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

:root {
    /* Default theme */
    --bg-color: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --container-bg: rgba(255, 255, 255, 0.95);
    --text-color: #2d3748;
    --header-color: #4a5568;
    --primary-color: #667eea;
    --secondary-color: #f093fb;
    --cell-bg: rgba(255, 255, 255, 0.8);
    --cell-hover: rgba(102, 126, 234, 0.1);
    --score-bg: rgba(255, 255, 255, 0.6);
    --winner-color: rgba(46, 204, 113, 0.5);
    --shadow-color: rgba(0, 0, 0, 0.15);
    --button-bg: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --button-hover: linear-gradient(135deg, #5a67d8 0%, #6b46c1 100%);
    --history-bg: rgba(255, 255, 255, 0.6);
    --border-color: rgba(102, 126, 234, 0.2);
    --modal-bg: rgba(255, 255, 255, 0.98);
    --modal-header: rgba(255, 255, 255, 0.9);
    --modal-footer: rgba(255, 255, 255, 0.9);
    --transition-time: 0.3s;
}

/* Dark Theme */
body.dark-theme {
    --bg-color: #121212;
    --container-bg: #1e1e1e;
    --text-color: #f5f5f5;
    --header-color: #4a6fa5;
    --cell-bg: #2c2c2c;
    --cell-hover: #3c3c3c;
    --score-bg: #2c2c2c;
    --shadow-color: rgba(0, 0, 0, 0.3);
    --history-bg: #2c2c2c;
    --border-color: #444;
    --modal-bg: #1e1e1e;
    --modal-header: #2c2c2c;
    --modal-footer: #2c2c2c;
}

/* Neon Theme */
body.neon-theme {
    --bg-color: #0f0f1a;
    --container-bg: #1a1a2e;
    --text-color: #fff;
    --header-color: #ff00ff;
    --primary-color: #00ffff;
    --secondary-color: #ff00ff;
    --cell-bg: #16213e;
    --cell-hover: #1a1a4a;
    --score-bg: #16213e;
    --winner-color: rgba(0, 255, 255, 0.5);
    --shadow-color: rgba(0, 255, 255, 0.2);
    --button-bg: #ff00ff;
    --button-hover: #cc00cc;
    --history-bg: #16213e;
    --border-color: #00ffff;
    --modal-bg: #1a1a2e;
    --modal-header: #16213e;
    --modal-footer: #16213e;
}

/* Pastel Theme */
body.pastel-theme {
    --bg-color: #f9f7f7;
    --container-bg: #fff;
    --text-color: #555;
    --header-color: #a6a6d5;
    --primary-color: #a6d5a6;
    --secondary-color: #d5a6a6;
    --cell-bg: #f0e6f6;
    --cell-hover: #e6d5f0;
    --score-bg: #f0e6f6;
    --winner-color: rgba(166, 213, 166, 0.5);
    --shadow-color: rgba(166, 166, 213, 0.2);
    --button-bg: #d5a6a6;
    --button-hover: #c99595;
    --history-bg: #f0e6f6;
    --border-color: #e6e6f0;
    --modal-bg: #fff;
    --modal-header: #f0e6f6;
    --modal-footer: #f0e6f6;
}

/* Retro Theme */
body.retro-theme {
    --bg-color: #d3b17d;
    --container-bg: #e8d0a9;
    --text-color: #3a3335;
    --header-color: #7b3b3b;
    --primary-color: #7b3b3b;
    --secondary-color: #3b7b3b;
    --cell-bg: #f1e3c4;
    --cell-hover: #e8d0a9;
    --score-bg: #f1e3c4;
    --winner-color: rgba(123, 59, 59, 0.5);
    --shadow-color: rgba(58, 51, 53, 0.2);
    --button-bg: #7b3b3b;
    --button-hover: #6a2e2e;
    --history-bg: #f1e3c4;
    --border-color: #d3b17d;
    --modal-bg: #e8d0a9;
    --modal-header: #f1e3c4;
    --modal-footer: #f1e3c4;
}

