* { margin: 0; padding: 0; box-sizing: border-box; }

        :root {
            --primary: #2563eb;
            --primary-hover: #1d4ed8;
            --primary-light: #dbeafe;
            --danger: #dc2626;
            --danger-hover: #b91c1c;
            --success: #16a34a;
            --warning: #f59e0b;
            --bg: #f1f5f9;
            --card: #ffffff;
            --text: #1e293b;
            --text-light: #64748b;
            --border: #e2e8f0;
            --shadow: 0 1px 3px rgba(0,0,0,0.12);
        }

        [data-theme="dark"] {
            --primary: #3b82f6;
            --primary-hover: #60a5fa;
            --primary-light: #1e3a5f;
            --danger: #ef4444;
            --danger-hover: #f87171;
            --success: #22c55e;
            --warning: #fbbf24;
            --bg: #0f172a;
            --card: #1e293b;
            --text: #e2e8f0;
            --text-light: #94a3b8;
            --border: #334155;
            --shadow: 0 1px 3px rgba(0,0,0,0.4);
        }

        body {
            font-family: 'Segoe UI', 'Meiryo', sans-serif;
            background: var(--bg);
            color: var(--text);
            min-height: 100vh;
        }

        /* ヘッダー */
        .header {
            background: var(--card);
            border-bottom: 1px solid var(--border);
            padding: 12px 24px;
            display: flex;
            align-items: center;
            gap: 16px;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 100;
        }
        .header h1 { font-size: 20px; font-weight: 700; color: var(--primary); }
        .header-actions { margin-left: auto; display: flex; gap: 8px; flex-wrap: wrap; }

        /* ボタン共通 */
        .btn {
            padding: 8px 16px;
            border: none;
            border-radius: 6px;
            font-size: 13px;
            font-weight: 600;
            cursor: pointer;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: all 0.15s;
            white-space: nowrap;
        }
        .btn:hover { transform: translateY(-1px); }
        .btn:active { transform: translateY(0); }
        .btn-primary { background: var(--primary); color: #fff; }
        .btn-primary:hover { background: var(--primary-hover); }
        .btn-danger { background: var(--danger); color: #fff; }
        .btn-danger:hover { background: var(--danger-hover); }
        .btn-success { background: var(--success); color: #fff; }
        .btn-success:hover { background: #15803d; }
        .btn-warning { background: var(--warning); color: #1e293b; }
        .btn-outline { background: transparent; border: 1px solid var(--border); color: var(--text); }
        .btn-outline:hover { background: var(--bg); }
        .btn-sm { padding: 5px 10px; font-size: 12px; }

        /* レイアウト */
        .layout { display: flex; height: calc(100vh - 57px); }

        /* サイドバー */
        .sidebar {
            width: 220px;
            min-width: 120px;
            max-width: 800px;
            background: var(--card);
            border-right: none;
            display: flex;
            flex-direction: column;
            overflow-y: auto;
            flex-shrink: 0;
        }
        .sidebar-resizer {
            width: 5px;
            cursor: col-resize;
            background: var(--border);
            flex-shrink: 0;
            transition: background 0.15s;
        }
        .sidebar-resizer:hover, .sidebar-resizer.dragging {
            background: var(--primary);
        }
        .sidebar-section { padding: 12px; border-bottom: 1px solid var(--border); }
        .sidebar-section h3 {
            font-size: 11px; text-transform: uppercase;
            color: var(--text-light); margin-bottom: 8px; letter-spacing: 0.5px;
        }

        /* ページサムネイル - グリッド配置 */
        #pageList {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
            gap: 6px;
            padding: 4px;
        }
        .page-thumb {
            padding: 8px; border: 2px solid transparent; border-radius: 6px;
            cursor: pointer; text-align: center;
            transition: all 0.15s; position: relative;
        }
        .page-thumb:hover { background: var(--bg); }
        .page-thumb.active { border-color: var(--primary); background: var(--primary-light); }
        .page-thumb.drag-over { border-color: var(--warning); background: #fef3c7; }
        .page-thumb canvas { max-width: 100%; border: 1px solid var(--border); border-radius: 3px; }
        .page-thumb .page-num { font-size: 11px; color: var(--text-light); margin-top: 4px; }
        .page-thumb .page-actions { position: absolute; top: 4px; right: 4px; display: none; gap: 2px; }
        .page-thumb:hover .page-actions { display: flex; }
        .page-action-btn {
            width: 22px; height: 22px; border: none; border-radius: 4px;
            background: rgba(0,0,0,0.6); color: #fff; font-size: 12px;
            cursor: pointer; display: flex; align-items: center; justify-content: center;
        }

