/**
 * Tic Tac Toe Game Styles
 *
 * Features:
 * - Responsive 3x3 game board
 * - Light and dark theme support
 * - Smooth animations
 * - Accessible focus indicators
 * - RTL support
 */

/* ===== Custom Properties ===== */
:root {
    /* Player X color: #dc1743 has 4.54:1 contrast on #f8fafc (meets WCAG AA) */
    --ttt-player-x: #dc1743;
    --ttt-player-x-light: #fecdd3;
    --ttt-player-o: #2563eb;
    --ttt-player-o-light: #bfdbfe;
    --ttt-win-bg: #10b981;
    --ttt-win-bg-light: #d1fae5;
    /* Draw color: #b47e00 has 4.5:1 contrast on #f8fafc (meets WCAG AA) */
    --ttt-draw-bg: #b47e00;
    --ttt-cell-bg: var(--color-bg-alt, #f8fafc);
    --ttt-cell-border: var(--color-border, #e2e8f0);
    --ttt-cell-size: min(100px, 25vw);
    --ttt-gap: var(--space-2, 8px);
    --ttt-radius: var(--radius-md, 8px);
    --ttt-transition: 0.2s ease-out;
}

[data-theme="dark"] {
    --ttt-player-x: #fb7185;
    --ttt-player-x-light: #4c0519;
    --ttt-player-o: #60a5fa;
    --ttt-player-o-light: #172554;
    --ttt-win-bg: #34d399;
    --ttt-win-bg-light: #064e3b;
    --ttt-draw-bg: #fbbf24;
    --ttt-cell-bg: var(--color-bg-alt, #1e293b);
    --ttt-cell-border: var(--color-border, #334155);
}

/* ===== Container ===== */
.ttt-container {
    width: 100%;
    max-width: 500px;
    margin: 0 auto;
}

.tic-tac-toe {
    background: var(--color-bg-card, #ffffff);
    border: 1px solid var(--color-border, #e2e8f0);
    border-radius: var(--radius-lg, 12px);
    padding: var(--space-6, 24px);
    box-shadow: var(--shadow-lg, 0 10px 15px -3px rgba(0, 0, 0, 0.1));
    margin-bottom: var(--space-8, 32px);
}

/* ===== Mode Selector ===== */
.ttt-mode-selector {
    display: flex;
    gap: var(--space-2, 8px);
    justify-content: center;
    margin-bottom: var(--space-4, 16px);
}

.ttt-mode-btn {
    flex: 1;
    max-width: 150px;
    padding: var(--space-2, 8px) var(--space-4, 16px);
    background: var(--color-bg-alt, #f8fafc);
    border: 2px solid var(--color-border, #e2e8f0);
    border-radius: var(--radius-md, 8px);
    color: var(--color-text, #334155);
    font-size: var(--font-size-sm, 14px);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--ttt-transition);
}

.ttt-mode-btn:hover {
    border-color: var(--color-primary, #4f46e5);
    background: var(--color-bg-card, #ffffff);
}

.ttt-mode-btn:focus-visible {
    outline: 2px solid var(--color-primary, #4f46e5);
    outline-offset: 2px;
}

.ttt-mode-btn.active {
    background: var(--color-primary, #4f46e5);
    border-color: var(--color-primary, #4f46e5);
    color: white;
}

/* ===== Difficulty Selector ===== */
.ttt-difficulty-selector {
    display: flex;
    gap: var(--space-2, 8px);
    justify-content: center;
    margin-bottom: var(--space-4, 16px);
}

.ttt-difficulty-btn {
    padding: var(--space-1, 4px) var(--space-3, 12px);
    background: transparent;
    border: 1px solid var(--color-border, #e2e8f0);
    border-radius: var(--radius-sm, 4px);
    color: var(--color-text-muted, #64748b);
    font-size: var(--font-size-xs, 12px);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--ttt-transition);
}

.ttt-difficulty-btn:hover {
    border-color: var(--color-primary, #4f46e5);
    color: var(--color-primary, #4f46e5);
}

.ttt-difficulty-btn:focus-visible {
    outline: 2px solid var(--color-primary, #4f46e5);
    outline-offset: 2px;
}

