:root {
    --bg-page: #f8fafc;
    --card-bg: #ffffff;
    --border-color: #cbd5e1;
    --border-light: #e2e8f0;
    --primary-color: #0d9488;
    --primary-hover: #0f766e;
    --primary-light: #ccfbf1;
    --accent-color: #3b82f6;
    --accent-hover: #2563eb;
    --text-color: #0f172a;
    --text-muted: #64748b;
    --danger-color: #ef4444;
    --danger-bg: #fef2f2;
    --radius: 12px;
    --radius-sm: 8px;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 10px 25px -5px rgba(0, 0, 0, 0.08);
}

body {
    margin: 0;
    background-color: var(--bg-page);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    color: var(--text-color);
    -webkit-font-smoothing: antialiased;
}

.tool-wrap {
    max-width: 1240px;
    margin: 0 auto;
    padding: 16px 20px;
    box-sizing: border-box;
}

/* Header Bar - Compact & Slim */
.tool-header-bar {
    background: #ffffff;
    padding: 10px 16px;
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    margin-bottom: 12px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px 14px;
}

.tool-brand-col {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.tool-brand-col .back-link {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-size: 11.5px;
    font-weight: 600;
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.15s;
    line-height: 1;
}

.tool-brand-col .back-link:hover {
    color: var(--primary-color);
}

.tool-title-row {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.tool-title-row h1 {
    font-size: 1.25rem;
    margin: 0;
    font-weight: 800;
    color: var(--text-color);
    display: inline-flex;
    align-items: center;
    gap: 4px;
    line-height: 1.2;
}

.privacy-badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    background: #ecfdf5;
    color: #065f46;
    border: 1px solid #a7f3d0;
    padding: 2px 8px;
    border-radius: 9999px;
    font-size: 11px;
    font-weight: 700;
    line-height: 1.2;
}

.privacy-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background-color: #10b981;
    display: inline-block;
    box-shadow: 0 0 5px #10b981;
}

.tool-header-actions {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    align-items: center;
}

/* Header Selects (Presets & Themes) */
.select-wrapper {
    position: relative;
    display: inline-block;
}

.header-select {
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background-color: #f8fafc;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 8px center;
    background-size: 10px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 6px 24px 6px 9px;
    font-size: 12.5px;
    font-weight: 700;
    color: var(--text-color);
    cursor: pointer;
    font-family: inherit;
    transition: all 0.15s ease;
    box-shadow: var(--shadow-sm);
    max-width: 175px;
    white-space: nowrap;
    text-overflow: ellipsis;
}

.header-select:hover {
    background-color: #ffffff;
    border-color: #94a3b8;
}

.header-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px var(--primary-light);
}

/* Undo / Redo Group */
.undo-redo-group {
    display: inline-flex;
    gap: 2px;
    background: #f1f5f9;
    border-radius: var(--radius-sm);
    padding: 2px;
}

.btn-icon-sm {
    padding: 4px 7px !important;
    min-width: 28px;
    height: 28px;
    font-size: 12px;
    background: #ffffff !important;
    border-color: var(--border-light) !important;
    border-radius: 6px !important;
}

.btn-icon-sm:hover:not(:disabled) {
    background: #e2e8f0 !important;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
    padding: 7px 12px;
    border-radius: var(--radius-sm);
    font-size: 12.5px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.15s ease-in-out;
    border: 1px solid transparent;
    font-family: inherit;
    text-decoration: none;
    box-sizing: border-box;
    line-height: 1.2;
}

.btn-sm {
    padding: 6px 11px;
    font-size: 12px;
    height: 32px;
}

.btn:disabled {
    opacity: 0.45;
    cursor: not-allowed;
    pointer-events: none;
}

.btn-primary {
    background-color: var(--primary-color);
    color: #ffffff;
    box-shadow: 0 1px 3px rgba(13, 148, 136, 0.2);
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 3px 6px rgba(13, 148, 136, 0.28);
}

.btn-outline {
    background-color: #ffffff;
    border-color: var(--border-color);
    color: var(--text-color);
}

.btn-outline:hover {
    background-color: #f1f5f9;
    border-color: #94a3b8;
}

.btn-outline-danger {
    background-color: var(--danger-bg);
    border-color: #fca5a5;
    color: var(--danger-color);
}

.btn-outline-danger:hover {
    background-color: #fee2e2;
    border-color: #f87171;
}

/* Settings Panel */
.settings-panel {
    background: #ffffff;
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    margin-bottom: 16px;
    box-shadow: var(--shadow-md);
    overflow: hidden;
    animation: panelSlideDown 0.2s ease-out;
}

