/* ── Reset & Base ── */
#yooox-ebook-app *,#yooox-ebook-app *::before,#yooox-ebook-app *::after{box-sizing:border-box}
#yooox-ebook-app{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;font-size:14px;color:#1f2937;background:#f3f4f6;min-height:80vh;display:flex;flex-direction:column;position:relative}

/* ── Topbar ── */
.ye-topbar{display:flex;align-items:center;justify-content:space-between;padding:0 20px;height:52px;background:#fff;border-bottom:1px solid #e5e7eb;flex-shrink:0;gap:12px}
.ye-topbar__brand{display:flex;align-items:center;gap:10px;font-weight:600;font-size:15px;min-width:0}
.ye-topbar__title{color:#374151;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:280px}
.ye-topbar__actions{display:flex;gap:8px;flex-shrink:0}

/* ── Content ── */
.ye-content{display:flex;flex:1;overflow:hidden;position:relative}

/* ── Buttons ── */
.ye-btn{display:inline-flex;align-items:center;gap:4px;padding:6px 14px;border:1px solid #d1d5db;border-radius:6px;background:#fff;cursor:pointer;font-size:13px;font-family:inherit;white-space:nowrap;transition:background .12s,border-color .12s;line-height:1.4}
.ye-btn:hover{background:#f9fafb;border-color:#9ca3af}
.ye-btn--primary{background:#2563eb;border-color:#2563eb;color:#fff}
.ye-btn--primary:hover{background:#1d4ed8;border-color:#1d4ed8}
.ye-btn--secondary{background:#059669;border-color:#059669;color:#fff}
.ye-btn--secondary:hover{background:#047857;border-color:#047857}
.ye-btn--danger{background:#fff;border-color:#fca5a5;color:#dc2626}
.ye-btn--danger:hover{background:#fef2f2}
.ye-btn--ghost{border:none;background:none;padding:4px 8px;font-size:18px;color:#6b7280;line-height:1}
.ye-btn--ghost:hover{background:#f3f4f6}
.ye-btn--sm{padding:3px 9px;font-size:12px}
.ye-btn:disabled{opacity:.5;cursor:not-allowed}

/* ── Inputs ── */
.ye-input{padding:8px 11px;border:1px solid #d1d5db;border-radius:6px;font-size:14px;font-family:inherit;width:100%;outline:none;transition:border-color .12s;background:#fff;color:#1f2937;line-height:1.45}
.ye-input:focus{border-color:#2563eb;box-shadow:0 0 0 3px rgba(37,99,235,.12)}
.ye-select{padding:8px 10px;border:1px solid #d1d5db;border-radius:6px;font-size:14px;font-family:inherit;background:#fff;cursor:pointer;outline:none;color:#1f2937;line-height:1.45}
.ye-select:focus{border-color:#2563eb}
.ye-textarea{resize:vertical;min-height:80px}

/* ── Save status ── */
.ye-save-status{font-size:11px;padding:2px 8px;border-radius:12px;font-weight:500}
.ye-save-status--dirty{background:#fef3c7;color:#92400e}
.ye-save-status--saved{background:#d1fae5;color:#065f46}

/* ── Shelf ── */
.ye-shelf{flex:1;padding:24px;overflow-y:auto}
.ye-shelf__empty{text-align:center;padding:80px 20px;color:#9ca3af}
.ye-book-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:20px}
.ye-book-card{background:#fff;border-radius:10px;overflow:hidden;box-shadow:0 1px 3px rgba(0,0,0,.08);transition:box-shadow .15s;display:flex;flex-direction:column}
.ye-book-card:hover{box-shadow:0 4px 14px rgba(0,0,0,.12)}
.ye-book-card__cover{height:180px;background:linear-gradient(135deg,#667eea,#764ba2);display:flex;align-items:center;justify-content:center;font-size:48px;cursor:pointer}
.ye-book-card__info{padding:12px 14px;flex:1}
.ye-book-card__title{font-size:14px;font-weight:600;margin:0 0 6px;cursor:pointer;color:#1f2937}
.ye-book-card__title:hover{color:#2563eb}
.ye-book-card__meta{font-size:12px;color:#6b7280;margin:0 0 6px}
.ye-book-card__actions{padding:10px 14px;border-top:1px solid #f3f4f6;display:flex;gap:6px}

