/* ==================== 全局变量 ==================== */

:root {
  /* 浅色主题（默认） */
  --bg: #f5f7fa;
  --surface: #ffffff;
  --surface-hover: #f7f8fa;
  --surface-2: #eef0f4;
  --text: #1a1c20;
  --text-secondary: #5f6470;
  --border: #e1e4ea;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-text: #ffffff;
  --accent: #10b981;
  --danger: #ef4444;
  --warning: #f59e0b;
  --shadow: 0 2px 12px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 8px 24px rgba(15, 23, 42, 0.1);
  --radius-sm: 10px;
  --radius: 16px;
  --radius-lg: 20px;
  --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 560px;
  --header-safe-top: env(safe-area-inset-top, 0px);
  --main-safe-bottom: env(safe-area-inset-bottom, 0px);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0d12;
    --surface: #151821;
    --surface-hover: #1d2029;
    --surface-2: #1e212b;
    --text: #f1f2f5;
    --text-secondary: #9aa0ad;
    --border: #2a2e3a;
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --primary-text: #ffffff;
    --accent: #34d399;
    --danger: #f87171;
    --warning: #fbbf24;
    --shadow: 0 2px 12px rgba(0, 0, 0, 0.25);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.35);
  }
}

/* 手动主题覆盖 */
html[data-theme="light"] {
  --bg: #f5f7fa;
  --surface: #ffffff;
  --surface-hover: #f7f8fa;
  --surface-2: #eef0f4;
  --text: #1a1c20;
  --text-secondary: #5f6470;
  --border: #e1e4ea;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-text: #ffffff;
  --accent: #10b981;
  --danger: #ef4444;
  --warning: #f59e0b;
  --shadow: 0 2px 12px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 8px 24px rgba(15, 23, 42, 0.1);
}

html[data-theme="dark"] {
  --bg: #0b0d12;
  --surface: #151821;
  --surface-hover: #1d2029;
  --surface-2: #1e212b;
  --text: #f1f2f5;
  --text-secondary: #9aa0ad;
  --border: #2a2e3a;
  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --primary-text: #ffffff;
  --accent: #34d399;
  --danger: #f87171;
  --warning: #fbbf24;
  --shadow: 0 2px 12px rgba(0, 0, 0, 0.25);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.35);
}

/* ==================== 基础重置 ==================== */

*, *::before, *::after {
  box-sizing: border-box;
}

* {
  margin: 0;
  padding: 0;
}

html {
  -webkit-text-size-adjust: 100%;
  touch-action: manipulation;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  background-color: var(--bg);
  color: var(--text);
  min-height: 100dvh;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  transition: background-color var(--transition), color var(--transition);
}

button, input, select {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

ul {
  list-style: none;
}

.hidden {
  display: none !important;
}

/* ==================== 顶部导航 ==================== */

.app-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(var(--surface-rgb, 255, 255, 255), 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding-top: var(--header-safe-top);
  transition: background-color var(--transition), border-color var(--transition);
}

@media (prefers-color-scheme: dark) {
  .app-header {
    background-color: rgba(21, 24, 33, 0.85);
  }
}

html[data-theme="light"] .app-header {
  background-color: rgba(255, 255, 255, 0.85);
}

html[data-theme="dark"] .app-header {
  background-color: rgba(21, 24, 33, 0.85);
}

.header-content {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 12px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.app-title {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

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

.icon-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  background-color: var(--surface-2);
  color: var(--text);
  transition: transform var(--transition), background-color var(--transition);
}

.icon-btn:active {
  transform: scale(0.92);
}

.icon-btn:hover {
  background-color: var(--border);
}

/* ==================== 搜索栏 ==================== */

.search-bar {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 16px 12px;
}

#search-input {
  width: 100%;
  height: 48px;
  padding: 0 16px;
  font-size: 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background-color: var(--surface);
  color: var(--text);
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition), background-color var(--transition);
}

#search-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

/* ==================== 主内容区 ==================== */

.app-main {
  flex: 1;
  max-width: var(--max-width);
  width: 100%;
  margin: 0 auto;
  padding: 16px;
  padding-bottom: calc(24px + var(--main-safe-bottom));
}

.view {
  animation: fadeIn 0.25s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.section-header,
.view-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.section-header h2,
.view-header h2 {
  font-size: 1.25rem;
  font-weight: 700;
}

.view-header h2 {
  flex: 1;
  min-width: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.back-btn {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--primary);
  padding: 8px 4px;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition);
}

.back-btn:active {
  background-color: var(--surface-2);
}

.meta-badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  background-color: var(--surface-2);
  color: var(--text-secondary);
}

/* ==================== 卡片列表 ==================== */

.card-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.card {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px;
  transition: transform var(--transition), box-shadow var(--transition), background-color var(--transition);
}

.card:active {
  transform: scale(0.985);
}

.country-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  cursor: pointer;
}