        /* メインキャンバスエリア */
        .main-area { flex: 1; display: flex; flex-direction: column; overflow: hidden; }

        /* ツールバー */
        .toolbar {
            padding: 8px 16px; background: var(--card);
            border-bottom: 1px solid var(--border);
            display: flex; align-items: center; gap: 6px; flex-wrap: wrap;
        }
        .toolbar .divider { width: 1px; height: 28px; background: var(--border); margin: 0 4px; }
        .tool-btn {
            padding: 6px 10px; border: 1px solid transparent; border-radius: 5px;
            background: transparent; cursor: pointer; font-size: 13px; color: var(--text);
            display: flex; align-items: center; gap: 4px; transition: all 0.15s;
        }
        .tool-btn:hover { background: var(--bg); }
        .tool-btn.active { background: var(--primary-light); border-color: var(--primary); color: var(--primary); }

        .toolbar input[type="color"] {
            width: 30px; height: 28px; border: 1px solid var(--border);
            border-radius: 4px; cursor: pointer; padding: 2px;
        }
        .toolbar input[type="number"], .toolbar select {
            padding: 5px 8px; border: 1px solid var(--border);
            border-radius: 5px; font-size: 13px; width: 70px;
            background: var(--card); color: var(--text);
        }
        .toolbar select { width: auto; }

        /* カラーパレット */
        .color-palette { display: flex; gap: 3px; align-items: center; }
        .color-swatch {
            width: 22px; height: 22px; border-radius: 4px; border: 2px solid transparent;
            cursor: pointer; transition: all 0.15s;
        }
        .color-swatch:hover { transform: scale(1.15); }
        .color-swatch.active { border-color: var(--text); box-shadow: 0 0 0 2px var(--primary); }

        /* キャンバスコンテナ */
        .canvas-container {
            flex: 1; overflow: auto; display: flex; justify-content: center;
            align-items: flex-start; padding: 24px; background: #cbd5e1;
        }
        .canvas-container.continuous-mode {
            flex-direction: column; align-items: flex-start;
            justify-content: flex-start;
        }
        .canvas-container.continuous-mode .continuous-page-wrapper,
        .canvas-container.continuous-mode .continuous-page-label {
            margin-left: auto; margin-right: auto;
        }
        [data-theme="dark"] .canvas-container { background: #0f172a; }
        .canvas-wrapper { position: relative; box-shadow: 0 4px 20px rgba(0,0,0,0.15); }
        #pdfCanvas { display: block; background: #fff; }
        #overlayCanvas { position: absolute; top: 0; left: 0; cursor: crosshair; }
        /* 連続ページ表示用 */
        .continuous-page-wrapper {
            position: relative; margin-bottom: 16px;
            box-shadow: 0 4px 20px rgba(0,0,0,0.15);
            flex-shrink: 0;
        }
        .continuous-page-wrapper canvas.pdf-page-canvas { display: block; background: #fff; }
        .continuous-page-wrapper canvas.overlay-page-canvas { position: absolute; top: 0; left: 0; cursor: crosshair; }
        .continuous-page-label {
            text-align: center; font-size: 11px; color: var(--text-light);
            padding: 4px 0; background: var(--bg);
            flex-shrink: 0;
        }

        /* 選択ハンドル */
        .selection-handle {
            position: absolute; width: 8px; height: 8px;
            background: var(--primary); border: 1px solid #fff;
            border-radius: 50%; cursor: pointer; z-index: 10;
        }

        /* ドロップゾーン */
        .dropzone {
            flex: 1; display: flex; flex-direction: column;
            align-items: center; justify-content: center;
            border: 3px dashed var(--border); border-radius: 16px;
            margin: 40px; cursor: pointer; transition: all 0.2s;
        }
        .dropzone:hover, .dropzone.dragover { border-color: var(--primary); background: var(--primary-light); }
        .dropzone-icon { font-size: 64px; margin-bottom: 16px; }
        .dropzone h2 { font-size: 20px; margin-bottom: 8px; }
        .dropzone p { color: var(--text-light); font-size: 14px; }

        /* モーダル */
        .modal-overlay {
            position: fixed; inset: 0; background: rgba(0,0,0,0.5);
            display: flex; align-items: center; justify-content: center; z-index: 200;
        }
        .modal {
            background: var(--card); border-radius: 12px; padding: 24px;
            min-width: 360px; max-width: 500px;
            box-shadow: 0 20px 60px rgba(0,0,0,0.3); color: var(--text);
        }
        .modal h3 { margin-bottom: 16px; }
        .modal-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 20px; }
        .form-group { margin-bottom: 12px; }
        .form-group label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 4px; }
        .form-group input, .form-group select, .form-group textarea {
            width: 100%; padding: 8px 10px; border: 1px solid var(--border);
            border-radius: 6px; font-size: 13px; background: var(--card); color: var(--text);
        }

