/* Hitori Game Styles */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary-color: #64748b;
    --success-color: #22c55e;
    --error-color: #ef4444;
    --warning-color: #f59e0b;

    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --text-color: #1e293b;
    --text-muted: #64748b;

    --cell-bg: #ffffff;
    --cell-painted: #334155;
    --cell-painted-text: #94a3b8;
    --cell-error: #fecaca;
    --cell-hint: #fef08a;
    --cell-tag1: #22c55e;
    --cell-tag2: #3b82f6;
    --cell-border: #cbd5e1;

    --board-gap: 2px;
    --cell-size: 60px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 800px;
    margin: 0 auto;
}

header {
    text-align: center;
    margin-bottom: 24px;
}

header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 4px;
}

header .subtitle {
    color: var(--text-muted);
    font-size: 1rem;
}

.game-info {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 24px;
    margin-bottom: 20px;
}

.timer {
    font-size: 2rem;
    font-weight: 600;
    font-family: 'Courier New', monospace;
    color: var(--text-color);
    background: var(--card-bg);
    padding: 8px 16px;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.stats {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.game-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
    margin-bottom: 24px;
}

@media (min-width: 768px) {
    .game-container {
        flex-direction: row;
        align-items: flex-start;
        justify-content: center;
    }
}

.board-wrapper {
    background: var(--card-bg);
    padding: 16px;
    border-radius: 12px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.board {
    display: grid;
    gap: var(--board-gap);
    background: var(--cell-border);
    padding: var(--board-gap);
    border-radius: 4px;
}

.cell {
    width: var(--cell-size);
    height: var(--cell-size);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 600;
    background: var(--cell-bg);
    border-radius: 4px;
    cursor: pointer;
    position: relative;
    transition: all 0.15s ease;
    user-select: none;
}

.cell:hover {
    transform: scale(1.05);
    z-index: 1;
}

.cell.painted {
    background: var(--cell-painted);
    color: var(--cell-painted-text);
    font-size: 1rem;
}

.cell.error {
    background: var(--cell-error);
}

.cell.painted.error {
    background: linear-gradient(135deg, var(--cell-painted) 50%, var(--error-color) 50%);
}

.cell.hint {
    animation: pulse-hint 0.5s ease-in-out infinite alternate;
}

@keyframes pulse-hint {
    from { box-shadow: 0 0 0 2px var(--warning-color); }
    to { box-shadow: 0 0 0 4px var(--warning-color); }
}

.cell .tag {
    position: absolute;
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.cell .tag1 {
    top: 4px;
    right: 4px;
    background: var(--cell-tag1);
}

.cell .tag2 {
    bottom: 4px;
    right: 4px;
    background: var(--cell-tag2);
}

.controls {
    display: flex;
    flex-direction: column;
    gap: 12px;
    min-width: 160px;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.control-group label {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.control-group select {
    padding: 8px 12px;
    border: 1px solid var(--cell-border);
    border-radius: 6px;
    font-size: 1rem;
    background: var(--card-bg);
    cursor: pointer;
}

.control-row {
    display: flex;
    gap: 8px;
}

.control-row .btn {
    flex: 1;
}

.btn {
    padding: 10px 16px;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s ease;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
}

.btn-primary:hover:not(:disabled) {
    background: var(--primary-hover);
}

.btn-secondary {
    background: var(--secondary-color);
    color: white;
}

.btn-secondary:hover:not(:disabled) {
    background: #475569;
}

.btn:not(.btn-primary):not(.btn-secondary) {
    background: var(--card-bg);
    border: 1px solid var(--cell-border);
    color: var(--text-color);
}

.btn:not(.btn-primary):not(.btn-secondary):hover:not(:disabled) {
    background: var(--bg-color);
}

.rules {
    background: var(--card-bg);
    padding: 16px 20px;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.rules h3 {
    font-size: 1rem;
    margin-bottom: 8px;
    color: var(--text-color);
}

.rules ol {
    margin-left: 20px;
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.6;
}

.rules .tip {
    margin-top: 12px;
    font-size: 0.85rem;
    color: var(--text-muted);
    padding-top: 12px;
    border-top: 1px solid var(--cell-border);
}

.message {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 500;
    z-index: 100;
    animation: slide-up 0.3s ease;
}

@keyframes slide-up {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}

.message.success {
    background: var(--success-color);
    color: white;
}

.message.error {
    background: var(--error-color);
    color: white;
}

.message.info {
    background: var(--primary-color);
    color: white;
}

.hidden {
    display: none !important;
}

.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 200;
}

.modal-content {
    background: var(--card-bg);
    padding: 32px 48px;
    border-radius: 16px;
    text-align: center;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    animation: pop-in 0.3s ease;
}

@keyframes pop-in {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.modal-content h2 {
    color: var(--success-color);
    margin-bottom: 16px;
    font-size: 1.75rem;
}

.modal-content p {
    color: var(--text-muted);
    margin-bottom: 8px;
}

.modal-content .btn {
    margin-top: 16px;
}

/* Responsive cell sizes */
@media (max-width: 500px) {
    :root {
        --cell-size: 48px;
    }

    .cell {
        font-size: 1.25rem;
    }

    .cell.painted {
        font-size: 0.85rem;
    }
}

/* Loading state */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 24px;
    height: 24px;
    margin: -12px 0 0 -12px;
    border: 3px solid var(--cell-border);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}