/* Ocean Theme */
body.ocean-theme {
    --bg-color: #e0f7fa;
    --container-bg: #fff;
    --text-color: #01579b;
    --header-color: #0288d1;
    --primary-color: #0288d1;
    --secondary-color: #00acc1;
    --cell-bg: #e1f5fe;
    --cell-hover: #b3e5fc;
    --score-bg: #e1f5fe;
    --winner-color: rgba(2, 136, 209, 0.5);
    --shadow-color: rgba(2, 136, 209, 0.2);
    --button-bg: #00acc1;
    --button-hover: #0097a7;
    --history-bg: #e1f5fe;
    --border-color: #b3e5fc;
    --modal-bg: #fff;
    --modal-header: #e1f5fe;
    --modal-footer: #e1f5fe;
}

body {
    font-family: 'Arial', sans-serif;
    background: var(--bg-color);
    backdrop-filter: blur(10px);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    color: var(--text-color);
    transition: all var(--transition-time);
}

.container {
    text-align: center;
    background-color: var(--container-bg);
    backdrop-filter: blur(20px);
    border-radius: 20px;
    box-shadow: 0 8px 32px var(--shadow-color);
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 2rem;
    max-width: 500px;
    width: 90%;
    transition: all var(--transition-time);
}

.controls-container {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

h1 {
    color: var(--header-color);
    font-size: 2.8rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 0;
    transition: color var(--transition-time);
}

/* Theme and Sound Controls */
.controls {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.controls button {
    background: none;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    width: 40px;
    height: 40px;
    border-radius: 12px;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: var(--score-bg);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--text-color);
    transition: all var(--transition-time);
}

.controls button:hover {
    background-color: var(--cell-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow-color);
}

/* Sound Controls */
.sound-controls {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    position: relative;
}

.volume-control {
    width: 0;
    overflow: hidden;
    transition: width 0.3s ease;
}

.sound-controls:hover .volume-control,
.volume-control:focus-within {
    width: 80px;
}

/* Volume Slider */
#volume-slider {
    -webkit-appearance: none;
    width: 80px;
    height: 6px;
    background: var(--border-color);
    border-radius: 3px;
    outline: none;
}

#volume-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
}

#volume-slider::-moz-range-thumb {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    border: none;
}

/* Theme toggle icon */
body.dark-theme #theme-toggle i,
body.neon-theme #theme-toggle i,
body.retro-theme #theme-toggle i,
body.ocean-theme #theme-toggle i,
body.pastel-theme #theme-toggle i {
    content: "\f185";
}

/* Game Options */
.game-options {
    display: flex;
    justify-content: space-between;
    margin-bottom: 1.5rem;
    padding: 1rem;
    background-color: var(--score-bg);
    border-radius: 5px;
    transition: background-color var(--transition-time);
}

.option-group {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.option-group label {
    margin-bottom: 0.5rem;
    font-weight: bold;
}

.option-group select {
    padding: 0.5rem;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.3);
    background-color: var(--container-bg);
    backdrop-filter: blur(10px);
    color: var(--text-color);
    transition: all var(--transition-time);
}

.option-group select:hover {
    border-color: var(--primary-color);
    box-shadow: 0 2px 8px var(--shadow-color);
}

/* Toggle Switch for Auto Restart */
.toggle-switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 24px;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-switch label {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    transition: .4s;
    border-radius: 24px;
    margin: 0;
}

.toggle-switch label:before {
    position: absolute;
    content: "";
    height: 16px;
    width: 16px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: .4s;
    border-radius: 50%;
}

.toggle-switch input:checked + label {
    background-color: var(--primary-color);
}

.toggle-switch input:checked + label:before {
    transform: translateX(26px);
}

.toggle-switch input:focus + label {
    box-shadow: 0 0 1px var(--primary-color);
}

.auto-restart-container {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 10px;
}

.auto-restart-container label {
    margin-bottom: 0;
}

/* Status and Reset Button */
.status-container {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

#status {
    font-size: 1.2rem;
    font-weight: bold;
    color: var(--primary-color);
    transition: color var(--transition-time);
    text-align: center;
    padding: 0.5rem;
    border-radius: 5px;
}

/* Highlight status during countdown */
#status.countdown {
    background-color: var(--primary-color);
    color: white;
    animation: pulse 1s infinite alternate;
}

