/* ========== 全局样式 ========== */
* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --danger: #dc2626;
  --danger-hover: #b91c1c;
  --bg: #f8fafc;
  --card-bg: #ffffff;
  --border: #e2e8f0;
  --text: #1e293b;
  --text-secondary: #64748b;
  --radius: 12px;
  --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.1);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
}

/* ========== 导航栏 ========== */
.navbar {
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow);
}
.nav-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}
.nav-brand {
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
  text-decoration: none;
  letter-spacing: -0.5px;
}
.nav-right {
  display: flex;
  align-items: center;
  gap: 12px;
}
.nav-user {
  font-size: 14px;
  color: var(--text-secondary);
}

/* ========== 按钮 ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.2s;
  white-space: nowrap;
}
.btn-primary {
  background: var(--primary);
  color: white;
}
.btn-primary:hover { background: var(--primary-hover); }
.btn-outline {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-outline:hover { background: #f1f5f9; }
.btn-danger {
  background: transparent;
  color: var(--danger);
  border: 1px solid var(--danger);
}
.btn-danger:hover { background: #fef2f2; }
.btn-sm { padding: 6px 14px; font-size: 13px; }
.btn-full { width: 100%; }
.btn:disabled { opacity: 0.6; cursor: not-allowed; }

/* ========== 认证页面 ========== */
.auth-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}
.auth-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 40px;
  width: 100%;
  max-width: 420px;
  box-shadow: var(--shadow-lg);
}
.auth-header {
  text-align: center;
  margin-bottom: 28px;
}
.auth-header .logo {
  font-size: 48px;
  margin-bottom: 12px;
}
.auth-header h1 {
  font-size: 24px;
  margin-bottom: 6px;
}
.auth-header p {
  color: var(--text-secondary);
  font-size: 14px;
}
.auth-footer {
  text-align: center;
  margin-top: 20px;
  font-size: 14px;
  color: var(--text-secondary);
}
.auth-footer a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
}

/* ========== 表单 ========== */
.auth-form, .upload-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.form-group label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
}
.form-group small {
  font-size: 12px;
  color: var(--text-secondary);
}
.form-group input[type="text"],
.form-group input[type="password"] {
  padding: 10px 14px;
  border: 2px solid var(--border);
  border-radius: 8px;
  font-size: 15px;
  transition: border-color 0.2s;
  background: #f8fafc;
  outline: none;
}
.form-group input:focus {
  border-color: var(--primary);
  background: white;
}

/* ========== 提示 ========== */
.alert {
  padding: 12px 16px;
  border-radius: 8px;
  margin-bottom: 16px;
  font-size: 14px;
  font-weight: 500;
}
.alert-error {
  background: #fef2f2;
  color: var(--danger);
  border: 1px solid #fecaca;
}
.alert-success {
  background: #f0fdf4;
  color: #16a34a;
  border: 1px solid #bbf7d0;
}

/* ========== 主容器 ========== */
.main-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 32px 24px;
}
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 28px;
}
.page-header h2 {
  font-size: 24px;
  font-weight: 700;
}

/* ========== 仪表盘 ========== */
.empty-state {
  text-align: center;
  padding: 80px 20px;
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.empty-icon {
  font-size: 64px;
  margin-bottom: 16px;
}
.empty-state h3 {
  font-size: 20px;
  margin-bottom: 8px;
}
.empty-state p {
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 16px;
}
.video-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: box-shadow 0.2s;
}
.video-card:hover {
  box-shadow: var(--shadow-lg);
}
.video-card-body {
  padding: 20px;
}
.video-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.video-meta {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 16px;
}
.video-card-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

/* ========== 上传页面 ========== */
.upload-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow);
  max-width: 640px;
}
.file-upload-area {
  border: 2px dashed var(--border);
  border-radius: 12px;
  min-height: 160px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s;
  position: relative;
}
.file-upload-area:hover,
.file-upload-area.dragover {
  border-color: var(--primary);
  background: #eef2ff;
}
.file-upload-content {
  text-align: center;
  padding: 30px;
}
.upload-icon {
  font-size: 40px;
  margin-bottom: 8px;
}
.file-upload-content p {
  font-size: 15px;
  font-weight: 500;
}
.file-upload-content small {
  color: var(--text-secondary);
  font-size: 12px;
}
.file-selected {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  width: 100%;
}
.file-name {
  font-weight: 500;
  font-size: 14px;
  color: var(--primary);
  word-break: break-all;
  flex: 1;
  margin-right: 12px;
}

/* 上传成功 */
.upload-success {
  padding: 24px;
  line-height: 2;
}
.share-link-box {
  margin: 16px 0;
}
.share-link-box label {
  font-weight: 600;
  font-size: 14px;
  display: block;
  margin-bottom: 6px;
}
.copy-row {
  display: flex;
  gap: 8px;
}
.copy-row input {
  flex: 1;
  padding: 10px 14px;
  border: 2px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  background: #f8fafc;
}
.share-hint {
  color: var(--text-secondary);
  font-size: 13px;
  margin-bottom: 12px;
}

