/* ============================================
   图床管理 - 现代化样式
   ============================================ */

/* --- CSS 变量 --- */
:root {
  /* 浅色主题 */
  --bg-primary: #f0f2f5;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f8f9fa;
  --bg-hover: #e9ecef;
  --text-primary: #1a1a2e;
  --text-secondary: #6c757d;
  --text-tertiary: #adb5bd;
  --accent: #6366f1;
  --accent-hover: #4f46e5;
  --accent-light: rgba(99, 102, 241, 0.1);
  --success: #10b981;
  --success-light: rgba(16, 185, 129, 0.1);
  --danger: #ef4444;
  --danger-hover: #dc2626;
  --danger-light: rgba(239, 68, 68, 0.1);
  --warning: #f59e0b;
  --border: #e5e7eb;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --transition: 0.2s ease;
  --glass-bg: rgba(255, 255, 255, 0.8);
  --glass-border: rgba(255, 255, 255, 0.3);
}

[data-theme="dark"] {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #162032;
  --bg-hover: #334155;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-tertiary: #64748b;
  --accent: #818cf8;
  --accent-hover: #6366f1;
  --accent-light: rgba(129, 140, 248, 0.15);
  --success: #34d399;
  --success-light: rgba(52, 211, 153, 0.15);
  --danger: #f87171;
  --danger-hover: #ef4444;
  --danger-light: rgba(248, 113, 113, 0.15);
  --warning: #fbbf24;
  --border: #334155;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5);
  --glass-bg: rgba(30, 41, 59, 0.8);
  --glass-border: rgba(51, 65, 85, 0.5);
}

/* --- 重置与基础 --- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

/* --- 应用容器 --- */
.app {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0;
}

/* --- 导航栏 --- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
  padding: 0 24px;
}

.nav-content {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-icon {
  font-size: 28px;
  filter: drop-shadow(0 2px 4px rgba(99, 102, 241, 0.3));
}

.brand-text {
  font-size: 20px;
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent), #a855f7);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* --- 按钮 --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}

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

.btn-primary {
  background: linear-gradient(135deg, var(--accent), #7c3aed);
  color: white;
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: var(--bg-hover);
}

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

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

.btn-icon {
  width: 40px;
  height: 40px;
  padding: 0;
  background: transparent;
  color: var(--text-secondary);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  transition: all var(--transition);
}

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

.btn-icon svg {
  width: 20px;
  height: 20px;
}

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

.btn-copy {
  background: var(--accent-light);
  color: var(--accent);
  border: 1px solid var(--accent);
}

.btn-copy:hover {
  background: var(--accent);
  color: white;
}

/* --- 上传区域 --- */
.upload-section {
  padding: 24px;
}

.upload-card {
  background: var(--bg-secondary);
  border: 2px dashed var(--border);
  border-radius: var(--radius-lg);
  padding: 48px 24px;
  text-align: center;
  cursor: pointer;
  transition: all 0.3s ease;
}

.upload-card:hover {
  border-color: var(--accent);
  background: var(--accent-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.upload-card.dragover {
  border-color: var(--accent);
  background: var(--accent-light);
  transform: scale(1.02);
  box-shadow: var(--shadow-xl);
}

.upload-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 16px;
  color: var(--accent);
}

.upload-icon svg {
  width: 100%;
  height: 100%;
}

.upload-card h3 {
  font-size: 18px;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.upload-hint {
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 4px;
}

.upload-formats {
  color: var(--text-tertiary);
  font-size: 12px;
  margin-bottom: 20px;
}

/* --- 上传进度 --- */
.upload-progress {
  margin-top: 16px;
  padding: 16px;
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
}

.progress-bar-container {
  height: 6px;
  background: var(--bg-tertiary);
  border-radius: 3px;
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), #a855f7);
  border-radius: 3px;
  transition: width 0.3s ease;
  width: 0%;
}

.progress-text {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  color: var(--text-secondary);
}

/* --- 工具栏 --- */
.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  gap: 16px;
  flex-wrap: wrap;
}

.toolbar-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.image-count {
  font-size: 14px;
  color: var(--text-secondary);
  padding: 6px 12px;
  background: var(--bg-secondary);
  border-radius: 20px;
  border: 1px solid var(--border);
}

.toolbar-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.search-box {
  position: relative;
  display: flex;
  align-items: center;
}

.search-icon {
  position: absolute;
  left: 12px;
  width: 16px;
  height: 16px;
  color: var(--text-tertiary);
  pointer-events: none;
}

.search-box input {
  padding: 8px 16px 8px 36px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-size: 14px;
  width: 240px;
  transition: all var(--transition);
}

.search-box input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-light);
}

.sort-select {
  padding: 8px 32px 8px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-size: 14px;
  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 24 24' fill='none' stroke='%236c757d' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
}

.sort-select:focus {
  outline: none;
  border-color: var(--accent);
}

/* --- 图片网格 --- */
.gallery-section {
  padding: 0 24px 24px;
  position: relative;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 20px;
  min-height: 100px;
}

/* --- 图片卡片 --- */
.image-card {
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
  cursor: pointer;
  position: relative;
  border: 1px solid var(--border);
}

.image-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent);
}

.image-card .card-image {
  position: relative;
  width: 100%;
  aspect-ratio: 1;
  overflow: hidden;
  background: var(--bg-tertiary);
}

.image-card .card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.image-card:hover .card-image img {
  transform: scale(1.05);
}