@keyframes pulse {
    from { opacity: 0.8; }
    to { opacity: 1; }
}

.status-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.auto-restart-container {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.auto-restart-container label {
    font-weight: bold;
    margin-bottom: 0;
}

#reset-btn {
    background: var(--button-bg);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 12px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    transition: all var(--transition-time);
}

#reset-btn:hover {
    background: var(--button-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.2);
}

/* Score Board */
.score-board {
    display: flex;
    justify-content: space-around;
    margin-bottom: 1.5rem;
    background-color: var(--score-bg);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 1rem;
    border-radius: 16px;
    transition: background-color var(--transition-time);
}

.score {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.player {
    font-weight: bold;
    margin-bottom: 0.5rem;
}

#score-x, #score-o {
    font-size: 1.5rem;
    font-weight: bold;
    position: relative;
}

#score-x {
    color: var(--primary-color);
    transition: color var(--transition-time);
}

#score-o {
    color: var(--secondary-color);
    transition: color var(--transition-time);
}

/* Streak indicators */
.score.streak-2::after {
    content: "🔥";
    position: absolute;
    font-size: 1.2rem;
    top: -10px;
    right: -15px;
}

.score.streak-3::after {
    content: "🔥🔥";
    position: absolute;
    font-size: 1.2rem;
    top: -10px;
    right: -25px;
}

.score.streak-4::after {
    content: "🔥🔥🔥";
    position: absolute;
    font-size: 1.2rem;
    top: -10px;
    right: -35px;
}

/* Winning animation for streaks */
@keyframes winner-streak {
    0% { transform: scale(1); }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); }
}

.score.streak-active {
    animation: winner-streak 0.5s ease-in-out 2;
}

/* Game Board */
.board {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-gap: 10px;
    margin: 0 auto 1.5rem;
    width: 100%;
    max-width: 300px;
}

/* Board size specific styles */
.board[data-size="3"] {
    max-width: 300px;
}

.board[data-size="4"] {
    max-width: 320px;
    grid-gap: 8px;
}

.board[data-size="5"] {
    max-width: 340px;
    grid-gap: 6px;
}

.cell {
    background-color: var(--cell-bg);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    aspect-ratio: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 3rem;
    font-weight: bold;
    cursor: pointer;
    border-radius: 16px;
    transition: all var(--transition-time);
    position: relative;
    overflow: hidden;
}

.cell::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, transparent 0%, rgba(255, 255, 255, 0.1) 50%, transparent 100%);
    opacity: 0;
    transition: opacity var(--transition-time);
}

/* Cell size adjustments for different board sizes */
.board[data-size="4"] .cell {
    font-size: 2.5rem;
}

.board[data-size="5"] .cell {
    font-size: 2rem;
}

.cell:hover {
    background-color: var(--cell-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px var(--shadow-color);
}

.cell:hover::after {
    opacity: 1;
}

/* X and O styles */
.cell.x::before {
    content: "\f00d";
    font-family: "Font Awesome 6 Free";
    font-weight: 900;
    color: var(--primary-color);
    transition: color var(--transition-time);
}

.cell.o::before {
    content: "\f111";
    font-family: "Font Awesome 6 Free";
    font-weight: 900;
    color: var(--secondary-color);
    transition: color var(--transition-time);
}

/* Winning animation */
@keyframes winner {
    0% { background-color: rgba(46, 204, 113, 0.2); }
    50% { background-color: var(--winner-color); }
    100% { background-color: rgba(46, 204, 113, 0.2); }
}

.cell.winner {
    animation: winner 1s ease-in-out infinite;
}

/* Game History */
.game-history {
    background-color: var(--history-bg);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 16px;
    padding: 1rem;
    text-align: left;
    max-height: 200px;
    overflow-y: auto;
    transition: background-color var(--transition-time);
}

.game-history h3 {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
    color: var(--header-color);
    transition: color var(--transition-time);
}

#clear-history {
    background: none;
    border: none;
    color: var(--secondary-color);
    cursor: pointer;
    font-size: 0.9rem;
    transition: color var(--transition-time);
}