/* ── Editor layout ── */
.ye-editor-layout{display:flex;flex:1;overflow:hidden}
.ye-sidebar{width:256px;flex-shrink:0;background:#fff;border-right:1px solid #e5e7eb;display:flex;flex-direction:column}
.ye-sidebar__header{padding:12px 16px;border-bottom:1px solid #e5e7eb;display:flex;justify-content:space-between;align-items:center;font-weight:600;font-size:13px}
.ye-chapter-tree{flex:1;overflow-y:auto;padding:4px 0}
.ye-chapter-tree__empty{padding:16px;color:#9ca3af;font-size:13px}
.ye-chapter-item{display:flex;align-items:center;padding:8px 16px;cursor:pointer;font-size:13px;border-left:3px solid transparent;gap:6px}
.ye-chapter-item:hover{background:#f9fafb}
.ye-chapter-item--active{background:#eff6ff;border-left-color:#2563eb;color:#1d4ed8}
.ye-chapter-item__title{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.ye-chapter-item__count{font-size:11px;color:#9ca3af;flex-shrink:0}
.ye-chapter-item__del{border:none;background:none;color:#9ca3af;cursor:pointer;font-size:16px;padding:0;opacity:0;line-height:1;flex-shrink:0}
.ye-chapter-item:hover .ye-chapter-item__del{opacity:1}
.ye-chapter-children{padding-left:14px}
.ye-editor-main{flex:1;display:flex;flex-direction:column;overflow:hidden;background:#fff}
.ye-editor-header{padding:14px 28px 10px;border-bottom:1px solid #f3f4f6;display:flex;justify-content:space-between;align-items:center}
.ye-editor-chapter-title{font-size:17px;font-weight:600;margin:0;color:#1f2937}
.ye-word-count{font-size:12px;color:#9ca3af}
.ye-editor-textarea{flex:1;padding:20px 28px;border:none;resize:none;font-size:15px;line-height:1.85;font-family:inherit;outline:none;color:#1f2937;overflow-y:auto}
.ye-editor-empty{flex:1;display:flex;align-items:center;justify-content:center;color:#9ca3af}