@keyframes panelSlideDown {
    from { opacity: 0; transform: translateY(-8px); }
    to { opacity: 1; transform: translateY(0); }
}

.settings-panel-inner {
    padding: 18px 22px;
}

.settings-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-light);
    padding-bottom: 12px;
    margin-bottom: 16px;
}

.settings-header h3 {
    margin: 0;
    font-size: 1.1rem;
    font-weight: 800;
    color: var(--text-color);
}

.settings-close-btn {
    background: transparent;
    border: none;
    font-size: 24px;
    line-height: 1;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0 4px;
}

.settings-close-btn:hover {
    color: var(--text-color);
}

.settings-sections-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 16px;
    margin-bottom: 16px;
}

.settings-card {
    background: #f8fafc;
    border: 1px solid var(--border-light);
    border-radius: var(--radius-sm);
    padding: 14px 16px;
}

.settings-card-wide {
    grid-column: 1 / -1;
}

.settings-card h4 {
    margin: 0 0 12px 0;
    font-size: 13.5px;
    font-weight: 800;
    color: var(--text-color);
    display: flex;
    align-items: center;
    gap: 6px;
}

.settings-field-group {
    margin-bottom: 12px;
}

.settings-field-group:last-child {
    margin-bottom: 0;
}

.settings-field-group label,
.settings-two-col label {
    display: flex;
    flex-direction: column;
    font-size: 12.5px;
    font-weight: 600;
    color: var(--text-color);
    gap: 6px;
}

.settings-two-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.settings-select,
.settings-input {
    padding: 7px 10px;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    font-size: 13px;
    background-color: #ffffff;
    color: var(--text-color);
    font-family: inherit;
    box-sizing: border-box;
    width: 100%;
}

.settings-select:focus,
.settings-input:focus {
    border-color: var(--primary-color);
    outline: none;
    box-shadow: 0 0 0 2px rgba(13, 148, 136, 0.15);
}

.input-with-unit {
    position: relative;
    display: flex;
    align-items: center;
}

.input-with-unit input {
    padding-right: 36px;
}

.input-with-unit span {
    position: absolute;
    right: 10px;
    font-size: 12px;
    color: var(--text-muted);
    pointer-events: none;
    font-weight: 600;
}

.period-stepper {
    display: flex;
    align-items: center;
    gap: 6px;
}

.stepper-btn {
    width: 32px;
    height: 32px;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    background: #ffffff;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.15s;
}

.stepper-btn:hover {
    background: #e2e8f0;
}

.period-stepper input {
    width: 60px;
    text-align: center;
}

.stepper-unit {
    font-size: 12.5px;
    color: var(--text-muted);
    font-weight: 500;
}

/* Pause settings grid */
.pause-settings-grid {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.pause-setting-row {
    display: grid;
    grid-template-columns: 80px 110px 120px 1fr;
    gap: 12px;
    align-items: center;
    background: #ffffff;
    padding: 8px 12px;
    border-radius: 6px;
    border: 1px solid var(--border-light);
}

.pause-setting-row label {
    display: flex;
    flex-direction: column;
    font-size: 11.5px;
    font-weight: 600;
    gap: 4px;
    color: var(--text-muted);
}

.pause-num {
    font-size: 12.5px;
    font-weight: 700;
    color: var(--text-color);
}

.settings-footer {
    border-top: 1px solid var(--border-light);
    padding-top: 14px;
    text-align: right;
}

/* Designer Toolbar & Subject Chips */
.designer-toolbar-card {
    background: #ffffff;
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    padding: 14px 18px;
    margin-bottom: 14px;
    box-shadow: var(--shadow-sm);
}

.palette-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 12px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border-light);
}

.palette-title-group {
    display: flex;
    align-items: baseline;
    gap: 8px;
    flex-wrap: wrap;
}

.palette-title {
    font-size: 13.5px;
    font-weight: 800;
    color: var(--text-color);
}

.palette-hint {
    font-size: 11.5px;
    color: var(--text-muted);
}

.palette-actions {
    display: flex;
    gap: 8px;
}

.btn-tool-accent {
    background: #eff6ff;
    color: var(--accent-hover);
    border: 1px solid #bfdbfe;
    padding: 5px 10px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.15s;
}

.btn-tool-accent:hover {
    background: #dbeafe;
    border-color: #93c5fd;
}

.btn-tool-secondary {
    background: #f8fafc;
    color: var(--text-color);
    border: 1px solid var(--border-color);
    padding: 5px 10px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s;
}

