/* Sudoku WellNerd - CSS Refatorado do Zero */
/* Abordagem: Grid de Grids - Moderna e Responsiva */

/* Reset base */
#sudoku-wellnerd-container * {
    box-sizing: border-box !important;
    margin: 0 !important;
    padding: 0 !important;
}

/* Container principal */
#sudoku-wellnerd-container.sudoku-container {
    background: white !important;
    border-radius: 20px !important;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1) !important;
    padding: 30px !important;
    max-width: 600px !important;
    width: 100% !important;
    margin: 0 auto !important;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif !important;
}

/* Título */
#sudoku-wellnerd-container .sudoku-title {
    text-align: center !important;
    color: #10b981 !important;
    margin-bottom: 20px !important;
    font-size: 2.5em !important;
    font-weight: bold !important;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1) !important;
}

/* Stats */
#sudoku-wellnerd-container .sudoku-stats {
    display: flex !important;
    justify-content: space-around !important;
    margin-bottom: 20px !important;
    padding: 15px !important;
    background: #f8f9fa !important;
    border-radius: 10px !important;
}

#sudoku-wellnerd-container .stat {
    text-align: center !important;
}

#sudoku-wellnerd-container .stat-label {
    font-size: 0.9em !important;
    color: #666 !important;
    margin-bottom: 5px !important;
}

#sudoku-wellnerd-container .stat-value {
    font-size: 1.5em !important;
    font-weight: bold !important;
    color: #333 !important;
}

/* Botões de dificuldade */
#sudoku-wellnerd-container .difficulty-buttons {
    display: flex !important;
    gap: 10px !important;
    margin-bottom: 20px !important;
    flex-wrap: wrap !important;
}

#sudoku-wellnerd-container .difficulty-btn {
    flex: 1 !important;
    min-width: 100px !important;
    padding: 10px 15px !important;
    border: 2px solid #10b981 !important;
    background: white !important;
    color: #10b981 !important;
    border-radius: 8px !important;
    cursor: pointer !important;
    font-weight: 600 !important;
    transition: all 0.3s ease !important;
    font-family: inherit !important;
}

#sudoku-wellnerd-container .difficulty-btn:hover {
    background: rgba(16, 185, 129, 0.1) !important;
}

#sudoku-wellnerd-container .difficulty-btn.active {
    background: #10b981 !important;
    color: white !important;
}

/* NOVO GRID: Abordagem Grid de Grids */
#sudoku-wellnerd-container .sudoku-grid {
    display: grid !important;
    grid-template-columns: repeat(3, 1fr) !important;
    grid-template-rows: repeat(3, 1fr) !important;
    gap: 4px !important;
    background: #000 !important;
    border: 1px solid #333 !important;
    border-radius: 10px !important;
    padding: 4px !important;
    margin-bottom: 20px !important;
    aspect-ratio: 1 !important;
    max-width: 500px !important;
    width: 100% !important;
    margin-left: auto !important;
    margin-right: auto !important;
}

/* Blocos 3x3 */
.sudoku-block {
    display: grid !important;
    grid-template-columns: repeat(3, 1fr) !important;
    grid-template-rows: repeat(3, 1fr) !important;
    gap: 1px !important;
    background: #999 !important;
}

/* Células individuais */
#sudoku-wellnerd-container .sudoku-cell {
    background: white !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    font-size: 1.4em !important;
    font-weight: 600 !important;
    cursor: pointer !important;
    user-select: none !important;
    transition: all 0.2s ease !important;
    position: relative !important;
    aspect-ratio: 1 !important;
    min-height: 40px !important;
    border: none !important;
    outline: none !important;
}

/* Estados das células */
#sudoku-wellnerd-container .sudoku-cell.fixed {
    background: #f8f9fa !important;
    color: #333 !important;
    cursor: default !important;
    font-weight: 700 !important;
}

#sudoku-wellnerd-container .sudoku-cell.selected {
    background: rgba(16, 185, 129, 0.2) !important;
    color: #10b981 !important;
}

#sudoku-wellnerd-container .sudoku-cell.error {
    background: rgba(239, 68, 68, 0.2) !important;
    color: #ef4444 !important;
}

#sudoku-wellnerd-container .sudoku-cell.hint {
    animation: sudoku-pulse 0.6s ease !important;
    background: rgba(16, 185, 129, 0.3) !important;
}

@keyframes sudoku-pulse {
    0% { transform: scale(1); background: rgba(16, 185, 129, 0.3); }
    50% { transform: scale(1.1); background: rgba(16, 185, 129, 0.5); }
    100% { transform: scale(1); background: rgba(16, 185, 129, 0.3); }
}

#sudoku-wellnerd-container .sudoku-cell:hover:not(.fixed) {
    background: rgba(16, 185, 129, 0.1) !important;
}

