.epub-tool-wrapper { --p-bg: #ffffff; --p-border: #e2e8f0; --p-primary: #8b5cf6; --p-text: #0f172a; width: 100%; max-width: 1000px; margin: 0 auto; background: var(--p-bg); border-radius: 24px; padding: 32px; border: 1px solid var(--p-border); box-shadow: 0 10px 25px -5px rgba(0,0,0,0.05); transition: 0.3s; }
.epub-header-main { font-size: 1.5rem; font-weight: 600; color: var(--p-text); margin-bottom: 8px; display: flex; align-items: center; justify-content: center; gap: 12px; }
.epub-badge { background: #ede9fe; color: #6d28d9; padding: 4px 12px; border-radius: 30px; font-size: 0.8rem; font-weight: 500; }
.epub-subtitle { color: #64748b; font-size: 0.95rem; padding-bottom: 16px; border-bottom: 1px solid var(--p-border); margin-bottom: 24px; text-align: center; }

.epub-layout { display: grid; grid-template-columns: 350px 1fr; gap: 24px; align-items: start; }
@media(max-width: 850px) { .epub-layout { grid-template-columns: 1fr; } }

.epub-panel { background: #f8fafc; border: 1px solid var(--p-border); border-radius: 16px; padding: 20px; transition: 0.3s; display: flex; flex-direction: column; }
.epub-panel-title { font-weight: 600; color: var(--p-text); display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; padding-bottom: 12px; border-bottom: 1px solid var(--p-border); }

.epub-upload-area { position: relative; border: 2px dashed #cbd5e1; border-radius: 12px; background: #ffffff; padding: 32px 16px; text-align: center; cursor: pointer; transition: 0.2s; margin-bottom: 24px; display: flex; flex-direction: column; align-items: center; justify-content: center; }
.epub-upload-area:hover, .epub-upload-area.dragover { border-color: var(--p-primary); background: #f5f3ff; }
.epub-upload-area input[type="file"] { position: absolute; inset: 0; opacity: 0; cursor: pointer; width: 100%; height: 100%; }
.epub-upload-text { font-size: 1rem; color: #475569; font-weight: 600; line-height: 1.5; pointer-events: none; word-break: break-all; }

.epub-options-group { margin-bottom: 24px; }
.epub-options-label { font-size: 0.95rem; font-weight: 600; color: #475569; margin-bottom: 10px; display: flex; justify-content: space-between; }
.epub-slider { width: 100%; accent-color: var(--p-primary); }

.epub-btn-primary { width: 100%; background: var(--p-primary); color: white; border: none; padding: 14px; border-radius: 12px; font-weight: bold; font-size: 1.05rem; cursor: pointer; transition: 0.2s; box-shadow: 0 4px 12px rgba(139, 92, 246, 0.3); }
.epub-btn-primary:hover:not(:disabled) { transform: translateY(-2px); box-shadow: 0 6px 16px rgba(139, 92, 246, 0.4); }
.epub-btn-primary:disabled { opacity: 0.5; cursor: not-allowed; box-shadow: none; }

.epub-btn-success { width: 100%; background: #10b981; color: white; border: none; padding: 14px; border-radius: 12px; font-weight: bold; font-size: 1.05rem; cursor: pointer; transition: 0.2s; box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3); animation: epubPulse 2s infinite; }
.epub-btn-success:hover { background: #059669; }

@keyframes epubPulse { 0%, 100% { transform: scale(1); } 50% { transform: scale(1.02); } }

/* 日志框 */
.epub-log-box { flex: 1; height: 320px; overflow-y: auto; background: #0f172a; border-radius: 12px; padding: 16px; font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace; font-size: 0.85rem; color: #e2e8f0; line-height: 1.6; }
.epub-log-box div { margin-bottom: 4px; padding-bottom: 4px; border-bottom: 1px dashed rgba(255,255,255,0.1); }
.epub-log-box div:last-child { border-bottom: none; }
.epub-log-info { color: #38bdf8; }
.epub-log-warn { color: #fbbf24; }
.epub-log-succ { color: #4ade80; }
.epub-log-err { color: #f87171; }

/* 黑夜模式强力覆盖 */
[data-theme="dark"] .epub-tool-wrapper { background: #1e293b !important; border-color: #334155 !important; }
[data-theme="dark"] .epub-panel { background: #0f172a; border-color: #475569; }
[data-theme="dark"] .epub-panel-title { border-bottom-color: #475569; }
[data-theme="dark"] .epub-upload-area { background: #1e293b; border-color: #475569; }
[data-theme="dark"] .epub-upload-area:hover, [data-theme="dark"] .epub-upload-area.dragover { background: rgba(139, 92, 246, 0.1); border-color: var(--p-primary); }
[data-theme="dark"] .epub-upload-text { color: #cbd5e1; }
[data-theme="dark"] .epub-options-label { color: #cbd5e1; }
[data-theme="dark"] .epub-log-box { background: #020617; border: 1px solid #334155; }