/* ========== 播放器 ========== */
.player-container {
  max-width: 960px;
  margin: 0 auto;
}
.player-header {
  margin-bottom: 16px;
}
.player-header h2 {
  font-size: 22px;
  margin-bottom: 6px;
}
.player-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  color: var(--text-secondary);
}
.badge {
  padding: 2px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
}
.badge-owner {
  background: #eef2ff;
  color: var(--primary);
}
.badge-locked {
  background: #fef3c7;
  color: #92400e;
}

.video-wrapper {
  position: relative;
  background: #000;
  border-radius: 12px;
  overflow: hidden;
  margin-bottom: 16px;
  user-select: none;
  cursor: pointer;
  aspect-ratio: 16 / 9;
  max-height: 70vh;
}

/* Shadow DOM 宿主：承载藏在 shadow root 里的 video，撑满播放器 */
#videoHost {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  z-index: 1;
}

/* 关键：透明遮罩覆盖video，阻止QQ/UC等浏览器识别video元素注入下载按钮 */
.video-click-shield {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 60px;
  z-index: 10;
  background: transparent;
  cursor: pointer;
}

.watermark {
  position: absolute;
  top: 12px;
  right: 16px;
  color: rgba(255,255,255,0.4);
  font-size: 12px;
  pointer-events: none;
  z-index: 5;
  white-space: nowrap;
  text-shadow: 0 1px 2px rgba(0,0,0,0.5);
}

/* 中央大播放按钮 */
.center-play-btn {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 72px; height: 72px;
  background: rgba(79, 70, 229, 0.85);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  color: white;
  z-index: 20;
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.3s;
  pointer-events: none;
  box-shadow: 0 4px 15px rgba(0,0,0,0.3);
}
.center-play-btn.show {
  opacity: 1;
  pointer-events: auto;
}
.center-play-btn:hover {
  background: rgba(67, 56, 202, 0.95);
  transform: translate(-50%, -50%) scale(1.1);
}

/* loading */
.loading-spinner {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: center;
}
.spinner {
  width: 40px; height: 40px;
  border: 3px solid rgba(255,255,255,0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ===== 自定义底部控制栏 ===== */
.custom-controls {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  background: linear-gradient(transparent, rgba(0,0,0,0.75));
  padding: 30px 12px 10px;
  z-index: 15;
  opacity: 0;
  transition: opacity 0.3s;
}
.custom-controls.visible {
  opacity: 1;
}

/* 进度条 */
.progress-bar-wrap {
  padding: 0 4px;
  margin-bottom: 8px;
  cursor: pointer;
}
.progress-bar-track {
  width: 100%; height: 5px;
  background: rgba(255,255,255,0.25);
  border-radius: 3px;
  position: relative;
  transition: height 0.15s;
}
.progress-bar-wrap:hover .progress-bar-track {
  height: 8px;
}
.progress-bar-fill {
  height: 100%;
  background: var(--primary);
  border-radius: 3px;
  width: 0%;
  position: relative;
}
.progress-bar-thumb {
  position: absolute;
  top: 50%;
  width: 14px; height: 14px;
  background: var(--primary);
  border: 2px solid white;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  left: 0%;
  opacity: 0;
  transition: opacity 0.15s;
  box-shadow: 0 1px 3px rgba(0,0,0,0.3);
}
.progress-bar-wrap:hover .progress-bar-thumb {
  opacity: 1;
}

/* 控件行 */
.controls-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 4px;
}
.controls-left, .controls-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

.ctrl-btn {
  background: transparent;
  border: none;
  color: white;
  font-size: 18px;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 4px;
  transition: background 0.15s;
  line-height: 1;
}
.ctrl-btn:hover {
  background: rgba(255,255,255,0.15);
}

.time-display {
  color: rgba(255,255,255,0.85);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.volume-control {
  display: flex;
  align-items: center;
  gap: 4px;
}
.volume-slider-wrap {
  width: 0;
  overflow: hidden;
  transition: width 0.2s;
}
.volume-control:hover .volume-slider-wrap {
  width: 80px;
}
.volume-slider {
  width: 80px;
  height: 4px;
  -webkit-appearance: none;
  appearance: none;
  background: rgba(255,255,255,0.3);
  border-radius: 2px;
  outline: none;
  cursor: pointer;
}
.volume-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 13px; height: 13px;
  background: white;
  border-radius: 50%;
  cursor: pointer;
}

.protect-notice {
  background: #fffbeb;
  border: 1px solid #fde68a;
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 13px;
  color: #92400e;
  text-align: center;
}

/* ========== 响应式 ========== */
@media (max-width: 768px) {
  .video-grid { grid-template-columns: 1fr; }
  .upload-card { max-width: 100%; padding: 20px; }
  .auth-card { padding: 28px 20px; }
  .page-header { flex-direction: column; gap: 12px; align-items: flex-start; }
  .nav-brand { font-size: 15px; }
  .video-card-actions { flex-direction: column; }
  .video-card-actions .btn { width: 100%; justify-content: center; }
}