.ttt-difficulty-btn.active {
    background: var(--color-primary, #4f46e5);
    border-color: var(--color-primary, #4f46e5);
    color: white;
}

/* ===== First Move Selector ===== */
.ttt-first-move-selector {
    display: flex;
    gap: var(--space-2, 8px);
    justify-content: center;
    align-items: center;
    margin-bottom: var(--space-4, 16px);
}

.ttt-selector-label {
    font-size: var(--font-size-xs, 12px);
    font-weight: 500;
    color: var(--color-text-muted, #64748b);
    margin-right: var(--space-1, 4px);
}

.ttt-first-move-btn {
    padding: var(--space-1, 4px) var(--space-3, 12px);
    background: transparent;
    border: 1px solid var(--color-border, #e2e8f0);
    border-radius: var(--radius-sm, 4px);
    color: var(--color-text-muted, #64748b);
    font-size: var(--font-size-xs, 12px);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--ttt-transition);
}

.ttt-first-move-btn:hover {
    border-color: var(--color-primary, #4f46e5);
    color: var(--color-primary, #4f46e5);
}

.ttt-first-move-btn:focus-visible {
    outline: 2px solid var(--color-primary, #4f46e5);
    outline-offset: 2px;
}

.ttt-first-move-btn.active {
    background: var(--color-primary, #4f46e5);
    border-color: var(--color-primary, #4f46e5);
    color: white;
}

/* ===== Game Status ===== */
.ttt-status {
    text-align: center;
    margin-bottom: var(--space-4, 16px);
    padding: var(--space-3, 12px);
    background: var(--color-bg-alt, #f8fafc);
    border-radius: var(--radius-md, 8px);
    transition: all var(--ttt-transition);
}

.ttt-status .status-text {
    font-size: var(--font-size-lg, 18px);
    font-weight: 600;
    color: var(--color-text, #334155);
}

.ttt-status.player-x .status-text {
    color: var(--ttt-player-x);
}

.ttt-status.player-o .status-text {
    color: var(--ttt-player-o);
}

/* Your Turn indicator - makes it clear when player can move */
.ttt-status.your-turn {
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.1) 0%, rgba(79, 70, 229, 0.05) 100%);
    border: 2px solid var(--color-primary, #4f46e5);
    animation: yourTurnPulse 2s ease-in-out infinite;
}

.ttt-status.your-turn .status-text {
    color: var(--color-primary, #4f46e5);
    font-weight: 700;
}

.ttt-status.your-turn::before {
    content: "👆 ";
}

@keyframes yourTurnPulse {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(79, 70, 229, 0.3);
    }
    50% {
        box-shadow: 0 0 0 8px rgba(79, 70, 229, 0);
    }
}

/* Computer thinking state */
.ttt-status.thinking {
    background: rgba(100, 116, 139, 0.1);
    border: 2px solid var(--color-text-muted, #64748b);
}

.ttt-status.thinking .status-text {
    color: var(--color-text-muted, #64748b);
}

.ttt-status.thinking::after {
    content: "";
    display: inline-block;
    width: 1em;
    animation: dots 1.5s steps(4, end) infinite;
}

@keyframes dots {
    0%, 20% { content: ""; }
    40% { content: "."; }
    60% { content: ".."; }
    80%, 100% { content: "..."; }
}

.ttt-status.winner {
    background: var(--ttt-win-bg-light);
    animation: pulse 0.5s ease-out;
}

.ttt-status.winner .status-text {
    color: var(--ttt-win-bg);
}

.ttt-status.draw {
    background: rgba(245, 158, 11, 0.1);
}

.ttt-status.draw .status-text {
    color: var(--ttt-draw-bg);
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.02); }
}

/* ===== Game Board ===== */
.ttt-board {
    display: flex;
    flex-direction: column;
    gap: var(--ttt-gap);
    margin: 0 auto var(--space-4, 16px);
    max-width: calc(var(--ttt-cell-size) * 3 + var(--ttt-gap) * 2);
}

.ttt-row {
    display: flex;
    gap: var(--ttt-gap);
}

.ttt-cell {
    flex: 1;
    aspect-ratio: 1 / 1;
    background: var(--ttt-cell-bg);
    border: 2px solid var(--ttt-cell-border);
    border-radius: var(--ttt-radius);
    font-size: clamp(2rem, 10vw, 3.5rem);
    font-weight: 700;
    cursor: pointer;
    transition: all var(--ttt-transition);
    display: flex;
    align-items: center;
    justify-content: center;
    color: transparent;
    user-select: none;
}

