/*
 * 文件转换页面样式表 - convert/index.html
 * 多标签页、上传拖拽、进度条、深色主题
 * 与站点共享CSS变量保持一致（见../css/style.css）
 */

/* ============================================================
   CONTAINER
   ============================================================ */
.convert-page {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 1rem 4rem;
}

.convert-page h1 {
  font-size: 2rem;
  font-weight: 800;
  text-align: center;
  margin-bottom: 0.5rem;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.convert-page .subtitle {
  text-align: center;
  color: var(--text-secondary);
  font-size: 1rem;
  margin-bottom: 2rem;
}

/* ============================================================
   TAB NAVIGATION
   ============================================================ */
.convert-tabs {
  display: flex;
  gap: 0;
  margin-bottom: 0;
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
  overflow-y: hidden;
  white-space: nowrap;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
  position: sticky;
  top: 64px;
  z-index: 50;
  background: var(--bg-primary);
}

.convert-tabs::-webkit-scrollbar {
  height: 4px;
}
.convert-tabs::-webkit-scrollbar-track {
  background: transparent;
}
.convert-tabs::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 4px;
}

.convert-tab-btn {
  flex: 0 0 auto;
  padding: 0.85rem 1.5rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
  background: transparent;
  border: none;
  border-bottom: 3px solid transparent;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
  position: relative;
  white-space: nowrap;
}

.convert-tab-btn:hover {
  color: var(--text-primary);
  background: rgba(0, 212, 255, 0.04);
}

.convert-tab-btn.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.convert-tab-btn .tab-icon {
  margin-right: 6px;
}

/* ============================================================
   TAB PANELS
   ============================================================ */
.convert-panels {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-top: none;
  border-radius: 0 0 16px 16px;
  padding: 2rem;
}

.convert-panel {
  display: none;
}

.convert-panel.active {
  display: block;
  animation: panelFadeIn 0.3s ease;
}

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

.panel-header {
  margin-bottom: 1.5rem;
}

.panel-header h2 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.3rem;
}

.panel-header p {
  font-size: 0.88rem;
  color: var(--text-secondary);
}

/* ============================================================
   UPLOAD DROP ZONE
   ============================================================ */
.upload-zone {
  position: relative;
  border: 2px dashed var(--border-light);
  border-radius: 16px;
  padding: 3rem 2rem;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.3s, background 0.3s, box-shadow 0.3s;
  background: rgba(26, 34, 53, 0.5);
}

.upload-zone:hover {
  border-color: var(--accent);
  background: rgba(0, 212, 255, 0.03);
}

.upload-zone.drag-over,
.upload-zone.dragover {
  border-color: var(--accent);
  background: rgba(0, 212, 255, 0.06);
  box-shadow: 0 0 25px rgba(0, 212, 255, 0.15), inset 0 0 25px rgba(0, 212, 255, 0.05);
  transform: scale(1.005);
}

.upload-zone .upload-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  display: block;
  color: var(--text-muted);
  transition: color 0.3s, transform 0.3s;
}

.upload-zone.drag-over .upload-icon,
.upload-zone.dragover .upload-icon {
  color: var(--accent);
  transform: translateY(-4px);
}

.upload-zone .upload-label {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.4rem;
}

.upload-zone .upload-hint {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.upload-zone .upload-formats {
  display: inline-flex;
  gap: 6px;
  flex-wrap: wrap;
  justify-content: center;
}

.upload-zone .format-badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 20px;
  font-size: 0.72rem;
  font-weight: 600;
  background: rgba(0, 212, 255, 0.1);
  color: var(--accent);
  border: 1px solid rgba(0, 212, 255, 0.15);
}

.upload-zone .format-badge.more {
  background: rgba(124, 58, 237, 0.1);
  color: var(--accent2);
  border-color: rgba(124, 58, 237, 0.15);
}

/* Hidden file input */
.upload-zone input[type="file"] {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
  z-index: 2;
}

/* ============================================================
   FILE LIST
   ============================================================ */
.file-list {
  margin-top: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.file-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: 10px;
  transition: border-color 0.2s, background 0.2s;
}

.file-item:hover {
  border-color: var(--border-light);
  background: var(--card-hover);
}