        .hidden { display: none !important; }

        /* スナップショット履歴 */
        .snapshot-item {
            padding: 6px 8px; border: 1px solid var(--border); border-radius: 5px;
            margin-bottom: 4px; font-size: 11px; cursor: pointer;
            display: flex; justify-content: space-between; align-items: center; transition: all 0.15s;
        }
        .snapshot-item:hover { background: var(--primary-light); border-color: var(--primary); }
        .snapshot-item .snap-info { flex: 1; }
        .snapshot-item .snap-label { font-weight: 600; color: var(--text); }
        .snapshot-item .snap-time { color: var(--text-light); font-size: 10px; }
        .snapshot-item .snap-restore {
            padding: 2px 8px; background: var(--primary); color: #fff;
            border: none; border-radius: 3px; font-size: 10px; cursor: pointer; white-space: nowrap;
        }

        /* ステータスバー */
        .statusbar {
            padding: 4px 16px; background: var(--card);
            border-top: 1px solid var(--border); font-size: 12px;
            color: var(--text-light); display: flex; gap: 16px;
        }

        /* トースト通知 */
        .toast {
            position: fixed; bottom: 40px; right: 24px;
            background: #1e293b; color: #fff; padding: 12px 20px;
            border-radius: 8px; font-size: 13px; z-index: 300;
            animation: toastIn 0.3s ease;
        }
        @keyframes toastIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }

        /* スタンプ選択パネル */
        .stamp-panel {
            position: absolute; top: 100%; left: 0; background: var(--card);
            border: 1px solid var(--border); border-radius: 8px;
            box-shadow: 0 8px 24px rgba(0,0,0,0.15); padding: 8px;
            display: grid; grid-template-columns: 1fr 1fr; gap: 4px;
            z-index: 50; min-width: 200px;
        }
        .stamp-option {
            padding: 8px 12px; border: 1px solid var(--border); border-radius: 4px;
            cursor: pointer; font-size: 12px; font-weight: 600; text-align: center;
            transition: all 0.15s;
        }
        .stamp-option:hover { background: var(--primary-light); border-color: var(--primary); }

        /* 消しゴムハイライト */
        .eraser-highlight {
            position: absolute; pointer-events: none;
            border: 2px solid var(--danger); background: rgba(220,38,38,0.1);
            border-radius: 3px; z-index: 5;
        }

        /* ミニマップ */
        .minimap-container {
            position: relative; width: 100%; max-height: 180px;
            overflow: hidden; border: 1px solid var(--border); border-radius: 6px;
            cursor: pointer; background: #fff;
        }
        [data-theme="dark"] .minimap-container { background: #334155; }
        .minimap-container canvas { width: 100%; display: block; }
        .minimap-viewport {
            position: absolute; border: 2px solid var(--primary);
            background: rgba(37,99,235,0.1); pointer-events: none;
        }

        /* 注釈一覧パネル */
        .ann-panel { max-height: 250px; overflow-y: auto; }
        .prop-panel { background: var(--surface); border-bottom: 1px solid var(--border); padding: 6px 12px; }
        .prop-group { display: inline-flex; align-items: center; gap: 4px; font-size: 12px; color: var(--text-light); }
        .prop-group label { font-size: 11px; color: #64748b; white-space: nowrap; }
        .prop-group input[type="number"], .prop-group select, .prop-group input[type="text"] {
            background: var(--bg); color: var(--text); border: 1px solid var(--border); border-radius: 4px; padding: 2px 4px; font-size: 12px;
        }
        .prop-group input[type="color"] { width: 28px; height: 22px; padding: 0; border: 1px solid var(--border); border-radius: 4px; cursor: pointer; }
        .ann-item {
            padding: 6px 8px; border: 1px solid var(--border); border-radius: 5px;
            margin-bottom: 4px; font-size: 11px; cursor: pointer;
            display: flex; justify-content: space-between; align-items: center;
            transition: all 0.15s; gap: 4px;
        }
        .ann-item:hover { background: var(--primary-light); border-color: var(--primary); }
        .ann-item .ann-icon { font-size: 14px; flex-shrink: 0; }
        .ann-item .ann-info { flex: 1; overflow: hidden; }
        .ann-item .ann-type { font-weight: 600; color: var(--text); font-size: 11px; }
        .ann-item .ann-detail { color: var(--text-light); font-size: 10px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
        .ann-item .ann-actions { display: flex; gap: 2px; flex-shrink: 0; }
        .ann-item .ann-action-btn {
            width: 20px; height: 20px; border: none; border-radius: 3px;
            background: transparent; cursor: pointer; font-size: 11px;
            display: flex; align-items: center; justify-content: center;
            color: var(--text-light);
        }
        .ann-item .ann-action-btn:hover { background: var(--bg); color: var(--text); }
        .ann-item.locked { opacity: 0.6; }
        .ann-item.locked .ann-type::after { content: ' 🔒'; font-size: 10px; }