.btn-tool-secondary:hover {
    background: #e2e8f0;
}

.palette-chips-wrap {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
    padding-bottom: 8px;
}

.chips-separator {
    width: 1px;
    height: 28px;
    background-color: var(--border-color);
    margin: 0 4px;
}

/* Tool Chips (Normal, Eraser) */
.tool-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    border-radius: 8px;
    border: 1.5px solid var(--border-color);
    background: #f8fafc;
    color: var(--text-color);
    font-size: 12.5px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.15s ease;
    user-select: none;
    font-family: inherit;
}

.tool-chip:hover {
    background: #e2e8f0;
    border-color: #94a3b8;
}

.tool-chip.active {
    background: #0f172a;
    color: #ffffff;
    border-color: #0f172a;
    box-shadow: 0 2px 5px rgba(15, 23, 42, 0.25);
}

.tool-chip-eraser.active {
    background: #ef4444;
    color: #ffffff;
    border-color: #dc2626;
    box-shadow: 0 2px 5px rgba(239, 68, 68, 0.3);
}

/* Subject Chips */
.subject-chips-container {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    align-items: center;
}

.subject-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 11px;
    border-radius: 8px;
    border: 2px solid transparent;
    color: #ffffff;
    font-size: 12px;
    font-weight: 700;
    cursor: grab;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    transition: transform 0.12s, box-shadow 0.12s, border-color 0.12s;
    user-select: none;
    font-family: inherit;
}

.subject-chip:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

.subject-chip:active {
    cursor: grabbing;
}

.subject-chip.dragging {
    opacity: 0.45;
    transform: scale(0.95);
}

.subject-chip.active-brush {
    border-color: #0f172a !important;
    box-shadow: 0 0 0 2px #ffffff, 0 0 0 4.5px #0f172a !important;
    transform: scale(1.05);
}

.chip-emoji {
    font-size: 13px;
    filter: drop-shadow(0 1px 1px rgba(0,0,0,0.2));
}

.chip-short {
    font-size: 10.5px;
    background: rgba(255, 255, 255, 0.3);
    padding: 1px 5px;
    border-radius: 4px;
    font-weight: 800;
    letter-spacing: 0.5px;
}

/* Toolbar Options Bar */
.toolbar-options-bar {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    align-items: center;
    margin-top: 8px;
    padding-top: 8px;
    border-top: 1px dashed var(--border-light);
}

.toggle-checkbox-label {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-color);
    cursor: pointer;
    user-select: none;
}

.toggle-checkbox-label input {
    cursor: pointer;
    margin: 0;
}

/* Double period toggle wrap */
.double-period-toggle-wrap {
    margin-bottom: 12px;
    padding: 8px 12px;
    background: #f0fdfa;
    border: 1px solid #99f6e4;
    border-radius: 8px;
}

.double-period-label {
    font-weight: 700;
    color: #0f766e;
    font-size: 12.5px;
}

/* Float Brush Status Bar */
.brush-status-bar {
    position: sticky;
    top: 10px;
    z-index: 99;
    background: #0f172a;
    color: #ffffff;
    border-radius: 9999px;
    padding: 8px 18px;
    margin: 0 auto 12px auto;
    width: fit-content;
    display: flex;
    align-items: center;
    gap: 12px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
    font-size: 13px;
    animation: statusSlide 0.2s ease-out;
}

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

.brush-status-hint {
    color: #94a3b8;
    font-size: 12px;
}

#brush-status-cancel {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: #ffffff;
    font-size: 11.5px;
    font-weight: bold;
    padding: 4px 8px;
    border-radius: 9999px;
    cursor: pointer;
}

#brush-status-cancel:hover {
    background: rgba(255, 255, 255, 0.35);
}

/* ==========================================================================
   Timetable Card & Themes
   ========================================================================== */

.timetable-card-wrap {
    background: #ffffff;
    border-radius: var(--radius);
    padding: 20px 24px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    margin: 0 auto;
    transition: max-width 0.25s ease, background-color 0.2s, border-color 0.2s;
    box-sizing: border-box;
}

.timetable-card-wrap.orientation-landscape {
    max-width: 1180px;
}

.timetable-card-wrap.orientation-portrait {
    max-width: 840px;
}

/* Title bar in plan */
.timetable-title-bar {
    text-align: center;
    margin-bottom: 14px;
    padding-bottom: 12px;
    border-bottom: 2px solid #f1f5f9;
}