/* ── Phase 2 Layout Canvas ── */
.ye-layout-editor{display:grid;grid-template-columns:220px minmax(0,1fr) 280px;flex:1;min-width:0;background:#eef2f7;overflow:hidden}
.ye-layout-pages,.ye-layout-inspector{background:#fff;border-color:#e5e7eb;display:flex;flex-direction:column;min-width:0;overflow:hidden}
.ye-layout-pages{border-right:1px solid #e5e7eb}
.ye-layout-inspector{border-left:1px solid #e5e7eb;padding:14px;gap:14px;overflow-y:auto}
.ye-layout-panel__hd{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:12px 14px;border-bottom:1px solid #e5e7eb;font-size:13px;font-weight:600;color:#1f2937}
.ye-layout-thumbs{flex:1;overflow-y:auto;padding:10px;display:flex;flex-direction:column;gap:8px}
.ye-layout-thumb{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:10px 11px;border:1px solid #e5e7eb;border-radius:8px;background:#fff;color:#374151;cursor:pointer;font-family:inherit;text-align:left}
.ye-layout-thumb:hover{border-color:#93c5fd;background:#eff6ff}
.ye-layout-thumb--active{border-color:#2563eb;background:#dbeafe;color:#1d4ed8}
.ye-layout-thumb small{font-size:11px;color:#64748b}
.ye-layout-thumb[draggable="true"]{cursor:grab}
.ye-layout-pages__ft{padding:10px;border-top:1px solid #e5e7eb;display:flex;gap:8px}
.ye-layout-stage{min-width:0;display:flex;flex-direction:column;overflow:hidden}
.ye-layout-toolbar{min-height:56px;padding:10px 16px;background:#fff;border-bottom:1px solid #e5e7eb;display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap}
.ye-layout-toolbar strong{display:block;font-size:14px;color:#111827;margin-bottom:2px}
.ye-layout-status{display:inline-block;font-size:11px;color:#64748b;background:#f1f5f9;border-radius:999px;padding:2px 8px}
.ye-layout-canvas-wrap{flex:1;overflow:auto;padding:28px;display:flex;align-items:flex-start;justify-content:center;background:radial-gradient(circle at top,#ffffff 0,#eef2f7 40%,#e2e8f0 100%)}
.ye-layout-canvas{position:relative;background:#fff;box-shadow:0 22px 55px rgba(15,23,42,.22);border:1px solid #cbd5e1;overflow:hidden;flex-shrink:0}
.ye-layout-canvas canvas{display:block;max-width:none;touch-action:none;cursor:default}
.ye-layout-empty{padding:14px;border:1px dashed #cbd5e1;border-radius:8px;background:#f8fafc;color:#64748b;font-size:13px;line-height:1.6}
.ye-layout-layers{display:flex;flex-direction:column;gap:8px}
.ye-layout-layers__hd{font-size:13px;font-weight:600;color:#111827}
.ye-layout-layers__list{display:flex;flex-direction:column;gap:8px}
.ye-layout-layer{border:1px solid #e5e7eb;border-radius:8px;padding:8px;background:#fff;display:flex;align-items:center;justify-content:space-between;gap:8px}
.ye-layout-layer--active{border-color:#2563eb;background:#eff6ff}
.ye-layout-layer__main{border:none;background:transparent;cursor:pointer;color:#1f2937;font-size:12px;text-align:left;flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;padding:0}
.ye-layout-layer__actions{display:flex;gap:4px;flex-shrink:0}
.ye-layout-debug{border:1px dashed #cbd5e1;border-radius:8px;background:#f8fafc;padding:10px;display:flex;flex-direction:column;gap:8px}
.ye-layout-debug__hd{display:flex;align-items:center;justify-content:space-between;gap:8px;font-size:12px;color:#475569;font-weight:600}
.ye-layout-debug__grid{display:grid;grid-template-columns:1fr auto;gap:6px 10px;font-size:12px;color:#475569}
.ye-layout-debug__grid strong{color:#0f172a;font-weight:600}
.ye-layout-welcome{margin:auto;text-align:center;color:#64748b;background:#fff;border:1px dashed #cbd5e1;border-radius:14px;padding:44px;box-shadow:0 14px 36px rgba(15,23,42,.08)}
.ye-layout-welcome h3{margin:0 0 10px;color:#111827;font-size:20px}
.ye-layout-welcome p{margin:0}

/* ── Section pages (exports/history/cover) ── */
.ye-section{flex:1;min-width:0;padding:24px;overflow-y:auto}
.ye-section-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px;flex-wrap:wrap;gap:10px}
.ye-section-header h2{margin:0;font-size:18px;font-weight:600;white-space:nowrap}
.ye-row-gap{display:flex;gap:8px;align-items:center;flex-wrap:wrap}

/* ── Table ── */
.ye-table{width:100%;border-collapse:collapse;background:#fff;border-radius:8px;overflow:hidden;box-shadow:0 1px 3px rgba(0,0,0,.08)}
.ye-table th{padding:11px 16px;text-align:left;font-size:12px;font-weight:600;color:#374151;background:#f9fafb;border-bottom:1px solid #e5e7eb}
.ye-table td{padding:11px 16px;font-size:13px;color:#374151;border-bottom:1px solid #f9fafb}
.ye-table tr:last-child td{border-bottom:none}
.ye-link{color:#2563eb;text-decoration:none}
.ye-link:hover{text-decoration:underline}

/* ── Badges ── */
.ye-badge{display:inline-block;padding:2px 8px;border-radius:12px;font-size:11px;font-weight:500;background:#e5e7eb;color:#374151}
.ye-badge--epub3{background:#dbeafe;color:#1d4ed8}
.ye-badge--amazon_package{background:#fef3c7;color:#92400e}
.ye-badge--s-queued{background:#f3f4f6;color:#6b7280}
.ye-badge--s-processing{background:#dbeafe;color:#1d4ed8}
.ye-badge--s-done{background:#d1fae5;color:#065f46}
.ye-badge--s-failed{background:#fee2e2;color:#dc2626}