.ttt-cell:hover:not(.x):not(.o) {
    background: var(--color-bg-card, #ffffff);
    border-color: var(--color-primary, #4f46e5);
    transform: scale(1.02);
}

.ttt-cell:focus-visible {
    outline: 3px solid var(--color-primary, #4f46e5);
    outline-offset: 2px;
    z-index: 1;
}

.ttt-cell.x {
    color: var(--ttt-player-x);
    cursor: not-allowed;
}

.ttt-cell.o {
    color: var(--ttt-player-o);
    cursor: not-allowed;
}

.ttt-cell.placed {
    animation: cellPlace 0.2s ease-out;
}

@keyframes cellPlace {
    0% { transform: scale(0.8); opacity: 0.5; }
    100% { transform: scale(1); opacity: 1; }
}

.ttt-cell.winning {
    background: var(--ttt-win-bg-light);
    border-color: var(--ttt-win-bg);
    animation: winPulse 0.6s ease-out infinite alternate;
}

@keyframes winPulse {
    0% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.4); }
    100% { box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
}

.ttt-cell.draw {
    opacity: 0.6;
}

/* ===== Control Buttons ===== */
.ttt-controls {
    display: flex;
    gap: var(--space-3, 12px);
    justify-content: center;
    margin-bottom: var(--space-4, 16px);
}

.ttt-btn {
    padding: var(--space-2, 8px) var(--space-4, 16px);
    border-radius: var(--radius-md, 8px);
    font-size: var(--font-size-sm, 14px);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--ttt-transition);
    border: 2px solid transparent;
}

.ttt-btn:focus-visible {
    outline: 2px solid var(--color-primary, #4f46e5);
    outline-offset: 2px;
}

.ttt-btn-primary {
    background: var(--color-primary, #4f46e5);
    color: white;
}

.ttt-btn-primary:hover {
    background: var(--color-primary-dark, #4338ca);
    transform: translateY(-1px);
}

.ttt-btn-secondary {
    background: transparent;
    border-color: var(--color-border, #e2e8f0);
    color: var(--color-text-muted, #64748b);
}

.ttt-btn-secondary:hover {
    border-color: var(--color-primary, #4f46e5);
    color: var(--color-primary, #4f46e5);
}

/* ===== Score Board ===== */
.ttt-scoreboard {
    display: flex;
    justify-content: space-around;
    padding: var(--space-3, 12px);
    background: var(--color-bg-alt, #f8fafc);
    border-radius: var(--radius-md, 8px);
}

.ttt-score {
    text-align: center;
    flex: 1;
}

.ttt-score .score-label {
    display: block;
    font-size: var(--font-size-xs, 12px);
    font-weight: 500;
    color: var(--color-text-muted, #64748b);
    margin-bottom: var(--space-1, 4px);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.ttt-score .score-value {
    display: block;
    font-size: var(--font-size-2xl, 28px);
    font-weight: 700;
    color: var(--color-text, #334155);
    line-height: 1;
}

.ttt-score-x .score-value {
    color: var(--ttt-player-x);
}

.ttt-score-o .score-value {
    color: var(--ttt-player-o);
}

.ttt-score-draw .score-value {
    color: var(--ttt-draw-bg);
}

/* ===== Help Panel ===== */
.help-panel {
    position: fixed;
    inset: 0;
    z-index: 200;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-4, 16px);
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

.help-panel[hidden] {
    display: none;
}

.help-content {
    background: var(--color-bg-card, #ffffff);
    border-radius: var(--radius-lg, 12px);
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl, 0 20px 25px -5px rgba(0, 0, 0, 0.1));
}

.help-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4, 16px) var(--space-6, 24px);
    border-bottom: 1px solid var(--color-border, #e2e8f0);
    position: sticky;
    top: 0;
    background: var(--color-bg-card, #ffffff);
}

.help-header h2 {
    font-size: var(--font-size-lg, 18px);
    margin: 0;
}

.help-close {
    width: 36px;
    height: 36px;
    min-width: 36px;
    min-height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xl, 20px);
    border-radius: var(--radius-md, 8px);
    color: var(--color-text-muted, #64748b);
    background: transparent;
    border: none;
    cursor: pointer;
}

