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

:root {
    --primary-color: #1a1a1a;
    --secondary-color: #ff6b6b;
    --success-color: #51cf66;
    --danger-color: #ff5252;
    --board-light: #cccccc;
    --board-dark: #333333;
    --border-radius: 8px;
    --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
    --transition: all 0.3s ease;
    
    /* Dark theme colors */
    --bg-primary: #0d1b2a;
    --bg-secondary: #1a2332;
    --bg-tertiary: #263445;
    --text-primary: #e0e0e0;
    --text-secondary: #b0b0b0;
    --border-color: #3a4a5a;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #0d1b2a 0%, #1a2f3f 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    color: var(--text-primary);
}

.container {
    width: 100%;
    max-width: 1400px;
}

/* Auth Section */
.auth-section {
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    padding: 60px 40px;
    text-align: center;
    box-shadow: var(--box-shadow);
    border: 1px solid var(--border-color);
}

.auth-section h1 {
    font-size: 3.5em;
    color: var(--secondary-color);
    margin-bottom: 30px;
    font-weight: bold;
}

.auth-form {
    max-width: 400px;
    margin: 0 auto;
}

.auth-form h2 {
    color: var(--text-primary);
    margin-bottom: 25px;
    font-size: 1.8em;
}

.auth-form.hidden {
    display: none;
}

.input-field {
    width: 100%;
    padding: 12px 15px;
    margin-bottom: 15px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1em;
    transition: var(--transition);
    box-sizing: border-box;
    background: var(--bg-primary);
    color: var(--text-primary);
}

.input-field::placeholder {
    color: var(--text-secondary);
}

.input-field:focus {
    outline: none;
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 3px rgba(231, 76, 60, 0.1);
}

.error-message {
    color: var(--danger-color);
    font-weight: 600;
    margin-top: 15px;
    font-size: 0.95em;
}

.auth-toggle {
    margin-top: 20px;
    color: var(--text-primary);
    font-size: 0.95em;
}

.auth-toggle a {
    color: var(--secondary-color);
    text-decoration: none;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.auth-toggle a:hover {
    text-decoration: underline;
}

/* Button Styles */
.btn {
    padding: 12px 28px;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1em;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

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

.btn-primary:hover {
    background-color: #c0392b;
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
}

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

.btn-secondary:hover {
    background-color: #000000;
    transform: translateY(-2px);
}

.btn-danger {
    background-color: var(--danger-color);
    color: rgb(0, 0, 255);
}

.btn-danger:hover {
    background-color: #a93226;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* Game Section */
.game-section {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.game-section.hidden {
    display: none;
}

.hidden {
    display: none !important;
}

.header {
    background: var(--bg-secondary);
    padding: 20px 30px;
    border-radius: var(--border-radius);
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--box-shadow);
    border: 1px solid var(--border-color);
}

.player-info h2 {
    color: var(--text-primary);
    margin-bottom: 8px;
}

.player-color {
    font-weight: 600;
    font-size: 1.1em;
}

.player-color.white {
    color: #fff;
    background: #333;
    padding: 4px 8px;
    border-radius: 4px;
    display: inline-block;
}

.player-color.black {
    color: #fff;
    background: #000;
    padding: 4px 8px;
    border-radius: 4px;
    display: inline-block;
}

/* Game Container */
.game-container {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 30px;
    margin-bottom: 20px;
}

.board-section {
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    padding: 15px;
    box-shadow: var(--box-shadow);
    display: flex;
    flex-direction: column;
    gap: 15px;
    border: 1px solid var(--border-color);
}

/* Player Info Display */
.player-info-top,
.player-info-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 15px;
    background: var(--bg-tertiary);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

.player-info-top {
    border-bottom: 2px solid #ddd;
}

.player-display {
    display: flex;
    align-items: center;
    gap: 15px;
    flex: 1;
}

.opponent-display {
    order: -1;
}

.player-label {
    font-weight: 700;
    color: var(--text-primary);
    font-size: 1em;
    min-width: 80px;
}

.opponent-display .player-label {
    color: #d32f2f;
}

.player-rating {
    background: var(--bg-primary);
    padding: 4px 10px;
    border-radius: 4px;
    font-weight: 600;
    font-size: 0.95em;
    color: var(--text-primary);
    min-width: 50px;
    text-align: center;
    border: 1px solid var(--border-color);
}