.timetable-title-input {
    width: 100%;
    max-width: 700px;
    font-size: 1.45rem;
    font-weight: 800;
    color: var(--text-color);
    text-align: center;
    border: 1px dashed transparent;
    border-radius: 6px;
    padding: 4px 8px;
    background: transparent;
    box-sizing: border-box;
    transition: border-color 0.2s, background 0.2s;
    font-family: inherit;
}

.timetable-title-input:hover {
    border-color: var(--border-color);
    background: #f8fafc;
}

.timetable-title-input:focus {
    border-color: var(--primary-color);
    background: #ffffff;
    outline: none;
    box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.15);
}

.timetable-subtitle-input {
    width: 100%;
    max-width: 600px;
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--text-muted);
    text-align: center;
    border: 1px dashed transparent;
    border-radius: 6px;
    padding: 3px 8px;
    margin-top: 2px;
    background: transparent;
    box-sizing: border-box;
    transition: border-color 0.2s, background 0.2s;
    font-family: inherit;
}

.timetable-subtitle-input:hover {
    border-color: var(--border-color);
    background: #f8fafc;
}

.timetable-subtitle-input:focus {
    border-color: var(--primary-color);
    background: #ffffff;
    outline: none;
    box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.15);
}

/* Timetable Container & CSS Grid */
.timetable-container {
    overflow-x: auto;
    width: 100%;
}

#timetable {
    display: grid;
    gap: 6px;
    background: #ffffff;
    padding: 4px;
    border-radius: var(--radius-sm);
    width: 100%;
    min-width: 620px;
    margin: 0 auto;
    box-sizing: border-box;
}

#timetable.hide-details .cell-subparts,
#timetable.hide-details .cell br {
    display: none !important;
}

#timetable.hide-timecol .time-col-item {
    display: none !important;
}

/* Grid Headers */
.header {
    font-weight: 800;
    font-size: 13.5px;
    padding: 10px 8px;
    background-color: #f1f5f9;
    color: var(--text-color);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    border: 1px solid var(--border-light);
}

/* Time Cells */
.time-cell {
    font-size: 11.5px;
    font-weight: 700;
    color: var(--text-muted);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background-color: #f8fafc;
    border-radius: 8px;
    text-align: center;
    padding: 4px 6px;
    border: 1px solid var(--border-color);
    line-height: 1.25;
}

.time-period-badge {
    font-size: 10.5px;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: 2px;
}

/* Subject Cells */
.cell {
    min-height: 64px;
    background-color: #ffffff;
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 13px;
    cursor: pointer;
    border: 2px dashed #cbd5e1;
    text-align: center;
    padding: 6px;
    transition: border-color 0.15s, transform 0.12s, background-color 0.15s, box-shadow 0.15s;
    user-select: none;
    box-sizing: border-box;
    position: relative;
    word-break: break-word;
}

.orientation-portrait .cell {
    min-height: 54px;
    font-size: 12px;
    padding: 4px;
}

.cell:hover {
    border-color: var(--primary-color);
    transform: scale(1.02);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.08);
}

.cell.active-cell {
    border-color: #2563eb !important;
    border-style: solid !important;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.25);
}

.cell.drag-over {
    border: 2px dashed #0d9488 !important;
    background-color: #ccfbf1 !important;
    transform: scale(1.04);
    box-shadow: 0 0 10px rgba(13, 148, 136, 0.3);
}

.cell strong {
    display: flex;
    align-items: center;
    gap: 4px;
    line-height: 1.2;
}

.cell-subparts {
    display: block;
    font-size: 0.82em;
    font-weight: normal;
    opacity: 0.95;
    margin-top: 2px;
    line-height: 1.2;
}

/* Connected Double Period Cells */
.cell.cell-double-top {
    border-bottom: none !important;
    border-bottom-left-radius: 0 !important;
    border-bottom-right-radius: 0 !important;
    margin-bottom: -3px;
    z-index: 2;
}

.cell.cell-double-bottom {
    border-top: 1px dashed rgba(255, 255, 255, 0.4) !important;
    border-top-left-radius: 0 !important;
    border-top-right-radius: 0 !important;
    z-index: 1;
}

.double-period-badge {
    position: absolute;
    top: 3px;
    right: 3px;
    background: rgba(0, 0, 0, 0.25);
    color: #ffffff;
    font-size: 9px;
    font-weight: 800;
    padding: 1px 4px;
    border-radius: 4px;
}

