:root {
            --bg-color: #fafafa;
            --container-bg: #ffffff;
            --text-color: #1f2937;
            --text-muted: #6b7280;
            --border-color: #e5e7eb;
            --primary: #4f46e5;
            --primary-light: #e0e7ff;
            
            --era-reiwa-text: #ec4899;
            --era-heisei-text: #3b82f6;
            --era-showa-text: #10b981;
            --era-taisho-text: #8b5cf6;
            --era-meiji-text: #ef4444;
        }


        /* Header (Sticky, high utility, no distraction, compact design) */
        .header {
            position: sticky;
            top: 12px;
            z-index: 100;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid rgba(229, 229, 229, 0.8);
            border-radius: 10px;
            padding: 8px 14px;
            box-shadow: 0 4px 20px -6px rgba(0, 0, 0, 0.06);
            margin: 0 auto 16px auto;
            width: 100%;
            max-width: 56rem !important;
            box-sizing: border-box;
        }

        .header-content-compact {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            width: 100%;
        }

        .search-container-compact {
            position: relative;
            flex: 1.5;
            min-width: 150px;
        }

        .search-input-compact {
            width: 100%;
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 6px;
            padding: 6px 30px 6px 28px;
            color: var(--text-color);
            font-size: 11px;
            outline: none;
            transition: all 0.2s;
            font-family: inherit;
        }

        .search-input-compact:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 2px rgba(79, 70, 229, 0.1);
        }

        .search-container-compact .search-icon {
            position: absolute;
            left: 8px;
            top: 50%;
            transform: translateY(-50%);
            font-size: 11px;
            color: var(--text-muted);
            pointer-events: none;
        }

        .search-container-compact .search-shortcut {
            position: absolute;
            right: 8px;
            top: 50%;
            transform: translateY(-50%);
            background: #f3f4f6;
            border: 1px solid #e5e7eb;
            border-radius: 3px;
            padding: 1px 4px;
            font-size: 8px;
            color: var(--text-muted);
            pointer-events: none;
        }

        .calc-bar-compact {
            display: flex;
            align-items: center;
            gap: 6px;
            background: #f9fafb;
            border: 1px solid var(--border-color);
            border-radius: 6px;
            padding: 4px 8px;
            font-size: 11px;
            color: var(--text-muted);
            flex: 1.2;
            min-width: 170px;
        }

        .calc-input-compact {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 4px;
            color: var(--text-color);
            padding: 2px 6px;
            width: 60px;
            font-size: 11px;
            outline: none;
            text-align: center;
            transition: all 0.2s;
        }

        .calc-input-compact:focus {
            border-color: var(--primary);
        }

        .calc-title {
            white-space: nowrap;
            display: inline-flex;
            align-items: center;
            flex-shrink: 0;
        }

        .calc-result {
            font-weight: 700;
            color: var(--primary);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .actions-group-compact {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
        }

        .sort-btn-compact {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 6px;
            padding: 4px 10px;
            cursor: pointer;
            display: flex;
            align-items: center;
            gap: 4px;
            user-select: none;
            transition: all 0.2s;
            font-size: 11px;
            color: var(--text-color);
            font-weight: 500;
        }

        .sort-btn-compact:hover {
            border-color: rgba(79, 70, 229, 0.3);
            background: #fcfbfe;
        }

        .toggle-container-compact {
            display: flex;
            align-items: center;
            gap: 6px;
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 6px;
            padding: 4px 10px;
            cursor: pointer;
            user-select: none;
            transition: all 0.2s;
            font-size: 11px;
            font-weight: 500;
            color: var(--text-color);
        }

        .toggle-container-compact:hover {
            border-color: rgba(79, 70, 229, 0.3);
        }

        .toggle-container-compact.active {
            border-color: rgba(16, 185, 129, 0.3);
            background: #f0fdf4;
            color: #065f46;
        }

        .toggle-switch-compact {
            width: 24px;
            height: 12px;
            background: #cbd5e1;
            border-radius: 99px;
            position: relative;
            transition: background 0.2s;
        }

        .toggle-switch-compact::after {
            content: '';
            position: absolute;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: white;
            top: 2px;
            left: 2px;
            transition: transform 0.2s;
        }

        .toggle-container-compact.active .toggle-switch-compact {
            background: #10b981;
        }

        .toggle-container-compact.active .toggle-switch-compact::after {
            transform: translateX(12px);
        }

        @media (max-width: 768px) {
            .header-content-compact {
                flex-direction: column;
                align-items: stretch;
                gap: 8px;
            }
            .search-container-compact, .calc-bar-compact, .actions-group-compact {
                flex: 1 1 auto;
                width: 100%;
            }
            .actions-group-compact {
                justify-content: space-between;
            }
        }

        /* Container Layout (Full screen expansion using negative margins) */
        .calendar-container {
            width: calc(100% + 3rem) !important;
            max-width: none !important;
            flex-shrink: 0;
            padding: 0 1.5rem 60px 1.5rem;
            box-sizing: border-box;
            margin-left: -1.5rem !important;
            margin-right: -1.5rem !important;
        }