.btn-small {
    padding: 6px 12px;
    font-size: 0.85em;
    white-space: nowrap;
}

/* Chess Clock */
.timer {
    font-size: 1.8em;
    font-weight: bold;
    font-family: 'Courier New', monospace;
    padding: 8px 12px;
    border-radius: 4px;
    min-width: 100px;
    text-align: center;
}

.opponent-timer {
    background-color: rgba(211, 47, 47, 0.1);
    color: #d32f2f;
}

.player-timer {
    background-color: rgba(46, 204, 113, 0.1);
    color: #27ae60;
}

.timer.running {
    animation: pulse 1s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

/* Chessboard */
.chessboard {
    width: 100%;
    max-width: 600px;
    aspect-ratio: 1;
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    grid-template-rows: repeat(8, 1fr);
    gap: 0;
    border: 3px solid var(--primary-color);
    margin-bottom: 20px;
}

.square {
    aspect-ratio: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 3em;
    cursor: pointer;
    transition: var(--transition);
    user-select: none;
    position: relative;
}

.square.light {
    background-color: var(--board-light);
}

.square.dark {
    background-color: var(--board-dark);
}

.square:hover {
    opacity: 0.8;
}

.square.selected {
    background-color: rgba(46, 204, 113, 0.6);
    border: 2px solid var(--success-color);
}

.square.valid-move {
    position: relative;
}

.square.valid-move::after {
    content: '';
    position: absolute;
    width: 30%;
    height: 30%;
    background-color: rgba(46, 204, 113, 0.7);
    border-radius: 50%;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.square.check {
    background-color: rgba(231, 76, 60, 0.6) !important;
    border: 2px solid var(--secondary-color);
}

.piece {
    cursor: grab;
    transition: var(--transition);
}

.piece:active {
    cursor: grabbing;
}

.game-info {
    background: var(--bg-tertiary);
    padding: 15px;
    border-radius: var(--border-radius);
    border-left: 4px solid var(--secondary-color);
    text-align: center;
    border: 1px solid var(--border-color);
    border-left: 4px solid var(--secondary-color);
}

.ping-display {
    color: var(--text-secondary);
    font-size: 0.9em;
    margin: 8px 0 0 0;
    font-weight: 500;
}

.ping-display.good {
    color: #4caf50;
}

.ping-display.moderate {
    color: #ff9800;
}

.ping-display.poor {
    color: #f44336;
}

.status-text {
    color: var(--text-primary);
    font-weight: 600;
    margin: 0;
    font-size: 1.05em;
}

.status-text.check {
    color: #ff9800;
    font-size: 1.2em;
    animation: pulse 0.5s ease-in-out infinite;
}

.status-text.checkmate {
    color: #ff1100;
    font-size: 1.3em;
    font-weight: 900;
    animation: pulse 0.3s ease-in-out infinite;
}

.status-text.stalemate {
    color: #ffb300;
    font-size: 1.2em;
    animation: pulse 0.5s ease-in-out infinite;
}

.move-count {
    color: var(--text-secondary);
    font-size: 0.9em;
    margin: 8px 0 0 0;
}

/* Sidebar */
.sidebar {
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    padding: 20px;
    box-shadow: var(--box-shadow);
    display: flex;
    flex-direction: column;
    gap: 20px;
    height: fit-content;
    position: sticky;
    top: 20px;
    border: 1px solid var(--border-color);
}

.sidebar h3 {
    color: var(--text-primary);
    font-size: 1.1em;
    margin-bottom: 12px;
    border-bottom: 2px solid var(--secondary-color);
    padding-bottom: 8px;
}

.time-controls select {
    width: 100%;
    padding: 10px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1em;
    cursor: pointer;
    background: var(--bg-primary);
    color: var(--text-primary);
}

.room-info p {
    margin: 10px 0;
    font-size: 0.95em;
    color: var(--text-primary);
}

.status-indicator {
    display: inline-block;
    padding: 4px 8px;
    border-radius: 4px;
    font-weight: bold;
    font-size: 0.9em;
}