/* Pause Rows */
.pause-row {
    background-color: #f1f5f9;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: var(--text-muted);
    font-size: 12.5px;
    padding: 6px 12px;
    border: 1px dashed var(--border-color);
}

/* Printable Notes Footer */
.timetable-notes-footer {
    margin-top: 14px;
    padding-top: 12px;
    border-top: 1.5px dashed var(--border-color);
}

.notes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 14px;
}

.notes-header {
    font-size: 12px;
    font-weight: 800;
    color: var(--text-color);
    margin-bottom: 4px;
}

.notes-editable {
    font-size: 12px;
    color: #334155;
    background: #f8fafc;
    border: 1px solid var(--border-light);
    border-radius: 6px;
    padding: 8px 12px;
    min-height: 38px;
    outline: none;
    line-height: 1.4;
    transition: background 0.15s, border-color 0.15s;
}

.notes-editable:hover {
    background: #f1f5f9;
}

.notes-editable:focus {
    border-color: var(--primary-color);
    background: #ffffff;
    box-shadow: 0 0 0 2px rgba(13, 148, 136, 0.15);
}

/* ==========================================================================
   Designer Theme Specific Styles
   ========================================================================== */

/* 1. Theme: Minimal (Clean lines, sharp corners, monochrome accents) */
.timetable-card-wrap[data-theme="minimal"] {
    background: #ffffff;
    border: 2px solid #0f172a;
    box-shadow: none;
    border-radius: 4px;
}

.timetable-card-wrap[data-theme="minimal"] .timetable-title-bar {
    border-bottom: 2px solid #0f172a;
}

.timetable-card-wrap[data-theme="minimal"] #timetable {
    border-radius: 0;
    gap: 4px;
}

.timetable-card-wrap[data-theme="minimal"] .header {
    background: #ffffff;
    border: 1.5px solid #0f172a;
    border-radius: 2px;
    color: #0f172a;
    font-family: ui-monospace, monospace;
}

.timetable-card-wrap[data-theme="minimal"] .time-cell {
    background: #ffffff;
    border: 1.5px solid #0f172a;
    border-radius: 2px;
    color: #0f172a;
    font-family: ui-monospace, monospace;
}

.timetable-card-wrap[data-theme="minimal"] .time-period-badge {
    color: #0f172a;
}

.timetable-card-wrap[data-theme="minimal"] .cell {
    border-radius: 2px;
    border-width: 1.5px;
}

.timetable-card-wrap[data-theme="minimal"] .pause-row {
    background: #ffffff;
    border: 1.5px solid #0f172a;
    border-radius: 2px;
    color: #0f172a;
    font-weight: 800;
}

.timetable-card-wrap[data-theme="minimal"] .notes-editable {
    border-radius: 2px;
    border-color: #0f172a;
}

/* 2. Theme: Dark Slate (High-tech dark mode for tablets & students) */
.timetable-card-wrap[data-theme="dark"] {
    background: #0f172a;
    color: #f8fafc;
    border-color: #334155;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}

.timetable-card-wrap[data-theme="dark"] .timetable-title-bar {
    border-bottom-color: #1e293b;
}

.timetable-card-wrap[data-theme="dark"] .timetable-title-input {
    color: #f8fafc;
}

.timetable-card-wrap[data-theme="dark"] .timetable-title-input:hover {
    background: #1e293b;
    border-color: #475569;
}

.timetable-card-wrap[data-theme="dark"] .timetable-subtitle-input {
    color: #94a3b8;
}

.timetable-card-wrap[data-theme="dark"] .timetable-subtitle-input:hover {
    background: #1e293b;
    border-color: #475569;
}

.timetable-card-wrap[data-theme="dark"] #timetable {
    background: #0f172a;
}

.timetable-card-wrap[data-theme="dark"] .header {
    background: #1e293b;
    color: #f8fafc;
    border-color: #334155;
}

.timetable-card-wrap[data-theme="dark"] .time-cell {
    background: #1e293b;
    color: #94a3b8;
    border-color: #334155;
}

.timetable-card-wrap[data-theme="dark"] .time-period-badge {
    color: #2dd4bf;
}

.timetable-card-wrap[data-theme="dark"] .cell {
    border-color: #334155;
    background: #1e293b;
    color: #f8fafc;
}

.timetable-card-wrap[data-theme="dark"] .pause-row {
    background: #1e293b;
    color: #94a3b8;
    border-color: #334155;
}