#clear-history:hover {
    color: var(--button-hover);
}

#history-list {
    font-size: 0.9rem;
}

.history-item {
    padding: 0.5rem;
    border-bottom: 1px solid var(--border-color);
    transition: border-color var(--transition-time);
}

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

.history-item .winner {
    font-weight: bold;
}

.history-item .timestamp {
    font-size: 0.8rem;
    color: #777;
    margin-left: 0.5rem;
}

/* Sound toggle */
#sound-toggle.sound-off i::before {
    content: "\f6a9";
}

/* Responsive design */

/* Base responsive styles for all devices */
@media (max-width: 1200px) {
    .container {
        max-width: 90%;
    }
}

/* Tablets and smaller laptops */
@media (max-width: 768px) {
    body {
        padding: 1rem 0;
    }

    .container {
        max-width: 95%;
        padding: 1.5rem;
    }

    h1 {
        font-size: 2.2rem;
    }

    .board[data-size="3"] {
        max-width: 350px;
    }

    .board[data-size="4"] {
        max-width: 380px;
    }

    .board[data-size="5"] {
        max-width: 400px;
    }

    .cell {
        font-size: 2.8rem;
    }

    .board[data-size="4"] .cell {
        font-size: 2.3rem;
    }

    .board[data-size="5"] .cell {
        font-size: 1.8rem;
    }

    .game-history {
        max-height: 180px;
    }
}

/* Large phones and small tablets */
@media (max-width: 600px) {
    .container {
        padding: 1.2rem;
    }

    .header {
        flex-direction: column;
        gap: 1rem;
    }

    .controls {
        width: 100%;
        justify-content: center;
    }

    .sound-controls:hover .volume-control,
    .volume-control:focus-within {
        width: 100px;
    }

    h1 {
        font-size: 2rem;
    }

    .game-options {
        flex-direction: column;
        gap: 1rem;
    }

    .option-group {
        width: 100%;
    }

    .option-group select {
        width: 100%;
    }

    .auto-restart-container {
        flex-direction: row;
        justify-content: space-between;
        width: 100%;
    }

    .board[data-size="3"] {
        max-width: 300px;
        grid-gap: 8px;
    }

    .board[data-size="4"] {
        max-width: 320px;
        grid-gap: 6px;
    }

    .board[data-size="5"] {
        max-width: 340px;
        grid-gap: 5px;
    }

    .cell {
        font-size: 2.5rem;
    }

    .board[data-size="4"] .cell {
        font-size: 2rem;
    }

    .board[data-size="5"] .cell {
        font-size: 1.6rem;
    }
}

/* Small phones */
@media (max-width: 480px) {
    body {
        align-items: flex-start;
        padding-top: 1rem;
    }

    .container {
        padding: 1rem;
        width: 95%;
        border-radius: 8px;
    }

    h1 {
        font-size: 1.8rem;
    }

    #status {
        font-size: 1.1rem;
        padding: 0.4rem;
    }

    .status-controls {
        flex-direction: column;
        align-items: center;
        gap: 0.8rem;
    }

    .auto-restart-container {
        width: 100%;
        justify-content: center;
    }

    #reset-btn {
        width: 100%;
    }

    .board[data-size="3"] {
        max-width: 280px;
        grid-gap: 6px;
        margin-bottom: 1rem;
    }

    .board[data-size="4"] {
        max-width: 300px;
        grid-gap: 5px;
        margin-bottom: 1rem;
    }

    .board[data-size="5"] {
        max-width: 320px;
        grid-gap: 4px;
        margin-bottom: 1rem;
    }

