/* Root CSS Variables - Light Theme */
:root {
    /* Color variables */
    --x-color: #FF0000; /* Player X color (Bright Red) */
    --o-color: #0000FF; /* Player O color (Bright Blue) */
    --bg-color: #E8ECF3; /* Background color */
    --frame-color: #FFFFFF; /* Component frame color */
    --text-color: #1A202C; /* Main text color */
    --button-color: #6C5CE7; /* Primary button color */
    --button-hover: #5D4ED6; /* Button hover state */
    --accent-color: #93D7BE; /* Accent highlights */
    --border-color: #E2E8F0; /* Border elements */
    --shadow-color: rgba(108, 92, 231, 0.2); /* Shadow color with opacity */
    
    /* Spacing variables for consistent layout */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 12px;
    --spacing-lg: 16px;
    --spacing-xl: 20px;
    
    /* Border styling variables */
    --border-width: 2px;
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --border-radius-lg: 16px;
    
    /* Shadow effects with layered depth */
    --shadow-main: 0 4px 12px rgba(0, 0, 0, 0.08), 0 2px 4px rgba(0, 0, 0, 0.04);
    --shadow-inner: inset 0 2px 4px rgba(0, 0, 0, 0.06);
    --shadow-hover: 0 6px 15px rgba(0, 0, 0, 0.1), 0 3px 6px rgba(0, 0, 0, 0.05);
    
    /* Other visual effects */
    --gradient-main: linear-gradient(135deg, var(--frame-color), var(--bg-color));
    --transition-main: all 0.3s ease;
    
    /* Standardized shadow system */
    --shadow-raised: 0 4px 6px rgba(0, 0, 0, 0.1), 0 2px 4px rgba(0, 0, 0, 0.06);
    --shadow-inset: inset 0 2px 4px rgba(0, 0, 0, 0.06);
    --shadow-hover: 0 6px 12px rgba(0, 0, 0, 0.12), 0 3px 6px rgba(0, 0, 0, 0.08);
}

/* Dark Theme Variables */
[data-theme="dark"] {
    --bg-color: #0F172A;
    --frame-color: #1E293B;
    --text-color: #F8FAFC;
    --button-color: #6366F1;
    --button-hover: #4F46E5;
    --accent-color: #475569;
    --border-color: #334155;
    --shadow-color: rgba(0, 0, 0, 0.3);
    --shadow-main: 0 8px 20px var(--shadow-color);
    --shadow-inner: inset 0 2px 4px rgba(255, 255, 255, 0.05);
    --gradient-main: linear-gradient(135deg, var(--frame-color), var(--bg-color));
    
    /* Dark theme shadow adjustments */
    --shadow-raised: 0 4px 6px rgba(0, 0, 0, 0.25), 0 2px 4px rgba(0, 0, 0, 0.15);
    --shadow-inset: inset 0 2px 4px rgba(0, 0, 0, 0.2);
    --shadow-hover: 0 6px 12px rgba(0, 0, 0, 0.3), 0 3px 6px rgba(0, 0, 0, 0.2);
}

/* Global Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

/* Body Layout */
body {
    background: var(--gradient-main);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    color: var(--text-color);
}

/* Main Container Layout */
.container {
    display: flex;
    gap: var(--spacing-xl);
    padding: var(--spacing-xl);
}

/* Left Panel Layout */
.left-panel {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
    width: 300px;
}

/* Main Game Area Styling */
.game-area {
    flex: 1;
    background-color: var(--frame-color);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-raised);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xl);
    min-width: 0;
}

/* Side Panel Layout */
.side-panel {
    width: 300px;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
    position: sticky;
    top: var(--container-padding);
}

/* Title and Scoreboard Styling */
.title-container, .score-board {
    background: var(--frame-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-raised);
    width: 100%;
}

/* Common Panel Styling */
.game-status, .move-history, .player-names {
    background: var(--frame-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-raised);
}

/* Game Title Section */
.title-container {
    text-align: center;
    position: relative;
    padding: var(--spacing-md) var(--spacing-lg);
    margin: 0 auto;
    background: var(--frame-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-raised);
    width: 100%;
    border: 1px solid var(--border-color);
}