/* ── Cover ── */
.ye-cover-page{display:flex;flex-direction:column;gap:18px;max-width:1320px;margin:0 auto;width:100%}
.ye-cover-page .ye-section-header{padding:0 2px;margin-bottom:2px}
.ye-cover-form{background:#fff;border:1px solid #e5e7eb;border-radius:10px;padding:20px;box-shadow:0 10px 24px rgba(15,23,42,.06);display:flex;flex-direction:column;gap:18px}
.ye-cover-toolbar{display:grid;grid-template-columns:minmax(220px,1.4fr) minmax(128px,.7fr) minmax(190px,.9fr) minmax(150px,.7fr);gap:12px;align-items:start;padding:14px;background:#f8fafc;border:1px solid #eef2f7;border-radius:8px}
.ye-cover-toolbar .ye-select,.ye-cover-toolbar .ye-btn{width:100%}
.ye-cover-toolbar .ye-btn{justify-content:center;min-height:38px}
.ye-cover-reference{display:grid;grid-template-columns:132px minmax(280px,.7fr) minmax(220px,1fr);gap:14px;padding:16px;background:#fcfcfd;border:1px solid #eef2f7;border-radius:8px;align-items:start}
.ye-cover-reference__title{font-size:13px;font-weight:600;color:#374151;padding-top:9px}
.ye-cover-reference__body{display:flex;gap:8px;flex-wrap:wrap;align-items:center;min-width:0}
.ye-cover-reference__file{max-width:none;flex:1 1 280px;background:#fff}
.ye-cover-reference__preview{grid-column:auto;display:flex;flex-direction:column;gap:8px;min-width:0}
.ye-cover-reference__preview img{width:180px;max-width:100%;max-height:240px;object-fit:cover;border-radius:8px;border:1px solid #dbe3ee;background:#fff;box-shadow:0 8px 20px rgba(15,23,42,.08)}
.ye-cover-reference__empty{padding:14px 16px;border:1px dashed #cbd5e1;border-radius:8px;background:#fff;color:#64748b;font-size:13px;line-height:1.6;min-height:44px;display:flex;align-items:center}
.ye-cover-reference__meta{font-size:12px;color:#6b7280}
.ye-cover-advanced{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.ye-cover-advanced .ye-input{width:100%}
.ye-cover-form .ye-form-row{margin-bottom:0}
.ye-cover-form .ye-form-row label{margin-bottom:7px;color:#1f2937}
.ye-cover-form .ye-textarea{min-height:128px;line-height:1.65}
.ye-cover-taskbar{display:flex;align-items:center;gap:10px;flex-wrap:wrap;padding:12px 14px;background:#f8fafc;border:1px solid #eef2f7;border-radius:8px}
.ye-cover-taskbar__hint{font-size:12px;color:#6b7280}
.ye-cover-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:18px;align-items:start}
.ye-cover-card{background:#fff;border-radius:8px;overflow:hidden;box-shadow:0 8px 20px rgba(15,23,42,.07);border:1px solid #e5e7eb;transition:border-color .15s,box-shadow .15s,transform .15s}
.ye-cover-card:hover{box-shadow:0 12px 28px rgba(15,23,42,.11);transform:translateY(-1px)}
.ye-cover-card--selected{border-color:#2563eb;box-shadow:0 0 0 3px rgba(37,99,235,.12),0 10px 24px rgba(15,23,42,.08)}
.ye-cover-card img{width:100%;display:block;object-fit:cover;aspect-ratio:5/8;background:#f8fafc}
.ye-cover-card__actions{padding:12px;display:flex;gap:8px;justify-content:flex-end;border-top:1px solid #f1f5f9}
.ye-cover-card--pending{min-height:340px;border:1px dashed #cbd5e1;background:linear-gradient(180deg,#fff,#f8fafc);box-shadow:none}
.ye-cover-card__pending{min-height:340px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;color:#64748b;text-align:center;padding:20px}
.ye-cover-card__pending strong{font-size:15px;color:#334155}
.ye-cover-spinner{width:34px;height:34px;border-radius:50%;border:3px solid #dbeafe;border-top-color:#2563eb;animation:yeSpin .8s linear infinite}
.ye-cover-placeholder{text-align:center;padding:70px 20px;color:#9ca3af;background:#fff;border:1px dashed #cbd5e1;border-radius:8px;grid-column:1/-1}

