/* === M3U 管理面板 - 现代化 UI 样式 === */
:root {
  --bg: #f0f2f5;
  --card-bg: #ffffff;
  --text: #1a1a2e;
  --text-secondary: #6b7280;
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --danger: #ef4444;
  --danger-hover: #dc2626;
  --success: #10b981;
  --warning: #f59e0b;
  --border: #e5e7eb;
  --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 25px rgba(0,0,0,0.1);
  --radius: 12px;
  --radius-sm: 8px;
  --transition: 0.2s ease;
}

/* 暗色模式 */
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f172a;
    --card-bg: #1e293b;
    --text: #e2e8f0;
    --text-secondary: #94a3b8;
    --primary: #818cf8;
    --primary-hover: #6366f1;
    --danger: #f87171;
    --danger-hover: #ef4444;
    --success: #34d399;
    --warning: #fbbf24;
    --border: #334155;
    --shadow: 0 1px 3px rgba(0,0,0,0.3);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.4);
  }
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  line-height: 1.6;
  transition: background var(--transition), color var(--transition);
}

/* === 导航栏 === */
.navbar {
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 100;
  transition: background var(--transition);
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
  text-decoration: none;
}

.navbar-brand svg {
  width: 28px;
  height: 28px;
}

.navbar-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
}

.navbar-nav a {
  color: var(--text-secondary);
  text-decoration: none;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  transition: all var(--transition);
}

.navbar-nav a:hover,
.navbar-nav a.active {
  color: var(--primary);
  background: rgba(79, 70, 229, 0.08);
}

/* === 主容器 === */
.main-container {
  flex: 1;
  max-width: 900px;
  width: 100%;
  margin: 0 auto;
  padding: 24px 16px;
}

/* === 卡片 === */
.card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 20px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  transition: all var(--transition);
}

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

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}

.card-header h2,
.card-header h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 8px;
}

.card-header .badge {
  background: var(--primary);
  color: #fff;
  font-size: 12px;
  padding: 2px 10px;
  border-radius: 20px;
  font-weight: 500;
}

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

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
  margin-bottom: 6px;
}

.form-input {
  width: 100%;
  padding: 10px 14px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 15px;
  background: var(--card-bg);
  color: var(--text);
  transition: all var(--transition);
  outline: none;
}

.form-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

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

.form-row {
  display: flex;
  gap: 12px;
}

.form-row .form-group {
  flex: 1;
}

/* === 按钮 === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 20px;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

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

.btn-primary:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
}

.btn-danger {
  background: var(--danger);
  color: #fff;
}

.btn-danger:hover {
  background: var(--danger-hover);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 1.5px solid var(--primary);
}

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

.btn-sm {
  padding: 6px 14px;
  font-size: 13px;
}

.btn-block {
  width: 100%;
}

/* === 消息提示 === */
.alert {
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  font-size: 14px;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 8px;
}

.alert-success {
  background: #ecfdf5;
  color: #065f46;
  border: 1px solid #a7f3d0;
}

.alert-error {
  background: #fef2f2;
  color: #991b1b;
  border: 1px solid #fecaca;
}

.alert-warning {
  background: #fffbeb;
  color: #92400e;
  border: 1px solid #fde68a;
}

.alert-info {
  background: #eff6ff;
  color: #1e40af;
  border: 1px solid #bfdbfe;
}

@media (prefers-color-scheme: dark) {
  .alert-success { background: #064e3b; color: #a7f3d0; border-color: #065f46; }
  .alert-error { background: #7f1d1d; color: #fecaca; border-color: #991b1b; }
  .alert-warning { background: #78350f; color: #fde68a; border-color: #92400e; }
  .alert-info { background: #1e3a5f; color: #bfdbfe; border-color: #1e40af; }
}

/* === 表格/列表 === */
.table-container {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
}

table th,
table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}

table th {
  font-weight: 600;
  color: var(--text-secondary);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  background: rgba(0,0,0,0.02);
}

table tr:hover td {
  background: rgba(79, 70, 229, 0.03);
}

/* === 列表项 === */
.list-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
  transition: background var(--transition);
}

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

.list-item:hover {
  background: rgba(79, 70, 229, 0.02);
  margin: 0 -24px;
  padding: 14px 24px;
  border-radius: var(--radius-sm);
}

.list-item-content {
  display: flex;
  align-items: center;
  gap: 12px;
}

.list-item-actions {
  display: flex;
  gap: 8px;
}

/* === 复制框 === */
.copy-box {
  display: flex;
  gap: 8px;
  margin-top: 8px;
}

.copy-box .form-input {
  flex: 1;
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: 13px;
  background: rgba(0,0,0,0.03);
}