/* Main Title Styling */
h1 {
    font-size: min(2.0em, 5vw);
    font-weight: 900;
    text-transform: uppercase;
    margin: 0;
    padding: 0;
    letter-spacing: min(4px, 0.5vw);
    white-space: nowrap;
    background: linear-gradient(135deg, 
        var(--x-color) 0%, 
        #A3B8D9 50%, 
        var(--o-color) 100%
    );
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1.2;
}

/* Subtitle Styling */
.subtitle {
    font-size: min(0.95em, 3vw);
    font-weight: 500;
    background: linear-gradient(135deg, #A3B8D9, var(--button-color));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: min(3px, 0.3vw);
    text-transform: uppercase;
    white-space: nowrap;
}

/* Dark Theme Title Adjustments */
[data-theme="dark"] h1 {
    background: linear-gradient(135deg, 
        var(--x-color) 0%, 
        #A3B8D9 50%, 
        var(--o-color) 100%
    );
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

[data-theme="dark"] .subtitle {
    background: linear-gradient(135deg, #A3B8D9, var(--button-color));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Player Info Section */
.player-info {
    display: flex;
    flex-direction: column;
    gap: var(--panel-gap);
    width: 100%;
    max-width: 380px;
    align-items: center;
}

/* Player Names Input Section */
.player-names {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--frame-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-main);
}

/* Player Input Field Container */
.player-input {
    display: flex;
    align-items: center;
    padding: var(--spacing-md);
    background: var(--bg-color);
    border-radius: var(--border-radius-sm);
    box-shadow: var(--shadow-inset);
    border: 2px solid transparent;
    transition: var(--transition-main);
}

/* Player X Input Styling */
.player-input:first-child {
    border-color: var(--x-color);
}

/* Player O Input Styling */
.player-input:last-child {
    border-color: var(--o-color);
}

/* Input Labels */
.player-input label {
    white-space: nowrap;
    font-weight: 600;
    min-width: 85px;
    font-size: 0.95em;
}

/* Player X Label Color */
.player-input:first-child label {
    color: var(--x-color);
}

/* Player O Label Color */
.player-input:last-child label {
    color: var(--o-color);
}

/* Input Field Styling */
.player-input input {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    border-radius: var(--border-radius-sm);
    outline: none;
    transition: var(--transition-main);
    background-color: var(--frame-color);
    color: var(--text-color);
    font-size: 0.95em;
    min-width: 0;
    box-shadow: var(--shadow-main);
}

/* Input Focus States */
.player-input input:focus {
    box-shadow: 0 0 0 2px var(--button-color);
}

.player-input:first-child input:focus {
    box-shadow: 0 0 0 2px var(--x-color);
}

.player-input:last-child input:focus {
    box-shadow: 0 0 0 2px var(--o-color);
}

/* Scoreboard Styles */
.score-board {
    background: var(--frame-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-raised);
    width: 100%;
    max-width: 380px;
}

.score-title {
    text-align: center;
    font-size: 0.85em;
    font-weight: 600;
    margin-bottom: 6px;
    letter-spacing: 1px;
    color: var(--text-color);
    opacity: 0.8;
    text-transform: uppercase;
}

.score-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    background: var(--bg-color);
    padding: var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    box-shadow: var(--shadow-inset);
}

.score {
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius-sm);
    font-size: 16px;
    font-weight: bold;
    text-align: center;
    transition: var(--transition-main);
    background: #FFFFFF;
    box-shadow: var(--shadow-main);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
    border: 2px solid;
}

.score span {
    background: var(--bg-color);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    min-width: 28px;
    font-size: 0.95em;
    box-shadow: var(--shadow-inner);
}

.x-score {
    color: var(--x-color);
    border-color: var(--x-color);
}

.o-score {
    color: var(--o-color);
    border-color: var(--o-color);
}

.x-score:hover, .o-score:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-hover);
}

/* Game Board */
.game-board {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    width: 100%;
    max-width: 500px;
    padding: var(--spacing-md);
    background: var(--bg-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-inset);
}

.board-row {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
}

.cell {
    width: 150px;
    height: 150px;
    border: none;
    background-color: var(--frame-color);
    border-radius: var(--border-radius-sm);
    font-size: 48px;
    font-weight: bold;
    cursor: pointer;
    transition: var(--transition-main);
    box-shadow: var(--shadow-main);
}

.cell:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
    background-color: #FFFFFF;
    border: 2px solid var(--button-color);
}