        /* グリッドオーバーレイ */
        #gridCanvas {
            position: absolute; top: 0; left: 0; pointer-events: none; z-index: 3;
        }

        /* ページサイズダイアログ */
        .size-preset {
            padding: 8px 12px; border: 1px solid var(--border); border-radius: 6px;
            cursor: pointer; font-size: 12px; text-align: center; transition: all 0.15s;
        }
        .size-preset:hover { background: var(--primary-light); border-color: var(--primary); }
        .size-preset.active { background: var(--primary-light); border-color: var(--primary); font-weight: 600; }

        /* ツールバーお気に入り */
        .toolbar-favorites {
            display: flex; gap: 4px; padding: 4px 8px;
            background: var(--primary-light); border-radius: 6px;
        }
        .fav-indicator { font-size: 10px; color: var(--warning); position: absolute; top: -2px; right: -2px; }

        /* 検索バー */
        .search-bar {
            display: flex; align-items: center; gap: 6px;
            padding: 6px 12px; background: var(--card);
            border-bottom: 1px solid var(--border);
        }
        .search-bar.hidden { display: none; }
        .search-highlight {
            position: absolute; background: rgba(255,235,59,0.4);
            pointer-events: none; z-index: 3;
        }
        .search-highlight.active {
            background: rgba(255,152,0,0.6);
            outline: 2px solid #ff9800;
        }

        /* リサイズハンドル */
        .resize-handle {
            position: absolute; width: 10px; height: 10px;
            background: var(--primary); border: 1px solid #fff;
            border-radius: 2px; cursor: pointer; z-index: 10;
        }
        .resize-handle.nw { cursor: nw-resize; }
        .resize-handle.ne { cursor: ne-resize; }
        .resize-handle.sw { cursor: sw-resize; }
        .resize-handle.se { cursor: se-resize; }
        .resize-handle.n { cursor: n-resize; }
        .resize-handle.s { cursor: s-resize; }
        .resize-handle.e { cursor: e-resize; }
        .resize-handle.w { cursor: w-resize; }

        /* プログレスバーオーバーレイ */
        .progress-overlay {
            position: fixed; inset: 0;
            background: rgba(0,0,0,0.45);
            display: flex; align-items: center; justify-content: center;
            z-index: 500;
        }
        .progress-box {
            background: var(--card);
            border-radius: 12px;
            padding: 28px 36px;
            min-width: 340px;
            max-width: 450px;
            box-shadow: 0 20px 60px rgba(0,0,0,0.3);
            text-align: center;
        }
        .progress-title {
            font-size: 15px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 16px;
        }
        .progress-bar-container {
            width: 100%;
            height: 10px;
            background: var(--border);
            border-radius: 5px;
            overflow: hidden;
            margin-bottom: 10px;
        }
        .progress-bar-fill {
            height: 100%;
            background: var(--primary);
            border-radius: 5px;
            width: 0%;
            transition: width 0.15s ease;
            will-change: width, transform;
        }
        .progress-bar-fill.indeterminate {
            width: 40%;
            animation: indeterminate 1.4s ease-in-out infinite;
        }
        @keyframes indeterminate {
            0% { transform: translateX(-100%); }
            100% { transform: translateX(350%); }
        }
        .progress-detail {
            font-size: 12px;
            color: var(--text-light);
            min-height: 18px;
        }

/* しおり */
/* ドロップハイライト */
.canvas-container.drag-highlight { outline: 3px dashed #2563eb; outline-offset: -3px; background: rgba(37,99,235,0.05); }
.bookmark-item { padding: 3px 4px; cursor: pointer; border-radius: 3px; line-height: 1.4; word-break: break-all; }
.bookmark-item:hover { background: var(--hover); }
.bookmark-item .bm-children { margin-left: 12px; }
.bookmark-toggle { display:inline-block; width:14px; text-align:center; cursor:pointer; color:var(--text-light); font-size:10px; }