/* Sudoku Frontend Styles */

.omni-sudoku-game-container {
    max-width: 600px;
    margin: 0 auto;
    padding: 20px;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    box-sizing: border-box;
}

.omni-sudoku-game {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
    width: 100%;
}

/* Grid Wrapper */
.omni-sudoku-grid-wrapper {
    width: min(100%, 450px);
    max-width: 450px;
    aspect-ratio: 1;
    box-sizing: border-box;
}

/* Grid */
.omni-sudoku-grid {
    display: grid;
    gap: 2px;
    background: #333;
    padding: 3px;
    border-radius: 8px;
    width: 100%;
    height: 100%;
    box-sizing: border-box;
}

.omni-sudoku-grid.size-4 {
    grid-template-columns: repeat(4, 1fr);
}

.omni-sudoku-grid.size-6 {
    grid-template-columns: repeat(6, 1fr);
}

.omni-sudoku-grid.size-9 {
    grid-template-columns: repeat(9, 1fr);
}

/* Cells */
.omni-sudoku-cell {
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    background: #fff;
    font-size: clamp(16px, 4vw, 28px);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s ease;
    user-select: none;
    aspect-ratio: 1;
    border: none;
    outline: none;
    box-sizing: border-box;
    min-width: 0;
    overflow: hidden;
}

.omni-sudoku-cell:not(.locked):hover {
    background: #e8f4fc;
}

.omni-sudoku-cell:not(.locked):focus {
    background: #d0e8f8;
    box-shadow: inset 0 0 0 2px #2271b1;
    z-index: 1;
}

.omni-sudoku-cell.locked {
    background: #f0f0f0;
    color: #333;
    cursor: default;
}

.omni-sudoku-cell.selected {
    background: #d0e8f8;
    box-shadow: inset 0 0 0 2px #2271b1;
}

.omni-sudoku-cell.highlighted {
    background: #f0f6fc;
}

.omni-sudoku-cell.error {
    background: #ffe0e0 !important;
    color: #c00;
}

.omni-sudoku-cell.correct {
    background: #e0ffe0;
}

.omni-sudoku-cell .sudoku-cell-image {
    width: 70%;
    height: 70%;
    object-fit: contain;
}

.omni-sudoku-cell-value {
    display: inline-block;
    line-height: 1;
}

.omni-sudoku-cell-clear {
    position: absolute;
    top: 6px;
    right: 6px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 22px;
    padding: 0;
    border: 1px solid rgba(192, 36, 36, 0.2);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.96);
    color: #c02424;
    font-size: 16px;
    line-height: 1;
    cursor: pointer;
    opacity: 0;
    transform: scale(0.9);
    pointer-events: none;
    transition: opacity 0.15s ease, transform 0.15s ease, background-color 0.15s ease, border-color 0.15s ease;
    z-index: 2;
}

.omni-sudoku-cell:not(.locked):hover .omni-sudoku-cell-clear,
.omni-sudoku-cell.selected .omni-sudoku-cell-clear,
.omni-sudoku-cell:focus-within .omni-sudoku-cell-clear {
    opacity: 1;
    transform: scale(1);
    pointer-events: auto;
}

.omni-sudoku-cell-clear:hover {
    background: #fff2f2;
    border-color: rgba(192, 36, 36, 0.4);
}

.omni-sudoku-text-value,
.omni-sudoku-btn-text {
    display: block;
    max-width: 100%;
    overflow: hidden;
    text-align: center;
    line-height: 1.05;
    word-break: break-word;
    overflow-wrap: anywhere;
}

.omni-sudoku-game[data-type="text"] .omni-sudoku-cell {
    padding: 6px 4px;
    font-size: clamp(10px, 1.6vw, 18px);
}

.omni-sudoku-game[data-type="text"] .omni-sudoku-text-value {
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 3;
}

/* Block borders for 4x4 */
.omni-sudoku-grid.size-4 .omni-sudoku-cell:nth-child(4n+2) {
    border-right: 3px solid #333;
}

.omni-sudoku-grid.size-4 .omni-sudoku-cell:nth-child(n+5):nth-child(-n+8) {
    border-bottom: 3px solid #333;
}

/* Block borders for 6x6 (2x3 blocks) */
.omni-sudoku-grid.size-6 .omni-sudoku-cell:nth-child(6n+3) {
    border-right: 3px solid #333;
}