.cell.x {
    color: var(--x-color);
    background: linear-gradient(135deg, #FFE8E8, #FFF);
    border: 2px solid var(--x-color);
}

.cell.o {
    color: var(--o-color);
    background: linear-gradient(135deg, #E8FFF8, #FFF);
    border: 2px solid var(--o-color);
}

/* Game Controls */
.game-controls {
    width: 100%;
    max-width: 380px;
    padding: var(--spacing-md);
    background: var(--bg-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-inset);
}

.control-buttons {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    width: 100%;
}

.control-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    border-radius: var(--border-radius-sm);
    background-color: var(--button-color);
    color: white;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-main);
    box-shadow: var(--shadow-main);
    width: 100%;
    text-align: center;
    white-space: nowrap;
    font-size: 0.9em;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.control-btn:nth-child(2), .control-btn:nth-child(3) {
    background-color: var(--accent-color);
    color: var(--text-color);
}

.control-btn:nth-child(2):hover:not(:disabled),
.control-btn:nth-child(3):hover:not(:disabled) {
    background: var(--accent-color);
    opacity: 0.9;
}

.control-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
    background: var(--button-hover);
}

.control-btn:disabled {
    background: #B0B0B0; /* Gray color for disabled state */
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
    opacity: 0.6;
}

/* Game Info */
.game-info {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-color);
    border-radius: var(--border-radius-sm);
    box-shadow: var(--shadow-inset);
}

#current-player, #timer, #moves {
    padding: var(--spacing-md);
    border-radius: var(--border-radius-sm);
    background: var(--frame-color);
    box-shadow: var(--shadow-main);
    font-weight: 600;
    color: var(--text-color);
    transition: var(--transition-main);
    font-size: 0.95em;
    text-align: center;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    border: 2px solid var(--border-color);
    position: relative;
}

#current-player::before {
    content: "";
    width: 20px;
    height: 20px;
    background-color: var(--button-color);
    border-radius: 50%;
    opacity: 0.8;
    position: absolute;
    left: var(--spacing-md);
}

#timer::before {
    content: "";
    width: 20px;
    height: 20px;
    background: var(--button-color);
    -webkit-mask: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M12 2C6.5 2 2 6.5 2 12s4.5 10 10 10 10-4.5 10-10S17.5 2 12 2zm0 18c-4.4 0-8-3.6-8-8s3.6-8 8-8 8 3.6 8 8-3.6 8-8 8zm1-8.5V7c0-.6-.4-1-1-1s-1 .4-1 1v5c0 .3.1.5.3.7l3 3c.2.2.4.3.7.3.3 0 .5-.1.7-.3.4-.4.4-1 0-1.4L13 11.5z"/></svg>') center/contain;
    mask: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M12 2C6.5 2 2 6.5 2 12s4.5 10 10 10 10-4.5 10-10S17.5 2 12 2zm0 18c-4.4 0-8-3.6-8-8s3.6-8 8-8 8 3.6 8 8-3.6 8-8 8zm1-8.5V7c0-.6-.4-1-1-1s-1 .4-1 1v5c0 .3.1.5.3.7l3 3c.2.2.4.3.7.3.3 0 .5-.1.7-.3.4-.4.4-1 0-1.4L13 11.5z"/></svg>') center/contain;
    opacity: 0.8;
    position: absolute;
    left: var(--spacing-md);
}

#moves::before {
    content: "";
    width: 20px;
    height: 20px;
    background: var(--button-color);
    -webkit-mask: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M4 4h4v4H4V4zm6 0h4v4h-4V4zm6 0h4v4h-4V4zM4 10h4v4H4v-4zm6 0h4v4h-4v-4zm6 0h4v4h-4v-4zM4 16h4v4H4v-4zm6 0h4v4h-4v-4zm6 0h4v4h-4v-4z"/></svg>') center/contain;
    mask: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M4 4h4v4H4V4zm6 0h4v4h-4V4zm6 0h4v4h-4V4zM4 10h4v4H4v-4zm6 0h4v4h-4v-4zm6 0h4v4h-4v-4zM4 16h4v4H4v-4zm6 0h4v4h-4v-4zm6 0h4v4h-4v-4z"/></svg>') center/contain;
    opacity: 0.8;
    position: absolute;
    left: var(--spacing-md);
}

#current-player.x-turn::before {
    background-color: var(--x-color);
    opacity: 1;
}