.country-card:hover {
  box-shadow: var(--shadow-lg);
}

.country-info {
  display: flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}

.country-flag {
  font-size: 2rem;
  line-height: 1;
  flex-shrink: 0;
}

.country-meta {
  min-width: 0;
}

.country-name {
  font-size: 1.1rem;
  font-weight: 700;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.country-count {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.country-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.fav-btn {
  width: 44px;
  height: 44px;
  font-size: 1.4rem;
  color: var(--text-secondary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition), color var(--transition), background-color var(--transition);
}

.fav-btn.active {
  color: var(--warning);
}

.fav-btn:active {
  transform: scale(0.88);
  background-color: var(--surface-2);
}

.chevron {
  font-size: 1.4rem;
  color: var(--text-secondary);
  line-height: 1;
}

/* ==================== 排序栏 ==================== */

.sort-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
  padding: 12px 16px;
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow);
}

.sort-bar label {
  font-weight: 600;
  font-size: 0.95rem;
}

#sort-select {
  flex: 1;
  max-width: 220px;
  height: 44px;
  padding: 0 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background-color: var(--surface-2);
  color: var(--text);
  font-size: 0.95rem;
  outline: none;
}

#sort-select:focus {
  border-color: var(--primary);
}

/* ==================== 节点卡片 ==================== */

.node-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  cursor: pointer;
}

.node-card:hover {
  box-shadow: var(--shadow-lg);
}

.node-main {
  flex: 1;
  min-width: 0;
}

.node-ip {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 6px;
  word-break: break-all;
}

.node-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 6px;
}

.stat {
  display: inline-flex;
  align-items: center;
  padding: 3px 8px;
  border-radius: 6px;
  font-size: 0.78rem;
  font-weight: 600;
  background-color: var(--surface-2);
  color: var(--text-secondary);
}

.stat.ping {
  color: var(--accent);
  background-color: rgba(16, 185, 129, 0.1);
}

.stat.speed {
  color: var(--primary);
  background-color: rgba(37, 99, 235, 0.1);
}

.node-isp {
  font-size: 0.85rem;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.copy-ip-btn {
  flex-shrink: 0;
  height: 40px;
  padding: 0 16px;
  border-radius: var(--radius-sm);
  background-color: var(--surface-2);
  color: var(--primary);
  font-weight: 600;
  font-size: 0.9rem;
  transition: background-color var(--transition), color var(--transition), transform var(--transition);
}

.copy-ip-btn:active {
  transform: scale(0.95);
}

.copy-ip-btn:hover {
  background-color: var(--primary);
  color: var(--primary-text);
}

/* ==================== 节点详情 ==================== */

.node-detail {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.detail-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
}

.detail-row:last-of-type {
  border-bottom: none;
}

.detail-label {
  font-size: 0.95rem;
  color: var(--text-secondary);
  flex-shrink: 0;
}

.detail-value {
  font-size: 1rem;
  font-weight: 600;
  text-align: right;
  word-break: break-all;
}

.detail-value.mono {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

.copy-btn {
  width: 100%;
  min-height: 52px;
  margin-top: 8px;
  font-size: 1rem;
  font-weight: 700;
}

/* ==================== 按钮与加载 ==================== */

.primary-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 24px;
  border-radius: var(--radius-sm);
  background-color: var(--primary);
  color: var(--primary-text);
  font-weight: 700;
  font-size: 1rem;
  box-shadow: var(--shadow);
  transition: background-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.primary-btn:active {
  transform: scale(0.97);
  box-shadow: none;
}

.primary-btn:hover {
  background-color: var(--primary-hover);
}

.loading-view,
.error-view {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 60dvh;
  text-align: center;
  padding: 24px;
}

.spinner {
  width: 48px;
  height: 48px;
  border: 4px solid var(--surface-2);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-bottom: 16px;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.loading-view p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.error-icon {
  font-size: 3rem;
  margin-bottom: 12px;
}

.error-view h2 {
  font-size: 1.25rem;
  margin-bottom: 8px;
}

.error-view p {
  color: var(--text-secondary);
  margin-bottom: 20px;
  max-width: 320px;
  word-break: break-word;
}

.empty-tip {
  text-align: center;
  color: var(--text-secondary);
  padding: 32px 16px;
  font-size: 0.95rem;
}

/* ==================== Toast 提示 ==================== */

.toast {
  position: fixed;
  left: 50%;
  bottom: calc(24px + var(--main-safe-bottom));
  transform: translateX(-50%) translateY(20px);
  padding: 12px 24px;
  border-radius: 999px;
  background-color: var(--text);
  color: var(--bg);
  font-size: 0.95rem;
  font-weight: 600;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition), transform var(--transition);
  z-index: 200;
}

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

/* ==================== 响应式与桌面适配 ==================== */

@media (min-width: 640px) {
  .app-header {
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  }

  .card:hover {
    transform: translateY(-2px);
  }
}

/* 减少动画偏好 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}