.omni-kostra-game {
    display: flex;
    flex-direction: column;
    gap: 12px;
    font-family: inherit;
    width: 100%;
    background: #ffffff;
}

/* Toolbar uses .omni-game-toolbar from core/assets/css/frontend-controls.css */

.omni-kostra-status {
    background: #f9fafb;
    border: 1px solid #e5e7eb;
    border-radius: 12px;
    padding: 14px 18px;
    font-size: 1rem;
    font-weight: 600;
    color: #1f2937;
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

 .omni-kostra-status-text {
    flex: 1 1 auto;
    min-width: 220px;
 }

 .omni-kostra-status-actions {
    margin-left: auto;
    display: inline-flex;
    align-items: center;
    gap: 10px;
 }

 .omni-kostra-undo {
    padding: 8px 14px;
    border: 2px solid #6b7280;
    background: #ffffff;
    color: #374151;
    border-radius: 999px;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 700;
    transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
    white-space: nowrap;
 }

 .omni-kostra-undo:hover {
    background: #6b7280;
    border-color: #6b7280;
    color: #ffffff;
 }

 .omni-kostra-undo:disabled {
    opacity: 0.5;
    cursor: not-allowed;
 }

 .omni-kostra-check {
    padding: 8px 14px;
    border: 2px solid #4f883d;
    background: #ffffff;
    color: #4f883d;
    border-radius: 999px;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 700;
    transition: background 0.2s ease, color 0.2s ease;
    white-space: nowrap;
 }

 .omni-kostra-check:hover {
    background: #4f883d;
    color: #ffffff;
 }

.omni-kostra-board-wrapper {
    position: relative;
    border: 1px solid #d4d4d8;
    border-radius: 12px;
    overflow: hidden;
    background: #f8fafc;
    width: 100%;
    padding: 2px;
}


.omni-kostra-board {
    width: 100%;
}

.omni-kostra-board-layout {
    display: grid;
    grid-template-columns: auto 1fr;
    grid-template-rows: auto 1fr;
    column-gap: 4px;
    row-gap: 4px;
    align-items: stretch;
}

.omni-kostra-axis-corner {
    grid-column: 1;
    grid-row: 1;
    width: 32px;
    height: 28px;
}

.omni-kostra-axis {
    font-size: 0.8rem;
    font-weight: 600;
    color: #4b5563;
    text-transform: uppercase;
}

.omni-kostra-axis-top {
    grid-column: 2;
    grid-row: 1;
    display: grid;
    gap: 2px;
    background: #f9fafb;
    border-radius: 6px;
    padding: 2px 4px;
}

.omni-kostra-axis-top span {
    text-align: center;
    padding: 0 1px;
    line-height: 1.1;
}

.omni-kostra-axis-left {
    grid-column: 1;
    grid-row: 2;
    display: grid;
    gap: 2px;
    background: #f9fafb;
    border-radius: 6px;
    padding: 2px 0;
    text-transform: none;
    min-width: 32px;
}

.omni-kostra-axis-left span {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 2px;
    font-weight: 600;
    text-transform: none;
    line-height: 1.1;
}

.omni-kostra-board-canvas {
    grid-column: 2;
    grid-row: 2;
    position: relative;
    aspect-ratio: 1 / 1;
    width: 100%;
}

.omni-kostra-grid {
    display: grid;
    grid-template-rows: repeat(var(--rows), 1fr);
    grid-template-columns: repeat(var(--cols), 1fr);
    width: 100%;
    height: 100%;
    position: absolute;
    inset: 0;
}

.omni-kostra-cell {
    border: 1px solid rgba(148, 163, 184, 0.35);
    background: rgba(255, 255, 255, 0.85);
    padding: 0;
    cursor: crosshair;
    transition: background 0.15s ease;
}

.omni-kostra-cell:hover {
    background: rgba(59, 130, 246, 0.12);
}

.omni-kostra-cell.is-hint {
    background: rgba(250, 204, 21, 0.35);
}

.omni-kostra-cell.is-error {
    animation: omni-kostra-error 0.45s ease;
}

.omni-kostra-cell.is-preview-valid {
    background: rgba(34, 197, 94, 0.35);
}

.omni-kostra-cell.is-preview-invalid {
    background: rgba(239, 68, 68, 0.35);
}

@keyframes omni-kostra-error {
    0% { background: rgba(248, 113, 113, 0.7); }
    100% { background: rgba(255, 255, 255, 0.85); }
}

.omni-kostra-overlay {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.omni-kostra-overlay line {
    pointer-events: none;
}

.omni-kostra-overlay .omni-kostra-start {
    pointer-events: auto;
    cursor: pointer;
}