#sudoku-wellnerd-container .sudoku-cell:focus {
    outline: 2px solid #10b981 !important;
    outline-offset: -2px !important;
}

/* Controles */
#sudoku-wellnerd-container .sudoku-controls {
    display: flex !important;
    gap: 10px !important;
    flex-wrap: wrap !important;
    margin-bottom: 20px !important;
}

#sudoku-wellnerd-container .sudoku-btn {
    flex: 1 !important;
    min-width: 120px !important;
    padding: 12px 20px !important;
    border: none !important;
    background: #10b981 !important;
    color: white !important;
    border-radius: 8px !important;
    cursor: pointer !important;
    font-weight: 600 !important;
    font-size: 1em !important;
    transition: all 0.3s ease !important;
    font-family: inherit !important;
}

#sudoku-wellnerd-container .sudoku-btn:hover {
    background: #059669 !important;
    transform: translateY(-2px) !important;
    box-shadow: 0 5px 15px rgba(16, 185, 129, 0.3) !important;
}

#sudoku-wellnerd-container .sudoku-btn:active {
    transform: translateY(0) !important;
}

#sudoku-wellnerd-container .sudoku-btn:disabled {
    background: #d1d5db !important;
    cursor: not-allowed !important;
    transform: none !important;
    box-shadow: none !important;
}

#sudoku-wellnerd-container .sudoku-btn.secondary {
    background: #6b7280 !important;
}

#sudoku-wellnerd-container .sudoku-btn.secondary:hover {
    background: #4b5563 !important;
}

/* Modal */
.sudoku-modal {
    display: none !important;
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    width: 100% !important;
    height: 100% !important;
    background: rgba(0, 0, 0, 0.5) !important;
    justify-content: center !important;
    align-items: center !important;
    z-index: 10000 !important;
}

.sudoku-modal.active {
    display: flex !important;
}

.sudoku-modal-content {
    background: white !important;
    padding: 40px !important;
    border-radius: 20px !important;
    text-align: center !important;
    max-width: 400px !important;
    animation: sudoku-slideIn 0.3s ease !important;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3) !important;
}

@keyframes sudoku-slideIn {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.sudoku-modal h2 {
    color: #10b981 !important;
    margin-bottom: 20px !important;
    font-size: 2em !important;
}

.sudoku-modal p {
    margin-bottom: 10px !important;
    color: #666 !important;
    font-size: 1.1em !important;
}

.sudoku-modal .sudoku-btn {
    margin-top: 20px !important;
}

/* Responsividade */
@media (max-width: 768px) {
    #sudoku-wellnerd-container.sudoku-container {
        padding: 20px !important;
        margin: 10px !important;
    }

    #sudoku-wellnerd-container .sudoku-title {
        font-size: 2em !important;
    }

    #sudoku-wellnerd-container .sudoku-grid {
        max-width: 90vw !important;
        gap: 3px !important;
        border-width: 3px !important;
        padding: 3px !important;
    }

    #sudoku-wellnerd-container .sudoku-cell {
        font-size: 1.2em !important;
        min-height: 35px !important;
    }

    #sudoku-wellnerd-container .difficulty-buttons {
        flex-direction: column !important;
    }

    #sudoku-wellnerd-container .sudoku-controls {
        flex-direction: column !important;
    }

    #sudoku-wellnerd-container .sudoku-btn {
        width: 100% !important;
        min-width: auto !important;
    }

    .sudoku-modal-content {
        margin: 20px !important;
        padding: 30px !important;
    }
}

@media (max-width: 480px) {
    #sudoku-wellnerd-container .sudoku-grid {
        gap: 2px !important;
        border-width: 2px !important;
        padding: 2px !important;
    }

    .sudoku-block {
        gap: 0.5px !important;
    }

    #sudoku-wellnerd-container .sudoku-cell {
        font-size: 1em !important;
        min-height: 30px !important;
    }
}

/* Melhorias de acessibilidade */
@media (prefers-reduced-motion: reduce) {
    #sudoku-wellnerd-container .sudoku-cell,
    #sudoku-wellnerd-container .sudoku-btn,
    .sudoku-modal-content {
        transition: none !important;
        animation: none !important;
    }
}

/* Tema escuro (se o usuário preferir) */
@media (prefers-color-scheme: dark) {
    #sudoku-wellnerd-container.sudoku-container {
        background: #1f2937 !important;
        color: white !important;
    }
    
    #sudoku-wellnerd-container .sudoku-cell {
        background: #374151 !important;
        color: white !important;
    }
    
    #sudoku-wellnerd-container .sudoku-cell.fixed {
        background: #4b5563 !important;
    }
    
    #sudoku-wellnerd-container .sudoku-stats {
        background: #374151 !important;
    }
}