.card-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.6) 0%, transparent 50%);
  opacity: 0;
  transition: opacity 0.3s ease;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding: 12px;
  gap: 8px;
}

.image-card:hover .card-overlay {
  opacity: 1;
}

.card-overlay .btn {
  padding: 6px 12px;
  font-size: 12px;
  backdrop-filter: blur(8px);
}

.card-size-badge {
  position: absolute;
  top: 8px;
  right: 8px;
  background: rgba(0,0,0,0.6);
  color: white;
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 11px;
  backdrop-filter: blur(4px);
}

/* --- 空状态 --- */
.empty-state {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px 20px;
  color: var(--text-tertiary);
}

.empty-state svg {
  width: 80px;
  height: 80px;
  margin-bottom: 16px;
  opacity: 0.5;
}

.empty-state p {
  font-size: 16px;
  margin-bottom: 4px;
}

.empty-hint {
  font-size: 14px !important;
}

/* --- 加载遮罩 --- */
.loading-overlay {
  position: absolute;
  inset: 0;
  background: var(--glass-bg);
  backdrop-filter: blur(8px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 10;
  border-radius: var(--radius-md);
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.loading-overlay p {
  margin-top: 12px;
  color: var(--text-secondary);
  font-size: 14px;
}

/* --- 分页 --- */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 20px 0;
}

.page-info {
  font-size: 14px;
  color: var(--text-secondary);
}

/* --- 模态框 --- */
.modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal.active {
  display: flex;
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
}

.modal-content {
  position: relative;
  background: var(--bg-secondary);
  border-radius: var(--radius-xl);
  max-width: 700px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-xl);
  animation: modalIn 0.3s ease;
  border: 1px solid var(--border);
}

@keyframes modalIn {
  from {
    opacity: 0;
    transform: scale(0.95) translateY(10px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 36px;
  height: 36px;
  border: none;
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  border-radius: 50%;
  font-size: 20px;
  cursor: pointer;
  z-index: 10;
  transition: all var(--transition);
}

.modal-close:hover {
  background: var(--danger-light);
  color: var(--danger);
}

.modal-body {
  padding: 24px 24px 0;
}

.modal-body img {
  width: 100%;
  max-height: 400px;
  object-fit: contain;
  border-radius: var(--radius-md);
  background: var(--bg-tertiary);
}

.modal-info {
  padding: 20px 24px;
}

.info-row {
  margin-bottom: 16px;
}

.info-row:last-child {
  margin-bottom: 0;
}

.info-row label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 6px;
}

.link-input-group {
  display: flex;
  gap: 8px;
}

.link-input-group input {
  flex: 1;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-tertiary);
  color: var(--text-primary);
  font-size: 13px;
  font-family: 'SF Mono', 'Fira Code', monospace;
}

.link-input-group input:focus {
  outline: none;
  border-color: var(--accent);
}

.modal-actions {
  padding: 16px 24px 24px;
  display: flex;
  gap: 12px;
  justify-content: flex-end;
}

/* --- Toast 通知 --- */
.toast-container {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: center;
}

.toast {
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  color: white;
  box-shadow: var(--shadow-lg);
  animation: toastIn 0.3s ease, toastOut 0.3s ease 2.7s forwards;
  backdrop-filter: blur(10px);
}

.toast.success {
  background: var(--success);
}

.toast.error {
  background: var(--danger);
}

.toast.info {
  background: var(--accent);
}

@keyframes toastIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes toastOut {
  to {
    opacity: 0;
    transform: translateY(-10px);
  }
}

/* --- 主题切换动画 --- */
.sun-icon, .moon-icon {
  position: absolute;
  transition: all 0.3s ease;
}

[data-theme="light"] .sun-icon {
  opacity: 0;
  transform: rotate(90deg) scale(0);
}

[data-theme="light"] .moon-icon {
  opacity: 1;
  transform: rotate(0) scale(1);
}

[data-theme="dark"] .sun-icon {
  opacity: 1;
  transform: rotate(0) scale(1);
}

[data-theme="dark"] .moon-icon {
  opacity: 0;
  transform: rotate(-90deg) scale(0);
}

.btn-icon {
  position: relative;
  width: 40px;
  height: 40px;
}

/* --- 响应式设计 --- */
@media (max-width: 768px) {
  .navbar {
    padding: 0 16px;
  }

  .upload-section,
  .toolbar,
  .gallery-section {
    padding-left: 16px;
    padding-right: 16px;
  }

  .toolbar {
    flex-direction: column;
    align-items: stretch;
  }

  .toolbar-right {
    flex-direction: column;
  }

  .search-box input {
    width: 100%;
  }

  .gallery-grid {
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 12px;
  }

  .modal-content {
    max-height: 95vh;
    border-radius: var(--radius-md);
  }

  .modal-body {
    padding: 16px 16px 0;
  }

  .modal-info {
    padding: 16px;
  }

  .modal-actions {
    padding: 12px 16px 16px;
    flex-direction: column;
  }

  .modal-actions .btn {
    width: 100%;
  }
}

@media (max-width: 480px) {
  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
  }

  .upload-card {
    padding: 32px 16px;
  }

  .brand-text {
    font-size: 16px;
  }
}

/* --- 滚动条美化 --- */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-tertiary);
}

::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-tertiary);
}

/* --- 选中文字 --- */
::selection {
  background: var(--accent);
  color: white;
}