.timetable-card-wrap[data-theme="dark"] .notes-header {
    color: #38bdf8;
}

.timetable-card-wrap[data-theme="dark"] .notes-editable {
    background: #1e293b;
    color: #cbd5e1;
    border-color: #334155;
}

.timetable-card-wrap[data-theme="dark"] .notes-editable:focus {
    background: #0f172a;
    border-color: #38bdf8;
}

/* 3. Theme: Spar-Druck S/W (Ink Saver for School Photocopy Machines) */
.timetable-card-wrap[data-theme="bw"] {
    background: #ffffff;
    border: 2px solid #000000;
    box-shadow: none;
}

.timetable-card-wrap[data-theme="bw"] .timetable-title-bar {
    border-bottom: 2px solid #000000;
}

.timetable-card-wrap[data-theme="bw"] .timetable-title-input {
    color: #000000;
}

.timetable-card-wrap[data-theme="bw"] .timetable-subtitle-input {
    color: #475569;
}

.timetable-card-wrap[data-theme="bw"] #timetable {
    background: #ffffff;
}

.timetable-card-wrap[data-theme="bw"] .header {
    background: #ffffff;
    color: #000000;
    border: 1.5px solid #000000;
    font-weight: 800;
}

.timetable-card-wrap[data-theme="bw"] .time-cell {
    background: #ffffff;
    color: #000000;
    border: 1.5px solid #000000;
    font-weight: 700;
}

.timetable-card-wrap[data-theme="bw"] .time-period-badge {
    color: #000000;
}

.timetable-card-wrap[data-theme="bw"] .cell {
    background: #ffffff !important;
    color: #000000 !important;
    border: 2px solid #000000 !important;
    box-shadow: none !important;
}

.timetable-card-wrap[data-theme="bw"] .cell-subparts {
    color: #334155 !important;
}

.timetable-card-wrap[data-theme="bw"] .pause-row {
    background: #ffffff;
    color: #000000;
    border: 1.5px dashed #000000;
    font-weight: 800;
}

.timetable-card-wrap[data-theme="bw"] .notes-editable {
    background: #ffffff;
    border: 1.5px solid #000000;
    color: #000000;
}

/* ==========================================================================
   Cursor Mode Indicators
   ========================================================================== */
body.brush-mode-active .cell {
    cursor: cell !important;
}

body.brush-mode-eraser .cell {
    cursor: not-allowed !important;
}

/* Dropdown Menu (••• Mehr) */
.dropdown-wrap {
    position: relative;
    display: inline-block;
}

.dropdown-menu {
    position: absolute;
    right: 0;
    top: calc(100% + 6px);
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-lg);
    min-width: 200px;
    padding: 6px;
    display: none;
    z-index: 1000;
}

.dropdown-menu.show {
    display: block;
    animation: dropdownFadeIn 0.12s ease-out;
}

@keyframes dropdownFadeIn {
    from { opacity: 0; transform: translateY(-4px); }
    to { opacity: 1; transform: translateY(0); }
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-color);
    border-radius: 6px;
    cursor: pointer;
    border: none;
    background: transparent;
    width: 100%;
    text-align: left;
    box-sizing: border-box;
    transition: background 0.15s, color 0.15s;
    font-family: inherit;
}

.dropdown-item:hover {
    background: #f1f5f9;
}

.dropdown-item.danger {
    color: var(--danger-color);
}

.dropdown-item.danger:hover {
    background: var(--danger-bg);
}

.dropdown-divider {
    height: 1px;
    background-color: var(--border-light);
    margin: 4px 0;
}

/* Modals */
.modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 23, 42, 0.4);
    backdrop-filter: blur(3px);
    z-index: 1000;
}

.modal-card {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: #ffffff;
    border-radius: 16px;
    padding: 22px;
    width: 92%;
    box-shadow: var(--shadow-lg);
    z-index: 1001;
    border: 1px solid var(--border-color);
    box-sizing: border-box;
    animation: modalScaleUp 0.18s ease-out;
    max-height: 90vh;
    overflow-y: auto;
}

@keyframes modalScaleUp {
    from { opacity: 0; transform: translate(-50%, -47%) scale(0.96); }
    to { opacity: 1; transform: translate(-50%, -50%) scale(1); }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-light);
    padding-bottom: 12px;
    margin-bottom: 14px;
}

.modal-header h3 {
    margin: 0;
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--text-color);
}

.modal-close-btn {
    background: transparent;
    border: none;
    font-size: 22px;
    line-height: 1;
    cursor: pointer;
    color: var(--text-muted);
}