.omni-sudoku-grid.size-6 .omni-sudoku-cell:nth-child(n+7):nth-child(-n+12),
.omni-sudoku-grid.size-6 .omni-sudoku-cell:nth-child(n+19):nth-child(-n+24) {
    border-bottom: 3px solid #333;
}

/* Block borders for 9x9 */
.omni-sudoku-grid.size-9 .omni-sudoku-cell:nth-child(9n+3),
.omni-sudoku-grid.size-9 .omni-sudoku-cell:nth-child(9n+6) {
    border-right: 3px solid #333;
}

.omni-sudoku-grid.size-9 .omni-sudoku-cell:nth-child(n+19):nth-child(-n+27),
.omni-sudoku-grid.size-9 .omni-sudoku-cell:nth-child(n+46):nth-child(-n+54) {
    border-bottom: 3px solid #333;
}

/* Controls Panel */
.omni-sudoku-controls {
    width: min(100%, 450px);
    max-width: 450px;
    box-sizing: border-box;
}

.omni-sudoku-game[data-type="text"] .omni-sudoku-controls {
    width: min(100%, 920px);
    max-width: 920px;
}

.omni-sudoku-values-title {
    margin: 0 0 12px;
    text-align: center;
    font-size: 18px;
    font-weight: 700;
    line-height: 1.3;
    color: #1d2327;
}

.omni-sudoku-values-panel {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
    padding: 15px;
    background: #f5f5f5;
    border-radius: 8px;
}

.omni-sudoku-value-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    border: 2px solid #ddd;
    border-radius: 8px;
    background: #fff;
    font-size: 20px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s ease;
}

.omni-sudoku-game[data-type="text"] .omni-sudoku-values-panel {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    align-items: stretch;
    gap: 16px;
    padding: 20px;
}

.omni-sudoku-game[data-type="image"] .omni-sudoku-values-panel {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(78px, 1fr));
    align-items: stretch;
}

.omni-sudoku-game[data-type="text"] .omni-sudoku-value-btn {
    width: 100%;
    min-height: 76px;
    height: auto;
    padding: 12px 16px;
    aspect-ratio: auto;
    font-size: 19px;
    line-height: 1.1;
}

.omni-sudoku-game[data-type="image"] .omni-sudoku-value-btn {
    width: 100%;
    min-height: 78px;
    height: auto;
    padding: 10px;
    aspect-ratio: auto;
}

.omni-sudoku-game[data-type="text"] .omni-sudoku-btn-text {
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
}

.omni-sudoku-value-btn:hover {
    border-color: #2271b1;
    background: #f0f6fc;
}

.omni-sudoku-value-btn:active {
    transform: scale(0.95);
}

.omni-sudoku-value-btn .sudoku-btn-image {
    width: 32px;
    height: 32px;
    object-fit: contain;
}

.omni-sudoku-game[data-type="image"] .omni-sudoku-value-btn .sudoku-btn-image {
    width: 56px;
    height: 56px;
}

.omni-sudoku-clear-btn {
    background: #f8e8e8;
    border-color: #dcc;
    color: #c00;
}

.omni-sudoku-clear-btn:hover {
    background: #ffe0e0;
    border-color: #c00;
}

/* Admin Note Frontend - plain text, no decoration */
.omni-sudoku-admin-note-front {
    background: none;
    border: none;
    padding: 0;
    margin: 20px 0 0 0;
    font-size: 15px;
    line-height: 1.6;
}

/* Teacher Description - plain text, no decoration */
.omni-sudoku-teacher-desc {
    background: none;
    border: none;
    padding: 0;
    margin: 0 0 16px 0;
    font-size: 16px;
    line-height: 1.6;
}

.omni-sudoku-teacher-desc p {
    margin: 0;
}

/* Drag and Drop Styles */
.omni-sudoku-value-btn.dragging {
    opacity: 0.5;
    transform: scale(0.95);
}

.omni-sudoku-value-btn[draggable="true"] {
    cursor: grab;
}

.omni-sudoku-value-btn[draggable="true"]:active {
    cursor: grabbing;
}

.omni-sudoku-cell.drag-over {
    background: #d0e8f8 !important;
    box-shadow: inset 0 0 0 3px #2271b1;
}