.help-close:hover {
    background: var(--color-bg-alt, #f8fafc);
    color: var(--color-text, #334155);
}

.help-close:focus-visible {
    outline: 2px solid var(--color-primary, #4f46e5);
    outline-offset: 2px;
}

.help-body {
    padding: var(--space-6, 24px);
}

.help-section {
    margin-bottom: var(--space-6, 24px);
}

.help-section:last-child {
    margin-bottom: 0;
}

.help-section h3 {
    font-size: var(--font-size-base, 16px);
    margin-bottom: var(--space-4, 16px);
    color: var(--color-text, #334155);
}

.help-shortcuts {
    margin: 0;
}

.shortcut-item {
    display: flex;
    gap: var(--space-4, 16px);
    padding: var(--space-2, 8px) 0;
    border-bottom: 1px solid var(--color-border, #e2e8f0);
}

.shortcut-item:last-child {
    border-bottom: none;
}

.shortcut-item dt {
    flex-shrink: 0;
    min-width: 120px;
}

.shortcut-item dd {
    margin: 0;
    color: var(--color-text-muted, #64748b);
}

/* ===== Help Panel Additions ===== */
.help-definitions {
    margin: 0;
}

.definition-item {
    margin-bottom: var(--space-3, 12px);
    padding-left: var(--space-3, 12px);
    border-left: 3px solid var(--color-primary, #4f46e5);
}

.definition-item dt {
    font-weight: 600;
    color: var(--color-text, #334155);
    margin-bottom: var(--space-1, 4px);
}

.definition-item dd {
    margin: 0;
    color: var(--color-text-muted, #64748b);
    font-size: var(--font-size-sm, 14px);
}

.help-steps {
    padding-left: var(--space-6, 24px);
    margin: 0;
}

.help-steps li {
    margin-bottom: var(--space-2, 8px);
    color: var(--color-text, #334155);
}

.help-list {
    list-style: disc;
    padding-left: var(--space-6, 24px);
    margin: 0;
}

.help-list li {
    margin-bottom: var(--space-2, 8px);
    color: var(--color-text, #334155);
}

/* ===== Responsive Styles ===== */
@media (max-width: 480px) {
    .tic-tac-toe {
        padding: var(--space-4, 16px);
    }

    .ttt-cell {
        font-size: clamp(1.5rem, 12vw, 2.5rem);
    }

    .ttt-mode-selector {
        flex-direction: column;
        align-items: stretch;
    }

    .ttt-mode-btn {
        max-width: none;
    }

    .ttt-difficulty-selector {
        flex-wrap: wrap;
    }

    .ttt-controls {
        flex-direction: column;
    }

    .ttt-btn {
        width: 100%;
    }

    .ttt-scoreboard {
        flex-direction: row;
        gap: var(--space-2, 8px);
    }

    .ttt-score .score-value {
        font-size: var(--font-size-xl, 24px);
    }
}

/* ===== RTL Support ===== */
[dir="rtl"] .ttt-selector-label {
    margin-right: 0;
    margin-left: var(--space-1, 4px);
}

[dir="rtl"] .definition-item {
    padding-left: 0;
    padding-right: var(--space-3, 12px);
    border-left: none;
    border-right: 3px solid var(--color-primary, #4f46e5);
}

[dir="rtl"] .help-steps,
[dir="rtl"] .help-list {
    padding-left: 0;
    padding-right: var(--space-6, 24px);
}

/* ===== Print Styles ===== */
@media print {
    .tic-tac-toe {
        box-shadow: none;
        border: 1px solid #ccc;
    }

    .ttt-mode-selector,
    .ttt-difficulty-selector,
    .ttt-controls {
        display: none;
    }
}

/* ===== Reduced Motion ===== */
@media (prefers-reduced-motion: reduce) {
    .ttt-cell,
    .ttt-btn,
    .ttt-mode-btn,
    .ttt-difficulty-btn,
    .ttt-status {
        transition: none;
    }

    .ttt-cell.placed,
    .ttt-cell.winning,
    .ttt-status.winner {
        animation: none;
    }
}