.file-item .file-icon {
  font-size: 1.5rem;
  flex-shrink: 0;
  width: 36px;
  text-align: center;
}

.file-item .file-info {
  flex: 1;
  min-width: 0;
}

.file-item .file-name {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.file-item .file-size {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.file-item .file-status {
  font-size: 0.78rem;
  font-weight: 500;
  flex-shrink: 0;
}

.file-item .file-status.ready {
  color: var(--accent3);
}

.file-item .file-status.converting {
  color: var(--accent);
}

.file-item .file-status.done {
  color: var(--accent3);
}

.file-item .file-status.error {
  color: #ef4444;
}

.file-item .file-remove {
  flex-shrink: 0;
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 1.1rem;
  padding: 4px;
  border-radius: 4px;
  transition: color 0.2s, background 0.2s;
  line-height: 1;
}

.file-item .file-remove:hover {
  color: #ef4444;
  background: rgba(239, 68, 68, 0.1);
}

/* ============================================================
   PROGRESS BARS
   ============================================================ */
.progress-bar {
  width: 100%;
  height: 6px;
  background: var(--border);
  border-radius: 10px;
  overflow: hidden;
  margin-top: 0.4rem;
}

.progress-bar .progress-fill {
  height: 100%;
  width: 0%;
  border-radius: 10px;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  transition: width 0.4s ease;
  position: relative;
}

.progress-bar .progress-fill::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.2),
    transparent
  );
  animation: progressShine 1.5s infinite;
}

@keyframes progressShine {
  0% {
    transform: translateX(-100%);
  }
  100% {
    transform: translateX(100%);
  }
}

/* Indeterminate (animated) progress bar */
.progress-bar.indeterminate .progress-fill {
  width: 30%;
  animation: progressIndeterminate 1.5s infinite ease-in-out;
}

@keyframes progressIndeterminate {
  0% {
    transform: translateX(-100%);
  }
  100% {
    transform: translateX(400%);
  }
}

/* ============================================================
   CONVERT / DOWNLOAD BUTTONS
   ============================================================ */
.convert-actions {
  display: flex;
  gap: 1rem;
  margin-top: 1.5rem;
  flex-wrap: wrap;
}

.btn-convert {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 12px 32px;
  border-radius: 10px;
  font-weight: 700;
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
  transition: all 0.2s;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #fff;
}

.btn-convert:hover {
  box-shadow: 0 4px 20px rgba(0, 212, 255, 0.3);
  transform: translateY(-2px);
}

.btn-convert:active {
  transform: translateY(0);
}

.btn-convert:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.btn-convert .btn-icon {
  font-size: 1.1rem;
}

.btn-download {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 12px 32px;
  border-radius: 10px;
  font-weight: 700;
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
  transition: all 0.2s;
  background: linear-gradient(135deg, var(--accent3), #059669);
  color: #fff;
}

.btn-download:hover {
  box-shadow: 0 4px 20px rgba(16, 185, 129, 0.3);
  transform: translateY(-2px);
}

.btn-download:active {
  transform: translateY(0);
}

.btn-download:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.btn-clear {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 12px 24px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.9rem;
  border: 1px solid var(--border);
  cursor: pointer;
  transition: all 0.2s;
  background: transparent;
  color: var(--text-secondary);
}

.btn-clear:hover {
  border-color: var(--text-muted);
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.03);
}

/* ============================================================
   TOOLBAR (additional controls area inside panel)
   ============================================================ */
.panel-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

.panel-toolbar .file-count {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ============================================================
   QUALITY / OPTION SELECTORS
   ============================================================ */
.convert-options {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  align-items: center;
  margin: 1rem 0;
}

.convert-options label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.convert-options select {
  padding: 6px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 0.85rem;
  cursor: pointer;
  transition: border-color 0.2s;
}

.convert-options select:hover,
.convert-options select:focus {
  border-color: var(--accent);
  outline: none;
}

/* ============================================================
   RESULT SECTION (after conversion)
   ============================================================ */
.convert-result {
  margin-top: 1.5rem;
  padding: 1.5rem;
  background: rgba(16, 185, 129, 0.06);
  border: 1px solid rgba(16, 185, 129, 0.2);
  border-radius: 12px;
  display: none;
}