.modal-close-btn:hover {
    color: var(--text-color);
}

.modal-body {
    margin-bottom: 16px;
}

.modal-label {
    display: block;
    font-size: 12px;
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: 5px;
}

.modal-input {
    width: 100%;
    padding: 8px 11px;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    font-size: 13px;
    box-sizing: border-box;
    font-family: inherit;
    background: #ffffff;
}

.modal-input:focus {
    border-color: var(--primary-color);
    outline: none;
    box-shadow: 0 0 0 2px rgba(13, 148, 136, 0.15);
}

.form-row-two {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    border-top: 1px solid var(--border-light);
    padding-top: 14px;
}

/* Emoji Quick Picker */
.emoji-quick-picker {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(36px, 1fr));
    gap: 6px;
    background: #f8fafc;
    border: 1px solid var(--border-light);
    border-radius: 8px;
    padding: 8px;
    max-height: 120px;
    overflow-y: auto;
}

.emoji-btn {
    width: 36px;
    height: 36px;
    border-radius: 6px;
    border: 1px solid transparent;
    background: #ffffff;
    font-size: 18px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.1s, border-color 0.1s;
}

.emoji-btn:hover {
    transform: scale(1.15);
    border-color: var(--border-color);
}

.emoji-btn.active {
    border-color: var(--primary-color);
    background: var(--primary-light);
    box-shadow: 0 0 0 2px rgba(13, 148, 136, 0.25);
}

/* Color Picker & Preset Swatches */
.color-picker-row {
    display: flex;
    align-items: center;
    gap: 12px;
    background: #f8fafc;
    border: 1px solid var(--border-light);
    border-radius: 8px;
    padding: 8px 12px;
}

.color-swatches {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    flex: 1;
}

.color-swatch-btn {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    border: 2px solid transparent;
    cursor: pointer;
    transition: transform 0.1s;
}

.color-swatch-btn:hover {
    transform: scale(1.2);
}

.color-swatch-btn.active {
    border-color: #0f172a;
    box-shadow: 0 0 0 2px #ffffff;
    transform: scale(1.15);
}

.custom-color-wrap {
    display: flex;
    align-items: center;
}

.custom-color-wrap label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 11.5px;
    font-weight: 700;
    color: var(--text-muted);
    cursor: pointer;
}

.color-native-input {
    width: 32px;
    height: 32px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    padding: 0;
    background: transparent;
}

/* Manage Subjects List */
.manage-subjects-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-height: 320px;
    overflow-y: auto;
    padding-right: 4px;
}

.manage-subject-row {
    display: grid;
    grid-template-columns: 32px 32px 1fr 1fr 1fr 32px;
    gap: 8px;
    align-items: center;
    background: #f8fafc;
    border: 1px solid var(--border-light);
    border-radius: 6px;
    padding: 6px 10px;
    font-size: 12.5px;
}

.manage-subject-del-btn {
    background: transparent;
    border: none;
    cursor: pointer;
    font-size: 14px;
    color: var(--danger-color);
    padding: 2px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.manage-subject-del-btn:hover {
    transform: scale(1.2);
}

/* Quick Select Popover Subjects */
.quick-meta-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-bottom: 12px;
}

.modal-subheading {
    font-size: 12px;
    font-weight: 800;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.popover-subjects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    gap: 8px;
    max-height: 240px;
    overflow-y: auto;
    padding-right: 4px;
}

.popover-subject-btn {
    padding: 8px 10px;
    border-radius: 8px;
    border: none;
    color: #ffffff;
    font-weight: 700;
    font-size: 12.5px;
    cursor: pointer;
    text-align: center;
    transition: transform 0.1s, filter 0.1s;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.25);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    font-family: inherit;
}

.popover-subject-btn:hover {
    transform: scale(1.03);
    filter: brightness(1.06);
}

/* Help Steps List */
.help-steps-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.help-step-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    background: #f8fafc;
    border: 1px solid var(--border-light);
    border-radius: 8px;
    padding: 10px 12px;
    font-size: 13px;
    line-height: 1.45;
}

.help-step-item .step-num {
    width: 26px;
    height: 26px;
    border-radius: 50%;
    background: var(--primary-color);
    color: #ffffff;
    font-weight: 800;
    font-size: 12.5px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    margin-top: 1px;
}

/* Responsive UI adjustments for laptops (1080p / 1366x768) and smaller screens */
@media (max-width: 992px) {
    .tool-header-bar {
        flex-direction: column;
        align-items: stretch;
        gap: 10px;
    }