/* ── AI Panel ── */
.ye-ai-panel{width:320px;flex-shrink:0;background:#fff;border-left:1px solid #e5e7eb;display:flex;flex-direction:column;overflow:hidden}
.ye-ai-panel__header{padding:12px 16px;border-bottom:1px solid #e5e7eb;display:flex;justify-content:space-between;align-items:center;font-weight:600;font-size:13px}
.ye-ai-panel__body{flex:1;overflow-y:auto;padding:16px}
.ye-ai-list{list-style:none;padding:0;margin:0}
.ye-ai-list li{padding:10px 12px;background:#f9fafb;border-radius:6px;margin-bottom:8px;font-size:13px;line-height:1.6}
.ye-ai-scores{margin-bottom:14px}
.ye-ai-score-row{display:flex;align-items:center;gap:10px;margin-bottom:8px;font-size:13px}
.ye-score-bar{flex:1;height:6px;background:#e5e7eb;border-radius:3px;overflow:hidden}
.ye-score-bar>div{height:100%;background:#2563eb;border-radius:3px}
.ye-loading{padding:24px;text-align:center;color:#6b7280}

/* ── Modal ── */
.ye-overlay{position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:9999;display:flex;align-items:center;justify-content:center}
.ye-modal{background:#fff;border-radius:12px;width:460px;max-width:95vw;box-shadow:0 20px 60px rgba(0,0,0,.2)}
.ye-modal__hd{padding:20px 24px 0;display:flex;justify-content:space-between;align-items:center}
.ye-modal__hd h3{margin:0;font-size:17px}
.ye-modal__bd{padding:18px 24px}
.ye-modal__ft{padding:0 24px 20px;display:flex;justify-content:flex-end;gap:8px}
.ye-form-row{margin-bottom:14px}
.ye-form-row label{display:block;font-size:13px;font-weight:500;margin-bottom:4px;color:#374151}

/* ── Toast ── */
.ye-toast{position:fixed;bottom:24px;right:24px;z-index:10000;padding:12px 20px;border-radius:8px;font-size:14px;box-shadow:0 4px 16px rgba(0,0,0,.15);max-width:320px;animation:yeSlideUp .2s ease}
.ye-toast--info{background:#1f2937;color:#fff}
.ye-toast--success{background:#065f46;color:#fff}
.ye-toast--error{background:#991b1b;color:#fff}
@keyframes yeSlideUp{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}
@keyframes yeSpin{from{transform:rotate(0)}to{transform:rotate(360deg)}}

/* ── Responsive ── */
@media(max-width:1100px){
  .ye-layout-editor{grid-template-columns:180px minmax(0,1fr)}
  .ye-layout-inspector{grid-column:1/-1;border-left:none;border-top:1px solid #e5e7eb;max-height:260px}
  .ye-cover-toolbar{grid-template-columns:repeat(2,minmax(0,1fr))}
  .ye-cover-toolbar .ye-btn{grid-column:1 / -1}
  .ye-cover-reference{grid-template-columns:1fr}
  .ye-cover-reference__preview{grid-column:auto}
  .ye-cover-advanced{grid-template-columns:1fr}
}

@media(max-width:767px){
  .ye-sidebar{display:none}
  .ye-layout-editor{grid-template-columns:1fr}
  .ye-layout-pages{max-height:180px;border-right:none;border-bottom:1px solid #e5e7eb}
  .ye-layout-toolbar{align-items:flex-start}
  .ye-layout-canvas-wrap{padding:16px;justify-content:flex-start}
  .ye-ai-panel{display:none}
  .ye-book-grid{grid-template-columns:1fr 1fr}
  .ye-topbar__title{display:none}
  .ye-section{padding:16px}
  .ye-cover-form{padding:14px;gap:14px}
  .ye-cover-toolbar{grid-template-columns:1fr;padding:12px}
  .ye-cover-reference__body{flex-direction:column;align-items:stretch}
  .ye-cover-reference__file{max-width:none}
  .ye-cover-grid{grid-template-columns:1fr;gap:14px}
  .ye-cover-toolbar,.ye-cover-advanced{grid-template-columns:1fr}
}