        /* Grid Layout (High Density & Stable, Column-major) */
        .table-list {
            column-width: 180px;
            column-gap: 10px;
            width: 100%;
        }

        .table-list.layout-horizontal {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
            gap: 10px;
            column-width: auto;
        }

        .table-list.layout-horizontal .cell {
            margin-bottom: 0;
            break-inside: auto;
            page-break-inside: auto;
        }

        .cell {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 10px 14px;
            display: grid;
            grid-template-columns: 1fr auto;
            grid-template-rows: auto auto;
            column-gap: 8px;
            row-gap: 6px;
            cursor: pointer;
            user-select: none;
            transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            position: relative;
            box-shadow: 0 1px 2px rgba(0, 0, 0, 0.02);
            align-items: baseline;
            break-inside: avoid;
            page-break-inside: avoid;
            margin-bottom: 10px;
        }

        .cell:hover {
            border-color: rgba(79, 70, 229, 0.4);
            background: #ffffff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px -8px rgba(79, 70, 229, 0.15);
        }

        .cell.era-reiwa { border-left: 4px solid var(--era-reiwa-text); }
        .cell.era-heisei { border-left: 4px solid var(--era-heisei-text); }
        .cell.era-showa { border-left: 4px solid var(--era-showa-text); }
        .cell.era-taisho { border-left: 4px solid var(--era-taisho-text); }
        .cell.era-meiji { border-left: 4px solid var(--era-meiji-text); }

        .cell-era {
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            transition: all 0.2s;
        }

        .calendar-container:not(.seireki-primary) .cell-era {
            font-size: 15px;
            font-weight: 800;
        }

        .calendar-container.seireki-primary .cell-era {
            font-size: 11px;
            font-weight: 700;
        }

        .cell.era-reiwa .cell-era { color: var(--era-reiwa-text); }
        .cell.era-heisei .cell-era { color: var(--era-heisei-text); }
        .cell.era-showa .cell-era { color: var(--era-showa-text); }
        .cell.era-taisho .cell-era { color: var(--era-taisho-text); }
        .cell.era-meiji .cell-era { color: var(--era-meiji-text); }

        .cell-western {
            text-align: right;
            letter-spacing: -0.5px;
            transition: all 0.2s;
        }

        .calendar-container:not(.seireki-primary) .cell-western {
            font-size: 11px;
            font-weight: 700;
            color: var(--text-muted);
        }

        .calendar-container.seireki-primary .cell-western {
            font-size: 15px;
            font-weight: 800;
            color: var(--text-color);
        }

        .cell-age {
            font-size: 10px;
            color: var(--text-muted);
            font-weight: 600;
            white-space: nowrap;
        }

        .cell-zodiac {
            font-size: 10px;
            color: var(--text-muted);
            font-weight: 600;
            text-align: right;
            background: #f3f4f6;
            padding: 1px 4px;
            border-radius: 4px;
        }

        .cell.active {
            border: 2px solid var(--primary) !important;
            background: var(--primary-light) !important;
            z-index: 10;
            box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.2) !important;
        }

        .cell.current-year-cell {
            background: #fffbeb;
            border-color: #f59e0b;
        }

        .cell.current-year-cell::after {
            content: 'NOW';
            position: absolute;
            top: -8px;
            right: -8px;
            font-size: 9px;
            font-weight: 800;
            color: #ffffff;
            background: #f59e0b;
            padding: 2px 6px;
            border-radius: 10px;
            box-shadow: 0 2px 4px rgba(245, 158, 11, 0.3);
        }

        .toast {
            position: fixed;
            bottom: 24px;
            left: 50%;
            transform: translateX(-50%) translateY(100px);
            background: #0f172a;
            color: #ffffff;
            font-size: 12px;
            font-weight: 700;
            padding: 10px 16px;
            border-radius: 6px;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
            transition: transform 0.2s ease-out;
            z-index: 1000;
            pointer-events: none;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .toast.show {
            transform: translateX(-50%) translateY(0);
        }

        /* ── Era Sections ── */
        .era-section-header {
            width: 100%;
            margin-top: 1.5rem;
            margin-bottom: 0.75rem;
            padding-bottom: 0.5rem;
            border-bottom: 1.5px solid var(--border-color);
            display: flex;
            align-items: baseline;
            gap: 10px;
        }
        .era-header-title {
            font-size: 1.125rem;
            font-weight: 800;
            color: var(--text-color);
            font-family: inherit;
        }
        .era-header-range {
            font-size: 11px;
            color: var(--text-muted);
            font-weight: 400;
        }

        /* ── 10-Year Decade indicator ── */
        .cell.decade-cell {
            background-color: #f8fafc;
            border: 1.5px dashed rgba(79, 70, 229, 0.3);
            box-shadow: 0 2px 4px rgba(79, 70, 229, 0.03);
        }

        /* ── Interactive cohort highlights ── */
        .cell.highlight-cohort {
            background-color: #fef08a !important; /* Soft yellow highlight */
            border-color: #ca8a04 !important;
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(202, 138, 4, 0.12);
        }