    .tool-header-actions {
        justify-content: flex-start;
    }

    .header-select {
        max-width: 140px;
    }
}

@media (max-width: 640px) {
    .tool-wrap {
        padding: 8px 10px;
    }

    .tool-header-bar {
        padding: 8px 12px;
    }

    .header-select {
        max-width: 100%;
        flex: 1 1 120px;
    }

    .select-wrapper {
        flex: 1 1 120px;
    }

    .palette-header {
        flex-direction: column;
        align-items: flex-start;
    }
}

/* =========================================================
   Print Styles - Dynamic Landscape / Portrait A4 Fit
   ========================================================= */
@page {
    margin: 6mm;
}

@media print {
    .no-print,
    header,
    footer,
    #header-placeholder,
    #footer-placeholder,
    .back-link,
    .tool-header-bar,
    .presets-themes-container,
    .settings-panel,
    .designer-toolbar-card,
    .brush-status-bar,
    .modal-backdrop,
    .modal-card {
        display: none !important;
    }

    body {
        background: #ffffff !important;
        color: #000000 !important;
        padding: 0 !important;
        margin: 0 !important;
    }

    .content-page {
        padding: 0 !important;
        margin: 0 !important;
    }

    .tool-wrap {
        max-width: 100% !important;
        width: 100% !important;
        padding: 0 !important;
        margin: 0 !important;
    }

    /* In print mode, dark theme prints cleanly on white paper */
    .timetable-card-wrap {
        box-shadow: none !important;
        border: none !important;
        padding: 0 !important;
        margin: 0 !important;
        width: 100% !important;
        max-width: 100% !important;
        background: #ffffff !important;
        color: #000000 !important;
    }

    .timetable-card-wrap[data-theme="dark"] {
        background: #ffffff !important;
        color: #000000 !important;
    }

    .timetable-card-wrap[data-theme="dark"] .timetable-title-input,
    .timetable-card-wrap[data-theme="dark"] .header,
    .timetable-card-wrap[data-theme="dark"] .time-cell,
    .timetable-card-wrap[data-theme="dark"] .pause-row {
        color: #000000 !important;
        background: #f8fafc !important;
        border-color: #cbd5e1 !important;
    }

    .timetable-title-bar {
        display: block !important;
        margin-bottom: 8px !important;
        padding-bottom: 6px !important;
        text-align: center !important;
        border-bottom: 2px solid #0f172a !important;
    }

    .timetable-title-input {
        border: none !important;
        background: transparent !important;
        font-size: 20px !important;
        font-weight: 800 !important;
        text-align: center !important;
        width: 100% !important;
        padding: 0 !important;
        color: #0f172a !important;
    }

    .timetable-subtitle-input {
        border: none !important;
        background: transparent !important;
        font-size: 12px !important;
        font-weight: 600 !important;
        text-align: center !important;
        width: 100% !important;
        padding: 0 !important;
        color: #475569 !important;
        margin-top: 2px !important;
    }

    .timetable-container {
        margin: 0 !important;
        padding: 0 !important;
        width: 100% !important;
    }

    #timetable {
        box-shadow: none !important;
        border: 1.5px solid #cbd5e1 !important;
        padding: 4px !important;
        width: 100% !important;
        max-width: 100% !important;
        min-width: 100% !important;
        gap: 3px !important;
        page-break-inside: avoid;
    }

    .header {
        padding: 5px 3px !important;
        font-size: 12.5px !important;
        -webkit-print-color-adjust: exact !important;
        print-color-adjust: exact !important;
    }

    .cell {
        min-height: 48px !important;
        padding: 3px 4px !important;
        font-size: 11.5px !important;
        -webkit-print-color-adjust: exact !important;
        print-color-adjust: exact !important;
        border-width: 1.5px !important;
    }

    .orientation-portrait .cell {
        min-height: 40px !important;
        font-size: 10.5px !important;
    }

    .time-cell {
        font-size: 10px !important;
        padding: 3px 2px !important;
        -webkit-print-color-adjust: exact !important;
        print-color-adjust: exact !important;
    }

    .pause-row {
        padding: 3px 6px !important;
        font-size: 11px !important;
        -webkit-print-color-adjust: exact !important;
        print-color-adjust: exact !important;
    }

    .timetable-notes-footer {
        margin-top: 8px !important;
        padding-top: 6px !important;
        border-top: 1px solid #cbd5e1 !important;
    }

    .notes-editable {
        background: transparent !important;
        border: none !important;
        padding: 0 !important;
        font-size: 11px !important;
    }
}