    .cell {
        font-size: 2.2rem;
        border-radius: 4px;
    }

    .board[data-size="4"] .cell {
        font-size: 1.8rem;
    }

    .board[data-size="5"] .cell {
        font-size: 1.4rem;
    }

    .score-board {
        padding: 0.8rem;
    }

    #score-x, #score-o {
        font-size: 1.3rem;
    }

    .game-history {
        max-height: 150px;
        font-size: 0.85rem;
    }

    .game-history h3 {
        font-size: 1rem;
    }
}

/* Very small phones */
@media (max-width: 360px) {
    .container {
        padding: 0.8rem;
    }

    h1 {
        font-size: 1.6rem;
    }

    .board[data-size="3"] {
        max-width: 240px;
        grid-gap: 5px;
    }

    .board[data-size="4"] {
        max-width: 260px;
        grid-gap: 4px;
    }

    .board[data-size="5"] {
        max-width: 280px;
        grid-gap: 3px;
    }

    .cell {
        font-size: 2rem;
    }

    .board[data-size="4"] .cell {
        font-size: 1.6rem;
    }

    .board[data-size="5"] .cell {
        font-size: 1.2rem;
    }

    .controls button {
        width: 35px;
        height: 35px;
    }
}

/* Landscape orientation for mobile devices */
@media (max-height: 500px) and (orientation: landscape) {
    body {
        align-items: flex-start;
        padding: 0.5rem;
    }

    .container {
        padding: 1rem;
        display: grid;
        grid-template-columns: 1fr 1fr;
        grid-template-rows: auto auto auto;
        grid-template-areas:
            "header header"
            "board controls"
            "history history";
        gap: 1rem;
        max-width: 95%;
    }

    .header {
        grid-area: header;
    }

    .board {
        grid-area: board;
        margin: 0;
    }

    .controls-container {
        grid-area: controls;
        display: flex;
        flex-direction: column;
        gap: 1rem;
    }

    .game-options, .status-container, .score-board {
        margin-bottom: 0.5rem;
    }

    .game-history {
        grid-area: history;
    }
}

/* Landscape mode class */
body.landscape-mode .container {
    padding: 1rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto auto auto;
    grid-template-areas:
        "header header"
        "board controls"
        "history history";
    gap: 1rem;
    max-width: 95%;
}

/* Touch-friendly improvements */
@media (hover: none) and (pointer: coarse) {
    .cell {
        min-height: 60px;
    }

    .controls button, #reset-btn, #clear-history {
        min-height: 44px;
        min-width: 44px;
    }

    select, button {
        padding: 0.7rem;
    }

    /* Increase touch target sizes */
    .option-group label {
        margin-bottom: 0.8rem;
        font-size: 1.1rem;
    }

    /* Add active state for touch devices */
    .cell:active {
        opacity: 0.8;
        transform: scale(0.95);
    }

    button:active {
        opacity: 0.8;
        transform: scale(0.95);
    }

    /* Disable hover effects that can cause issues on touch devices */
    .cell:hover {
        background-color: var(--cell-bg);
    }

    /* Prevent text selection on double-tap */
    * {
        -webkit-tap-highlight-color: transparent;
        -webkit-touch-callout: none;
        user-select: none;
    }
}

/* Add smooth scrolling for all devices */
html {
    scroll-behavior: smooth;
}

/* Add better focus styles for accessibility */
button:focus, select:focus, input:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Improve performance on mobile devices */
@media (max-width: 768px) {
    .cell, button, .header, .container {
        will-change: transform;
        backface-visibility: hidden;
    }
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    justify-content: center;
    align-items: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background-color: var(--modal-bg);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 20px;
    box-shadow: 0 12px 40px var(--shadow-color);
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    animation: modalFadeIn 0.3s;
}

@keyframes modalFadeIn {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background-color: var(--modal-header);
    backdrop-filter: blur(10px);
    border-top-left-radius: 20px;
    border-top-right-radius: 20px;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h2 {
    margin: 0;
    color: var(--header-color);
    font-size: 1.5rem;
}

.close-modal {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-color);
}

.modal-body {
    padding: 1rem;
}

.modal-footer {
    padding: 1rem;
    text-align: right;
    background-color: var(--modal-footer);
    backdrop-filter: blur(10px);
    border-top: 1px solid var(--border-color);
    border-bottom-left-radius: 20px;
    border-bottom-right-radius: 20px;
}

#save-personalization {
    background: var(--button-bg);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 12px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    transition: all var(--transition-time);
}

#save-personalization:hover {
    background: var(--button-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.2);
}

/* Tabs */
.tabs {
    display: flex;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 1rem;
    overflow-x: auto;
}