.status-waiting {
    background-color: #fff3cd;
    color: #856404;
}

.status-playing {
    background-color: #d4edda;
    color: #155724;
}

.status-finished {
    background-color: #f8d7da;
    color: #721c24;
}

.room-controls {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.room-controls .btn {
    width: 100%;
    padding: 10px;
    font-size: 0.9em;
}

.captured-pieces p {
    margin: 8px 0;
    font-size: 0.95em;
    color: var(--text-primary);
}

.moves-list-container {
    max-height: 300px;
    overflow-y: auto;
    font-size: 0.9em;
    color: var(--text-primary);
}

.move-item {
    padding: 4px;
    margin: 4px 0;
    background: var(--bg-tertiary);
    border-radius: 4px;
    padding-left: 8px;
    border-left: 3px solid var(--secondary-color);
    color: var(--text-primary);
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal.hidden {
    display: none;
}

.modal-content {
    background: var(--bg-secondary);
    padding: 40px;
    border-radius: var(--border-radius);
    text-align: center;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.5);
    max-width: 500px;
    border: 1px solid var(--border-color);
}

.modal-content h2 {
    color: var(--text-primary);
    font-size: 2em;
    margin-bottom: 15px;
}

.modal-content p {
    color: var(--text-secondary);
    font-size: 1.1em;
    margin-bottom: 30px;
}

.modal-content .btn {
    margin: 10px;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .game-container {
        grid-template-columns: 1fr;
    }

    .sidebar {
        position: static;
    }

    .chessboard {
        max-width: 100%;
    }
}

@media (max-width: 768px) {
    .auth-section {
        padding: 40px 20px;
    }

    .auth-section h1 {
        font-size: 2em;
    }

    .header {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }

    .square {
        font-size: 2em;
    }

    .sidebar {
        gap: 15px;
    }

    .sidebar h3 {
        font-size: 1em;
    }
}

@media (max-width: 500px) {
    .chessboard {
        max-width: 90vw;
    }

    .square {
        font-size: 1.5em;
    }

    .btn {
        padding: 10px 20px;
        font-size: 0.9em;
    }
}

/* Scrollbar Styling */
.moves-list-container::-webkit-scrollbar {
    width: 6px;
}

.moves-list-container::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 4px;
}

.moves-list-container::-webkit-scrollbar-thumb {
    background: var(--secondary-color);
    border-radius: 4px;
}

.moves-list-container::-webkit-scrollbar-thumb:hover {
    background: #c0392b;
}

/* Animations */
@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.auth-section,
.game-section {
    animation: slideIn 0.5s ease;
}

/* Tabs */
.tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    border-bottom: 2px solid var(--border-color);
}

.tab-btn {
    padding: 12px 20px;
    background: none;
    border: none;
    border-bottom: 3px solid transparent;
    cursor: pointer;
    font-size: 1em;
    font-weight: 600;
    color: var(--text-secondary);
    transition: var(--transition);
}

.tab-btn.active {
    color: var(--secondary-color);
    border-bottom-color: var(--secondary-color);
}

.tab-btn:hover {
    color: var(--text-primary);
}

.tab-content {
    display: none;
}

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

/* Lobby */
.lobby-container {
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    padding: 25px;
    box-shadow: var(--box-shadow);
    border: 1px solid var(--border-color);
}

.lobby-container h2 {
    color: var(--text-primary);
    margin-bottom: 20px;
    font-size: 1.8em;
}

.lobby-container .input-field {
    margin-bottom: 20px;
    max-width: 400px;
}

/* Players List */
.players-list-container {
    background: var(--bg-tertiary);
    border-radius: var(--border-radius);
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.players-header {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 2fr;
    gap: 15px;
    padding: 15px 20px;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.95em;
    border-bottom: 2px solid var(--border-color);
}

.players-list {
    max-height: 600px;
    overflow-y: auto;
}

.player-row {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 2fr;
    gap: 15px;
    padding: 15px 20px;
    border-bottom: 1px solid var(--border-color);
    align-items: center;
    background: var(--bg-secondary);
    transition: var(--transition);
}

.player-row:hover {
    background: var(--bg-tertiary);
}

.col-name {
    font-weight: 600;
    color: var(--text-primary);
}

.col-rating {
    background: var(--bg-primary);
    padding: 6px 10px;
    border-radius: 4px;
    font-weight: 600;
    text-align: center;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.col-status {
    text-align: center;
}