/* === 页脚 === */
.footer {
  background: var(--card-bg);
  border-top: 1px solid var(--border);
  padding: 16px 24px;
  text-align: center;
  font-size: 13px;
  color: var(--text-secondary);
  transition: background var(--transition);
}

.footer a {
  color: var(--primary);
  text-decoration: none;
}

/* === 空状态 === */
.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-secondary);
}

.empty-state svg {
  width: 64px;
  height: 64px;
  margin-bottom: 16px;
  opacity: 0.4;
}

.empty-state p {
  font-size: 15px;
}

/* === 响应式 === */
@media (max-width: 768px) {
  .navbar {
    padding: 6px 10px;
    height: auto;
    min-height: auto;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
  }

  .navbar-brand {
    font-size: 15px;
    gap: 6px;
    white-space: nowrap;
    justify-content: flex-start;
  }

  .navbar-brand svg {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
  }

  .navbar-nav {
    flex-wrap: nowrap;
    gap: 2px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    -ms-overflow-style: none;
    scrollbar-width: none;
    justify-content: flex-start;
  }

  .navbar-nav::-webkit-scrollbar {
    display: none;
  }

  .navbar-nav a {
    padding: 5px 8px;
    font-size: 12px;
    white-space: nowrap;
    flex-shrink: 0;
  }

  .main-container {
    padding: 12px 8px;
  }

  .card {
    padding: 14px;
    border-radius: var(--radius-sm);
    margin-bottom: 12px;
  }

  .card-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    margin-bottom: 14px;
    padding-bottom: 12px;
  }

  .card-header h2,
  .card-header h3 {
    font-size: 16px;
  }

  .form-row {
    flex-direction: column;
    gap: 0;
  }

  .form-input {
    font-size: 16px;
    padding: 10px 12px;
  }

  .list-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    padding: 12px 0;
  }

  .list-item:hover {
    margin: 0 -14px;
    padding: 12px 14px;
  }

  .list-item-content {
    width: 100%;
    flex-wrap: wrap;
  }

  .list-item-actions {
    width: 100%;
    flex-wrap: wrap;
    gap: 6px;
  }

  .copy-box {
    flex-direction: column;
    width: 100%;
  }

  .copy-box .form-input {
    width: 100% !important;
    font-size: 12px;
  }

  table th,
  table td {
    padding: 8px 10px;
    font-size: 12px;
  }

  .btn {
    padding: 8px 14px;
    font-size: 13px;
  }

  .btn-sm {
    padding: 6px 10px;
    font-size: 12px;
  }

  .footer {
    padding: 12px 16px;
    font-size: 12px;
  }
}

@media (max-width: 480px) {
  .navbar {
    padding: 4px 8px;
  }

  .navbar-brand {
    font-size: 14px;
  }

  .navbar-brand svg {
    width: 18px;
    height: 18px;
  }

  .navbar-nav {
    gap: 1px;
  }

  .navbar-nav a {
    padding: 4px 6px;
    font-size: 11px;
  }

  .main-container {
    padding: 8px 6px;
  }

  .card {
    padding: 12px;
    margin-bottom: 10px;
  }

  .card-header h2,
  .card-header h3 {
    font-size: 15px;
  }

  .list-item {
    gap: 8px;
    padding: 10px 0;
  }

  .list-item:hover {
    margin: 0 -12px;
    padding: 10px 12px;
  }

  .list-item-actions {
    flex-direction: column;
    gap: 6px;
  }

  .list-item-actions .btn {
    width: 100%;
    text-align: center;
  }

  .copy-box {
    gap: 6px;
  }

  .copy-box .form-input {
    font-size: 11px;
    padding: 8px 10px;
  }

  .btn {
    padding: 8px 12px;
    font-size: 13px;
    width: 100%;
    justify-content: center;
  }

  .form-group label {
    font-size: 13px;
  }

  .alert {
    font-size: 13px;
    padding: 10px 12px;
  }
}

/* === 动画 === */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.card {
  animation: fadeIn 0.3s ease;
}

/* === 状态标签 === */
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 500;
}

.status-active {
  background: #ecfdf5;
  color: #065f46;
}

.status-expired {
  background: #fef2f2;
  color: #991b1b;
}

@media (prefers-color-scheme: dark) {
  .status-active { background: #064e3b; color: #a7f3d0; }
  .status-expired { background: #7f1d1d; color: #fecaca; }
}