.tab-btn {
    background: none;
    border: none;
    padding: 0.5rem 1rem;
    cursor: pointer;
    color: var(--text-color);
    font-weight: bold;
    border-radius: 8px;
    transition: all 0.2s ease;
    border-bottom: 2px solid transparent;
}

.tab-btn:hover {
    background-color: rgba(102, 126, 234, 0.1);
}

.tab-btn.active {
    color: var(--primary-color);
    background-color: rgba(102, 126, 234, 0.1);
    border-bottom: 2px solid var(--primary-color);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* Form Styles */
.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: bold;
}

.form-group input {
    width: 100%;
    padding: 0.5rem;
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 12px;
    background-color: var(--container-bg);
    backdrop-filter: blur(10px);
    color: var(--text-color);
    transition: all var(--transition-time);
}

.form-group input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
    outline: none;
}

/* Marker Options */
.marker-options {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.marker-option {
    width: 40px;
    height: 40px;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: var(--cell-bg);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 12px;
    cursor: pointer;
    font-size: 1.2rem;
    transition: all var(--transition-time);
}

.marker-option:hover {
    background-color: var(--cell-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow-color);
}

.marker-option.selected {
    background: var(--button-bg);
    color: white;
    border-color: transparent;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

/* Theme Options */
.theme-options {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 1rem;
}

.theme-option {
    display: flex;
    flex-direction: column;
    align-items: center;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 5px;
    transition: all var(--transition-time);
}

.theme-option:hover {
    background-color: var(--cell-hover);
}

.theme-option.selected {
    background-color: var(--cell-hover);
    outline: 2px solid var(--primary-color);
}

.theme-preview {
    width: 80px;
    height: 50px;
    border-radius: 5px;
    margin-bottom: 0.5rem;
    border: 1px solid var(--border-color);
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.theme-preview::before, .theme-preview::after {
    content: "";
    position: absolute;
    width: 20px;
    height: 20px;
    border-radius: 3px;
}

.theme-preview::before {
    left: 10px;
    background-color: #3498db;
}

.theme-preview::after {
    right: 10px;
    background-color: #e74c3c;
}

.default-theme {
    background-color: #f5f5f5;
}

.dark-theme {
    background-color: #121212;
}

.dark-theme::before {
    background-color: #4a6fa5;
}

.dark-theme::after {
    background-color: #e74c3c;
}

.neon-theme {
    background-color: #0f0f1a;
}

.neon-theme::before {
    background-color: #00ffff;
}

.neon-theme::after {
    background-color: #ff00ff;
}

.pastel-theme {
    background-color: #f9f7f7;
}

.pastel-theme::before {
    background-color: #a6d5a6;
}

.pastel-theme::after {
    background-color: #d5a6a6;
}

.retro-theme {
    background-color: #d3b17d;
}

.retro-theme::before {
    background-color: #7b3b3b;
}

.retro-theme::after {
    background-color: #3b7b3b;
}

.ocean-theme {
    background-color: #e0f7fa;
}

.ocean-theme::before {
    background-color: #0288d1;
}

.ocean-theme::after {
    background-color: #00acc1;
}

/* Board Size Options */
.board-size-options {
    display: flex;
    gap: 0.5rem;
}

.board-size-option {
    padding: 0.5rem 1rem;
    background-color: var(--cell-bg);
    border: 1px solid var(--border-color);
    border-radius: 5px;
    cursor: pointer;
    transition: all var(--transition-time);
}

.board-size-option:hover {
    background-color: var(--cell-hover);
}

.board-size-option.selected {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.note {
    font-size: 0.9rem;
    color: var(--secondary-color);
    margin-top: 1rem;
}

/* Custom markers in cells */
.cell.custom-x, .cell.custom-o {
    font-size: 2.5rem;
}

.board[data-size="4"] .cell.custom-x,
.board[data-size="4"] .cell.custom-o {
    font-size: 2rem;
}

.board[data-size="5"] .cell.custom-x,
.board[data-size="5"] .cell.custom-o {
    font-size: 1.7rem;
}

.cell.custom-x i, .cell.custom-o i {
    color: var(--primary-color);
    transition: all var(--transition-time);
}

.cell.custom-o i {
    color: var(--secondary-color);
}