.status-online {
    display: inline-block;
    width: 10px;
    height: 10px;
    background: #27ae60;
    border-radius: 50%;
    margin-right: 5px;
}

.status-offline {
    display: inline-block;
    width: 10px;
    height: 10px;
    background: #999;
    border-radius: 50%;
    margin-right: 5px;
}

.col-actions {
    display: flex;
    gap: 8px;
}

.btn-xs {
    padding: 6px 12px;
    font-size: 0.8em;
    min-width: 70px;
    white-space: nowrap;
}

/* Notifications Panel */
.notifications-panel {
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    padding: 20px;
    margin: 20px 0;
    border: 1px solid var(--border-color);
    border-left: 4px solid var(--secondary-color);
}

.notifications-panel h3 {
    color: var(--text-primary);
    margin-bottom: 15px;
    font-size: 1.1em;
}

.notifications-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.notification-item {
    background: var(--bg-tertiary);
    padding: 15px;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    animation: slideIn 0.3s ease;
}

.notification-item:hover {
    background: var(--bg-primary);
}

.notification-info {
    flex: 1;
}

.notification-from {
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: 5px;
}

.notification-rating {
    color: var(--text-secondary);
    font-size: 0.9em;
}

.notification-actions {
    display: flex;
    gap: 8px;
}

.btn-accept {
    background-color: var(--success-color);
    color: white;
    padding: 8px 16px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
}

.btn-accept:hover {
    background-color: #3da35d;
}

.btn-decline {
    background-color: var(--danger-color);
    color: white;
    padding: 8px 16px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
}

.btn-decline:hover {
    background-color: #cc0000;
}

.no-notifications {
    color: var(--text-secondary);
    text-align: center;
    padding: 20px;
    font-style: italic;
}

/* Settings Modal */
.settings-modal {
    max-width: 600px;
    max-height: 80vh;
    overflow-y: auto;
}

.settings-modal h2 {
    color: var(--text-primary);
    margin-bottom: 20px;
}

.settings-group {
    margin-bottom: 25px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
}

.settings-group:last-of-type {
    border-bottom: none;
}

.settings-group h3 {
    color: var(--text-primary);
    font-size: 1em;
    margin-bottom: 15px;
}

.setting-item {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 12px;
}

.setting-item label {
    color: var(--text-primary);
    font-weight: 600;
    min-width: 150px;
}

.color-picker {
    width: 60px;
    height: 40px;
    border: 2px solid var(--border-color);
    border-radius: 4px;
    cursor: pointer;
}

.settings-actions {
    display: flex;
    gap: 10px;
    margin-top: 25px;
    flex-wrap: wrap;
}

.settings-actions .btn {
    flex: 1;
    min-width: 120px;
}

/* ==================== LEADERBOARD ==================== */

.leaderboard-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.leaderboard-row {
    display: grid;
    grid-template-columns: 0.5fr 2fr 1.5fr 0.5fr;
    gap: 15px;
    padding: 12px 15px;
    background: var(--bg-tertiary);
    border-radius: 6px;
    align-items: center;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.leaderboard-row:hover {
    background: var(--bg-primary);
    transform: translateX(5px);
}

.rank {
    font-weight: 900;
    color: var(--secondary-color);
    font-size: 1.1em;
}

.player-name {
    color: var(--text-primary);
    font-weight: 600;
}

.player-rating {
    color: #ffd700;
    font-weight: 600;
}

.status-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: 2px solid var(--border-color);
}

.status-dot.online {
    background-color: #27ae60;
}

.status-dot.ingame {
    background-color: #e74c3c;
}

/* ==================== GAME HISTORY ==================== */

.history-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.history-row {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: 15px;
    padding: 12px 15px;
    background: var(--bg-tertiary);
    border-radius: 6px;
    align-items: center;
    border: 1px solid var(--border-color);
}