.convert-result.visible {
  display: block;
  animation: panelFadeIn 0.3s ease;
}

.convert-result .result-icon {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
}

.convert-result .result-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent3);
  margin-bottom: 0.3rem;
}

.convert-result .result-details {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

/* ============================================================
   STATUS MESSAGES
   ============================================================ */
.status-msg {
  padding: 0.75rem 1rem;
  border-radius: 10px;
  font-size: 0.85rem;
  font-weight: 500;
  margin-top: 1rem;
  display: none;
}

.status-msg.visible {
  display: block;
}

.status-msg.info {
  background: rgba(0, 212, 255, 0.08);
  border: 1px solid rgba(0, 212, 255, 0.2);
  color: var(--accent);
}

.status-msg.success {
  background: rgba(16, 185, 129, 0.08);
  border: 1px solid rgba(16, 185, 129, 0.2);
  color: var(--accent3);
}

.status-msg.error {
  background: rgba(239, 68, 68, 0.08);
  border: 1px solid rgba(239, 68, 68, 0.2);
  color: #ef4444;
}

/* ============================================================
   EMPTY STATE
   ============================================================ */
.empty-state {
  text-align: center;
  padding: 2rem;
  color: var(--text-muted);
}

.empty-state .empty-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  opacity: 0.4;
}

.empty-state .empty-text {
  font-size: 0.95rem;
}

/* ============================================================
   RESPONSIVE - Tablet & Below
   ============================================================ */
@media (max-width: 768px) {
  .convert-page {
    padding: 1.5rem 0.75rem 3rem;
  }

  .convert-page h1 {
    font-size: 1.5rem;
  }

  .convert-tab-btn {
    padding: 0.7rem 1rem;
    font-size: 0.82rem;
  }

  .convert-tab-btn .tab-icon {
    margin-right: 4px;
  }

  .convert-panels {
    padding: 1.25rem;
    border-radius: 0 0 12px 12px;
  }

  .upload-zone {
    padding: 2rem 1.25rem;
  }

  .upload-zone .upload-icon {
    font-size: 2.2rem;
  }

  .upload-zone .upload-label {
    font-size: 0.95rem;
  }

  .panel-header h2 {
    font-size: 1.15rem;
  }

  .convert-actions {
    flex-direction: column;
  }

  .btn-convert,
  .btn-download,
  .btn-clear {
    width: 100%;
    justify-content: center;
  }

  .convert-options {
    flex-direction: column;
    align-items: stretch;
    gap: 0.75rem;
  }

  .convert-options label {
    flex-wrap: wrap;
  }

  .convert-options select {
    width: 100%;
  }

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

  .file-item {
    padding: 0.6rem 0.75rem;
    flex-wrap: wrap;
  }

  .file-item .file-status {
    width: auto;
  }

  .convert-panels {
    border-radius: 0 0 12px 12px;
  }
}

/* ============================================================
   RESPONSIVE - Small Phone
   ============================================================ */
@media (max-width: 480px) {
  .convert-page {
    padding: 1rem 0.5rem 2rem;
  }

  .convert-page h1 {
    font-size: 1.25rem;
  }

  .convert-page .subtitle {
    font-size: 0.85rem;
  }

  .convert-tab-btn {
    padding: 0.6rem 0.75rem;
    font-size: 0.75rem;
  }

  .convert-tab-btn .tab-icon {
    margin-right: 3px;
  }

  .convert-panels {
    padding: 1rem;
    border-radius: 0 0 10px 10px;
  }

  .upload-zone {
    padding: 1.5rem 1rem;
  }

  .upload-zone .upload-icon {
    font-size: 1.8rem;
  }

  .upload-zone .upload-label {
    font-size: 0.88rem;
  }

  .upload-zone .upload-hint {
    font-size: 0.75rem;
  }

  .format-badge {
    font-size: 0.65rem;
    padding: 1px 8px;
  }

  .panel-header h2 {
    font-size: 1rem;
  }

  .file-item .file-name {
    font-size: 0.82rem;
  }

  .file-item .file-size {
    font-size: 0.72rem;
  }

  .btn-convert,
  .btn-download,
  .btn-clear {
    padding: 10px 20px;
    font-size: 0.85rem;
  }
}