#current-player.o-turn::before {
    background-color: var(--o-color);
    opacity: 1;
}

/* Dark mode adjustments */
[data-theme="dark"] #current-player,
[data-theme="dark"] #timer,
[data-theme="dark"] #moves {
    background: var(--bg-color);
    border-color: var(--border-color);
}

[data-theme="dark"] #current-player.x-turn {
    border-color: var(--x-color);
}

[data-theme="dark"] #current-player.o-turn {
    border-color: var(--o-color);
}

/* Move History */
.move-history h2 {
    color: var(--text-color);
    margin-bottom: 10px;
    text-align: center;
    font-size: 0.85em;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    opacity: 0.8;
}

.history-container {
    height: 180px;
    overflow-y: auto;
    padding: var(--spacing-md);
    background: var(--bg-color);
    border-radius: var(--border-radius-sm);
    box-shadow: var(--shadow-inset);
    margin-top: var(--spacing-md);
    white-space: pre-line;
    line-height: 1.5;
    font-size: 0.9em;
    min-height: 180px;
    border: 2px solid var(--border-color);
}

/* Switch Styles */
.switch {
    position: relative;
    display: inline-block;
    width: 60px;
    height: 30px;
}

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

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-color);
    transition: .4s;
    border-radius: 34px;
    box-shadow: var(--shadow-inner);
    border: 2px solid var(--border-color);
}

.slider:before {
    position: absolute;
    content: "";
    height: 22px;
    width: 22px;
    left: 4px;
    background: var(--frame-color);
    transition: .4s;
    border-radius: 50%;
    box-shadow: var(--shadow-main);
    font-size: 16px;
    text-align: center;
    line-height: 22px;
    top: 50%;
    transform: translateY(-50%);
}

input:checked + .slider {
    background: linear-gradient(135deg, var(--button-color), var(--button-hover));
    border-color: var(--button-color);
}

input:checked + .slider:before {
    transform: translate(26px, -50%);
    content: "";
}

/* Responsive Design */
@media (max-width: 1024px) {
    .container {
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-lg);
        padding: var(--spacing-lg);
    }
    
    .side-panel, .game-area {
        width: 100%;
        max-width: 380px;
    }
}

@media (max-width: 768px) {
    .container {
        padding: var(--spacing-md);
        gap: var(--spacing-md);
    }

    .title-container {
        padding: var(--spacing-sm) var(--spacing-md);
    }

    h1 {
        font-size: 2em;
        letter-spacing: 3px;
    }

    .subtitle {
        font-size: 0.9em;
        letter-spacing: 1.5px;
    }

    .cell {
        width: 80px;
        height: 80px;
        font-size: 32px;
    }

    .control-btn {
        height: 34px;
        font-size: 0.85em;
    }

    .history-container {
        height: 150px;
        min-height: 150px;
    }
}

@media (max-width: 480px) {
    .cell {
        width: 70px;
        height: 70px;
        font-size: 28px;
    }

    .control-buttons {
        grid-template-columns: 1fr;
    }

    .score {
        font-size: 14px;
    }

    #current-player, #timer, #moves {
        font-size: 0.85em;
        height: 34px;
    }

    h1 {
        font-size: 1.8em;
        letter-spacing: 2px;
    }

    .subtitle {
        font-size: 0.8em;
        letter-spacing: 1px;
    }
}

/* Touch device optimizations */
@media (hover: none) {
    .cell:hover {
        transform: none;
        box-shadow: var(--shadow-main);
    }

    .control-btn:hover:not(:disabled) {
        transform: none;
    }
}

.theme-switch {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
}

.theme-switch span {
    color: var(--text-color);
    font-size: 14px;
}

/* Dark mode specific overrides */
[data-theme="dark"] .cell {
    background-color: #334155;
}

[data-theme="dark"] .cell:hover {
    background-color: #475569;
}

[data-theme="dark"] .cell.x {
    background: linear-gradient(135deg, rgba(255, 0, 0, 0.15), #334155);
}

[data-theme="dark"] .cell.o {
    background: linear-gradient(135deg, rgba(0, 0, 255, 0.15), #334155);
}

[data-theme="dark"] .player-input input {
    background-color: #334155;
    border-color: #475569;
    color: #F8FAFC;
}

[data-theme="dark"] .player-input input:hover,
[data-theme="dark"] .player-input input:focus {
    background-color: #475569;
    border-color: var(--button-color);
}