/* Check Button */
.omni-check-btn {
    -webkit-appearance: none;
    appearance: none;
    background: #4f883d;
    color: #fff;
    border: none;
    padding: 0 20px;
    min-height: 46px;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    margin-right: 10px;
    transition: background 0.2s;
    line-height: 1.1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-sizing: border-box;
    box-shadow: 0 4px 6px rgba(0,0,0,.15);
}

.omni-check-btn p {
    margin: 0;
    padding: 0;
}

.omni-check-btn:hover {
    background: #3d6b2e;
}

.omni-check-btn br {
    display: none !important;
}

.omni-check-btn-label {
    display: block;
    line-height: 1;
    white-space: nowrap;
}

/* Popup Summary */
.sudoku-summary-text {
    font-size: 1.25em;
    line-height: 1.55;
}

/* Save Result Section */
.omni-save-result-section {
    max-width: 400px;
    margin: 18px auto 0;
    padding: 20px;
    background: #fdfdfd;
    border: 1px solid #eee;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    text-align: center;
}

.omni-save-checkbox-label {
    display: block;
    cursor: pointer;
    font-size: 1.1em;
    font-weight: 600;
    color: #4f883d;
}

.omni-save-checkbox-label input {
    margin-right: 8px;
    transform: scale(1.2);
    vertical-align: middle;
}

.omni-learner-name-field {
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid #e0e0e0;
}

.omni-learner-name-field > label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: #555;
    margin-bottom: 8px;
    text-align: center;
}

.omni-learner-name-input {
    width: 100%;
    padding: 18px 20px;
    font-size: 16px;
    border: 1px solid #ddd;
    border-radius: 8px;
    box-sizing: border-box;
    transition: border-color 0.2s, box-shadow 0.2s;
    min-height: 54px;
}

.omni-learner-name-input:focus {
    outline: none;
    border-color: #4f883d;
    box-shadow: 0 0 0 3px rgba(79, 136, 61, 0.15);
}

.omni-learner-name-input:read-only {
    background: #f0f0f0;
    cursor: not-allowed;
}

.omni-save-result-btn {
    display: block;
    width: 100%;
    padding: 14px 24px;
    margin: 8px 0 12px;
    background: linear-gradient(135deg, #4f883d 0%, #3e6c31 100%);
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 1.1em;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.omni-save-result-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(79, 136, 61, 0.3);
}

.omni-save-result-btn:disabled {
    opacity: 0.7;
}

.omni-save-result-btn.saved {
    background-color: #4f883d !important;
    cursor: default;
}

.omni-privacy-note {
    margin: 0 0 10px;
    font-size: 12px;
    color: #666;
}

.omni-save-result-message {
    margin-top: 15px;
    padding: 12px 16px;
    border-radius: 6px;
    font-size: 0.9em;
    font-weight: 500;
    text-align: center;
}

.omni-save-result-message.success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.omni-save-result-message.error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

@media (max-width: 600px) {
    .omni-save-result-section {
        max-width: 100%;
        padding: 15px;
    }
}

/* Fullscreen Mode */
.omni-sudoku-game-container.omni-fullscreen {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    max-width: none;
    z-index: 99999;
    background: #fff;
    display: flex;
    flex-direction: column;
    overflow: auto;
}

.omni-fullscreen .omni-sudoku-grid-wrapper {
    width: min(100%, 500px);
    max-width: 500px;
}

.omni-fullscreen .omni-sudoku-controls {
    width: min(100%, 500px);
    max-width: 500px;
}

/* Responsive */
@media (max-width: 480px) {
    .omni-sudoku-game-container {
        padding: 10px;
    }
    
    .omni-sudoku-value-btn {
        width: 40px;
        height: 40px;
        font-size: 16px;
    }
    
    .omni-sudoku-values-panel {
        gap: 5px;
        padding: 10px;
    }

    .omni-sudoku-game[data-type="text"] .omni-sudoku-value-btn {
        width: 100%;
        min-height: 52px;
        height: auto;
        padding: 8px;
        font-size: 13px;
    }

    .omni-sudoku-game[data-type="image"] .omni-sudoku-value-btn {
        width: 100%;
        min-height: 64px;
        height: auto;
        padding: 8px;
    }

    .omni-sudoku-game[data-type="image"] .omni-sudoku-value-btn .sudoku-btn-image {
        width: 44px;
        height: 44px;
    }
}