.omni-kostra-legend {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.omni-kostra-legend-item {
    border: 1px solid #e5e7eb;
    border-radius: 12px;
    padding: 14px 16px;
    background: #ffffff;
    box-shadow: 0 2px 6px rgba(15, 23, 42, 0.06);
    cursor: pointer;
    transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
    outline: none;
}

.omni-kostra-legend-item.is-selectable:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(15, 23, 42, 0.08);
}

.omni-kostra-legend-item.is-active {
    border-color: #2563eb;
    box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.2);
}

.omni-kostra-legend-item.is-complete {
    opacity: 0.85;
}

.omni-kostra-legend-item:focus-visible {
    outline: 2px solid #2563eb;
    outline-offset: 2px;
}

.omni-kostra-legend-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 10px;
}

.omni-kostra-legend-color {
    width: 18px;
    height: 18px;
    border-radius: 6px;
    border: 1px solid rgba(17, 24, 39, 0.18);
    flex-shrink: 0;
}

.omni-kostra-legend-label {
    font-weight: 700;
    font-size: 0.95rem;
    flex: 1;
    color: #111827;
}

.omni-kostra-legend-status {
    font-size: 0.85rem;
    font-weight: 600;
    color: #6b7280;
}

.omni-kostra-legend-item.is-complete .omni-kostra-legend-status {
    color: #059669;
}

.omni-kostra-legend-moves {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.omni-kostra-legend-move {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 10px;
    border-radius: 9999px;
    background: #eef2ff;
    font-size: 0.9rem;
    color: #1f2937;
}

.omni-kostra-legend-move.is-next {
    background: #dbeafe;
    font-weight: 700;
    color: #1f2937;
}

.omni-kostra-legend-move.is-done {
    background: #e2e8f0;
    color: #4b5563;
}

.omni-kostra-move-arrow {
    font-size: 1.05rem;
    line-height: 1;
}

.omni-kostra-legend-empty {
    font-size: 0.9rem;
    color: #6b7280;
}

.omni-kostra-game.is-completed .omni-kostra-status {
    color: #047857;
}

.omni-kostra-game.is-fullscreen {
    height: 100%;
    background: #ffffff;
}

.omni-kostra-game.is-fullscreen .omni-kostra-board-wrapper {
    max-width: 90vmin;
    margin: 0 auto;
}

.omni-kostra-game.is-fullscreen .omni-kostra-legend {
    max-height: 40vh;
    overflow: auto;
}

@media (min-width: 960px) {
    .omni-kostra-board-wrapper {
        max-width: 720px;
        margin: 0 auto;
    }
}

.omni-kostra-modal {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.45);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
    z-index: 9999;
}

.omni-kostra-modal.is-visible {
    opacity: 1;
    pointer-events: auto;
}

.omni-kostra-modal__dialog {
    background: #ffffff;
    border-radius: 16px;
    padding: 32px 36px;
    max-width: 420px;
    width: calc(100% - 32px);
    text-align: center;
    box-shadow: 0 20px 50px rgba(15, 23, 42, 0.18);
}

.omni-kostra-modal__title {
    font-size: 1.5rem;
    font-weight: 700;
    color: #111827;
    margin-bottom: 12px;
}

.omni-kostra-modal__text {
    font-size: 1rem;
    color: #1f2937;
    margin-bottom: 24px;
}

.omni-kostra-modal__time {
    font-weight: 700;
    color: #2563eb;
}

.omni-kostra-modal__actions {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}

.omni-kostra-modal__btn {
    background: #4f883d;
    border: none;
    color: #ffffff;
    padding: 10px 24px;
    border-radius: 999px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    transition: background 0.2s ease;
}

.omni-kostra-modal__btn:hover {
    background: #3e6c31;
}

.omni-kostra-modal__btn--outline {
    background: #ffffff;
    color: #4f883d;
    border: 2px solid #4f883d;
}

.omni-kostra-modal__btn--outline:hover {
    background: #3e6c31;
    color: #ffffff;
}

 .omni-kostra-modal--has-save .omni-kostra-modal__dialog {
    max-width: 680px;
 }

 .omni-kostra-modal__teacher-note {
    margin: 14px 0 6px;
    font-size: 16px;
    line-height: 1.45;
    color: #1b1b1b;
 }

 .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;
    line-height: 1.45;
    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,
 .omni-learner-name-input:disabled {
    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.saved {
    background-color: #4f883d !important;
    cursor: default;
 }

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

 .omni-privacy-note {
    margin: 0 0 10px;
    font-size: 12px;
    color: #1e1e1e;
    font-style: italic;
    text-align: center;
 }

 .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;
    }
 }

.omni-kostra-game:fullscreen {
    background: #ffffff;
}