[data-theme="dark"] .history-container {
    background-color: #334155;
    color: #F8FAFC;
}

[data-theme="dark"] h1 {
    background: linear-gradient(135deg, 
        var(--x-color) 0%, 
        #A3B8D9 50%, 
        var(--o-color) 100%
    );
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

[data-theme="dark"] .game-info {
    background-color: #1E293B;
}

[data-theme="dark"] #current-player,
[data-theme="dark"] #timer {
    background-color: #334155;
    border-color: #475569;
    color: #F8FAFC;
}

[data-theme="dark"] .score {
    background-color: #334155;
}

[data-theme="dark"] .score span {
    background: linear-gradient(135deg, #475569, #334155);
    color: #F8FAFC;
}

.game-status {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--frame-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-main);
}

.game-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-color);
    border-radius: var(--border-radius-sm);
    box-shadow: var(--shadow-inner);
}

.game-mode {
    background: var(--frame-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-main);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.mode-switch {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md);
    background: var(--bg-color);
    border-radius: var(--border-radius-sm);
    box-shadow: var(--shadow-inset);
    color: var(--text-color);
    font-weight: 600;
    font-size: 0.95em;
    position: relative;
    overflow: hidden;
    border: 2px solid var(--border-color);
    height: 48px;
}

[data-theme="dark"] .mode-switch {
    background: var(--bg-color);
    border-color: var(--button-color);
    color: var(--text-color);
}

#current-player, #timer {
    padding: var(--spacing-md);
    border-radius: var(--border-radius-sm);
    background: var(--frame-color);
    box-shadow: var(--shadow-main);
    font-weight: 600;
    color: var(--text-color);
    transition: var(--transition-main);
    font-size: 0.95em;
    text-align: center;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid var(--border-color);
}

#current-player.x-turn {
    border-color: var(--x-color);
    color: var(--x-color);
}

#current-player.o-turn {
    border-color: var(--o-color);
    color: var(--o-color);
}

#timer {
    border-color: var(--accent-color);
    color: var(--text-color);
}

/* Dark mode adjustments */
[data-theme="dark"] .mode-switch {
    background: var(--bg-color);
    border-color: var(--button-color);
}

[data-theme="dark"] #current-player,
[data-theme="dark"] #timer {
    background: var(--bg-color);
    color: var(--text-color);
}

[data-theme="dark"] #current-player.x-turn {
    color: var(--x-color);
}

[data-theme="dark"] #current-player.o-turn {
    color: var(--o-color);
}

/* Dark mode adjustments */
[data-theme="dark"] .mode-switch,
[data-theme="dark"] #current-player,
[data-theme="dark"] #timer,
[data-theme="dark"] .history-container {
    background: var(--bg-color);
    border-color: var(--border-color);
}

[data-theme="dark"] .slider {
    background: var(--bg-color);
    border-color: var(--border-color);
}

#current-player::before, #timer::before, #moves::before {
    background-color: var(--text-color);
}

[data-theme="dark"] .subtitle {
    background: linear-gradient(135deg, #6366F1, #475569);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Dark mode title adjustments */
[data-theme="dark"] h1 {
    background: linear-gradient(135deg, 
        var(--x-color) 0%, 
        #A3B8D9 50%, 
        var(--o-color) 100%
    );
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

[data-theme="dark"] .subtitle {
    background: linear-gradient(135deg, #A3B8D9, var(--button-color));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Main containers - raised effect */
.title-container,
.game-status,
.move-history,
.player-names,
.game-mode,
.score-board {
    box-shadow: var(--shadow-raised);
}

/* Inner elements - inset effect */
.game-board,
.game-controls,
.game-info,
.history-container,
.score-container,
.player-input,
.mode-switch {
    box-shadow: var(--shadow-inset);
}

/* Interactive elements - raised with hover effect */
.cell,
.control-btn,
.score {
    box-shadow: var(--shadow-raised);
    transition: var(--transition-main);
}

.cell:hover,
.control-btn:hover:not(:disabled),
.score:hover {
    box-shadow: var(--shadow-hover);
}

/* Input fields - subtle raised effect */
.player-input input {
    box-shadow: var(--shadow-raised);
}

/* Game info elements - raised effect */
#current-player,
#timer,
#moves {
    box-shadow: var(--shadow-raised);
}