.history-date {
    color: var(--text-secondary);
    font-size: 0.9em;
}

.history-result {
    font-weight: 600;
    color: var(--text-primary);
}

.history-moves {
    color: var(--text-secondary);
}

/* ==================== CHAT ==================== */

.chat-container {
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    padding: 15px;
    display: flex;
    flex-direction: column;
    height: 300px;
    border: 1px solid var(--border-color);
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    margin-bottom: 10px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.chat-message {
    padding: 8px 12px;
    background: var(--bg-tertiary);
    border-radius: 6px;
    max-width: 80%;
    word-wrap: break-word;
}

.chat-message.own {
    align-self: flex-end;
    background: var(--secondary-color);
    color: white;
}

.chat-message.opponent {
    align-self: flex-start;
    background: var(--bg-primary);
    color: var(--text-primary);
}

.chat-player {
    font-weight: 600;
    margin-right: 5px;
}

.chat-input-box {
    display: flex;
    gap: 8px;
}

.chat-input-box input {
    flex: 1;
    padding: 8px 12px;
    background: var(--bg-primary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 0.9em;
}

.chat-input-box button {
    padding: 8px 16px;
    background: var(--secondary-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 600;
}

/* ==================== SOUND TOGGLE ==================== */

.sound-toggle {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
    background: var(--secondary-color);
    border: none;
    border-radius: 50%;
    color: white;
    font-size: 1.5em;
    cursor: pointer;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
    transition: var(--transition);
    z-index: 100;
}

.sound-toggle:hover {
    transform: scale(1.1);
}

/* ==================== MOBILE RESPONSIVE ==================== */

@media (max-width: 1200px) {
    .game-container {
        grid-template-columns: 1fr;
    }

    .sidebar {
        position: static;
        max-height: 400px;
    }

    .tabs {
        flex-wrap: wrap;
    }

    .leaderboard-row,
    .history-row {
        grid-template-columns: 1fr;
        gap: 5px;
        padding: 10px;
    }
}

@media (max-width: 768px) {
    body {
        padding: 10px;
    }

    .container {
        max-width: 100%;
    }

    .auth-section {
        padding: 30px 15px;
    }

    .auth-section h1 {
        font-size: 2em;
    }

    .header {
        flex-direction: column;
        gap: 10px;
    }

    .chessboard {
        max-width: 100%;
        min-width: 250px;
    }

    .square {
        font-size: 1.5em;
    }

    .game-container {
        gap: 15px;
    }

    .sidebar {
        gap: 10px;
        padding: 10px;
    }

    .sidebar h3 {
        font-size: 0.95em;
    }

    .players-header,
    .player-row {
        grid-template-columns: 1fr 1fr !important;
        gap: 10px !important;
    }

    .col-rating,
    .col-status {
        display: none;
    }

    .col-actions {
        grid-column: span 2;
    }

    .tabs {
        overflow-x: auto;
        gap: 5px;
    }

    .tab-btn {
        padding: 10px 12px;
        font-size: 0.9em;
        white-space: nowrap;
    }

    .notifications-panel {
        padding: 15px;
        margin: 10px 0;
    }

    .notification-item {
        flex-direction: column;
        align-items: flex-start;
    }

    .notification-actions {
        width: 100%;
        gap: 5px;
    }

    .notification-actions button {
        flex: 1;
    }

    .chat-container {
        height: 200px;
    }

    .player-info-top,
    .player-info-bottom {
        flex-direction: column;
        gap: 10px;
    }

    .sound-toggle {
        bottom: 10px;
        right: 10px;
        width: 45px;
        height: 45px;
        font-size: 1.2em;
    }

    .modal-content {
        width: 90%;
        max-width: 100%;
        padding: 20px;
    }

    .settings-modal {
        max-height: 90vh;
    }
}

@media (max-width: 500px) {
    .auth-section h1 {
        font-size: 1.5em;
    }

    .input-field {
        font-size: 16px;
    }

    .btn {
        padding: 10px 15px;
        font-size: 0.9em;
    }

    .btn-xs {
        padding: 5px 10px;
        font-size: 0.75em;
        min-width: 50px;
    }

    .chessboard {
        max-width: 95vw;
        min-width: 95vw;
    }

    .header {
        padding: 15px 10px;
    }

    .tab-btn {
        padding: 8px 10px;
        font-size: 0.8em;
    }

    .leaderboard-row,
    .history-row {
        padding: 8px;
        font-size: 0.9em;
    }

    .notification-item {
        padding: 10px;
    }
}