.16, 1, 0.3, 1);
  letter-spacing: -0.01em;
}

.ios-btn:active {
  transform: scale(0.97);
}

.ios-btn-primary {
  background: var(--ios-blue);
  color: #FFFFFF;
  box-shadow: 0 4px 12px rgba(0, 122, 255, 0.35);
}

.ios-btn-primary:hover {
  background: #0066D6;
}

.ios-btn-tinted {
  background: rgba(0, 122, 255, 0.12);
  color: var(--ios-blue);
}

.ios-btn-tinted:hover {
  background: rgba(0, 122, 255, 0.20);
}

.ios-btn-secondary {
  background: var(--ios-grouped-bg);
  color: var(--ios-label);
}

.ios-btn-sm {
  padding: 6px 12px;
  font-size: 12px;
  border-radius: 8px;
}

/* iOS 原生单行代码框 / Token 展示框 */
.ios-token-box {
  background: var(--ios-grouped-bg);
  border-radius: 8px;
  padding: 6px 10px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 12px;
  color: var(--ios-secondary-label);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 0.5px solid var(--ios-separator);
}

/* 输入表单 */
.ios-input-group {
  margin-bottom: 16px;
}

.ios-input-label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--ios-secondary-label);
  margin-bottom: 6px;
}

.ios-input {
  width: 100%;
  padding: 12px 14px;
  border-radius: var(--ios-radius-md);
  border: 1px solid var(--ios-separator);
  background: var(--ios-card-solid);
  color: var(--ios-label);
  font-size: 15px;
  outline: none;
  transition: all 0.2s;
}

.ios-input:focus {
  border-color: var(--ios-blue);
  box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.18);
}

/* 拓扑节点卡片 */
.ios-node-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 14px;
  background: var(--ios-grouped-bg);
  border-radius: var(--ios-radius-sm);
  margin-bottom: 8px;
}

/* 原生 iOS HUD 提示气泡 (HUD Toast) */
.ios-hud {
  position: fixed;
  top: 76px;
  left: 50%;
  transform: translateX(-50%) translateY(-20px);
  background: rgba(30, 30, 30, 0.88);
  -webkit-backdrop-filter: blur(20px);
  backdrop-filter: blur(20px);
  color: #FFFFFF;
  padding: 10px 20px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 8px;
  box-shadow: var(--ios-shadow-float);
  opacity: 0;
  pointer-events: none;
  transition: all 0.32s cubic-bezier(0.16, 1, 0.3, 1);
  z-index: 9999;
}

.ios-hud.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* 响应式调整 */
@media (max-width: 640px) {
  .ios-nav {
    flex-direction: column;
    gap: 12px;
    align-items: stretch;
  }
  .ios-nav-tabs {
    justify-content: space-between;
  }
  .ios-tab-item {
    flex: 1;
    justify-content: center;
    padding: 7px 8px;
    font-size: 12px;
  }
  .ios-large-header .title {
    font-size: 26px;
  }
  .ios-grid {
    grid-template-columns: 1fr;
  }
  .ios-item-right {
    flex-direction: column;
    align-items: flex-end;
    gap: 6px;
  }
}