/* CSS Variables based on Telegram theme */
:root {
    --bg-color: var(--tg-theme-bg-color, #ffffff);
    --text-color: var(--tg-theme-text-color, #000000);
    --hint-color: var(--tg-theme-hint-color, #999999);
    --link-color: var(--tg-theme-link-color, #2481cc);
    --button-color: var(--tg-theme-button-color, #2481cc);
    --button-text-color: var(--tg-theme-button-text-color, #ffffff);
    --secondary-bg: var(--tg-theme-secondary-bg-color, #f0f0f0);
    
    --success-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    
    --canvas-bg: #ffffff;
    --toolbar-bg: rgba(0, 0, 0, 0.05);
    --border-radius: 12px;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-tap-highlight-color: transparent;
    user-select: none;
}

#app {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Screens */
.screen {
    display: none;
    flex-direction: column;
    min-height: 100vh;
    padding: 16px;
    animation: fadeIn 0.3s ease;
}

.screen.active {
    display: flex;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* Loading Screen */
#loading-screen {
    justify-content: center;
    align-items: center;
}

.loader {
    width: 48px;
    height: 48px;
    border: 4px solid var(--secondary-bg);
    border-top-color: var(--button-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Error Screen */
#auth-error-screen {
    justify-content: center;
    align-items: center;
    text-align: center;
}

.error-icon {
    font-size: 64px;
    margin-bottom: 16px;
}

/* Buttons */
button {
    border: none;
    border-radius: var(--border-radius);
    padding: 14px 24px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    touch-action: manipulation;
}

button:active {
    transform: scale(0.98);
}

button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

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

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

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

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

.hidden {
    display: none !important;
}

/* Menu Screen */
.user-info {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px;
    background: var(--secondary-bg);
    border-radius: var(--border-radius);
    margin-bottom: 32px;
}

.avatar {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    object-fit: cover;
}

.user-details h3 {
    font-size: 18px;
    margin-bottom: 4px;
}

.user-details p {
    color: var(--hint-color);
    font-size: 14px;
}

.menu-buttons {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

/* Lobby Screen */
.lobby-header {
    text-align: center;
    margin-bottom: 24px;
}

.invite-code {
    font-size: 18px;
    margin-top: 8px;
}

.invite-code span {
    font-family: monospace;
    font-weight: bold;
    letter-spacing: 2px;
    color: var(--button-color);
}

.players-list {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 16px;
}

.player-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background: var(--secondary-bg);
    border-radius: var(--border-radius);
}

.player-item .avatar {
    width: 40px;
    height: 40px;
}

.player-item .name {
    flex: 1;
}

.player-item .status {
    font-size: 12px;
    padding: 4px 8px;
    border-radius: 12px;
}

.player-item .status.ready {
    background: var(--success-color);
    color: white;
}

.player-item .status.waiting {
    background: var(--warning-color);
    color: #333;
}

.lobby-actions {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

/* Game Screen */
.game-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px;
    background: var(--secondary-bg);
    border-radius: var(--border-radius);
    margin-bottom: 12px;
}

.round-info {
    display: flex;
    gap: 12px;
    align-items: center;
}

.timer {
    font-size: 24px;
    font-weight: bold;
    color: var(--button-color);
    min-width: 40px;
    text-align: center;
}

.timer.warning {
    color: var(--warning-color);
}

.timer.danger {
    color: var(--danger-color);
    animation: pulse 0.5s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.prompt-display {
    font-size: 16px;
}

.prompt-display strong {
    color: var(--button-color);
}

.canvas-container {
    display: flex;
    gap: 8px;
    flex: 1;
    min-height: 0;
}

.canvas-wrapper {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.canvas-wrapper.my-canvas {
    flex: 1.5;
}

.canvas-wrapper.opponent-canvas {
    flex: 1;
    opacity: 0.9;
}

.canvas-label {
    padding: 8px;
    text-align: center;
    font-size: 12px;
    font-weight: 600;
    background: var(--secondary-bg);
}

canvas {
    width: 100%;
    height: 100%;
    touch-action: none;
    background: var(--canvas-bg);
}

.toolbar {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background: var(--toolbar-bg);
    border-radius: var(--border-radius);
    margin-top: 12px;
}

.color-picker {
    display: flex;
    gap: 4px;
    flex-wrap: wrap;
}

.color-btn {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    border: 2px solid transparent;
    cursor: pointer;
    transition: transform 0.2s;
}

.color-btn.active {
    border-color: var(--text-color);
    transform: scale(1.1);
}

.brush-size {
    flex: 1;
}

.brush-size input[type="range"] {
    width: 100%;
    accent-color: var(--button-color);
}

.tools {
    display: flex;
    gap: 4px;
}

.tool-btn {
    width: 40px;
    height: 40px;
    padding: 8px;
    font-size: 18px;
    background: var(--secondary-bg);
}

.tool-btn.active {
    background: var(--button-color);
}

.sync-status {
    position: fixed;
    bottom: 80px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: rgba(0, 0, 0, 0.7);
    color: white;
    border-radius: 20px;
    font-size: 12px;
    opacity: 0;
    transition: opacity 0.3s;
}

.sync-status.visible {
    opacity: 1;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--success-color);
}

.sync-status.syncing .status-dot {
    background: var(--warning-color);
    animation: blink 0.5s infinite;
}

.sync-status.error .status-dot {
    background: var(--danger-color);
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

/* Results Screen */
.drawings-comparison {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
}

.drawing-card {
    flex: 1;
    background: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.drawing-card img {
    width: 100%;
    aspect-ratio: 4/3;
    object-fit: contain;
}

.drawing-card .info {
    padding: 12px;
    text-align: center;
}

.leaderboard, .final-leaderboard {
    background: var(--secondary-bg);
    border-radius: var(--border-radius);
    padding: 16px;
    margin-bottom: 16px;
}

.leaderboard-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

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

.leaderboard-item .rank {
    font-size: 24px;
    font-weight: bold;
    width: 40px;
    text-align: center;
}

.leaderboard-item .rank.gold { color: #FFD700; }
.leaderboard-item .rank.silver { color: #C0C0C0; }
.leaderboard-item .rank.bronze { color: #CD7F32; }

.leaderboard-item .score {
    font-weight: bold;
    color: var(--button-color);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--bg-color);
    padding: 24px;
    border-radius: var(--border-radius);
    width: 90%;
    max-width: 320px;
    text-align: center;
}

.modal-content h3 {
    margin-bottom: 16px;
}

.modal-content input {
    width: 100%;
    padding: 14px;
    font-size: 24px;
    text-align: center;
    text-transform: uppercase;
    letter-spacing: 4px;
    border: 2px solid var(--secondary-bg);
    border-radius: var(--border-radius);
    margin-bottom: 16px;
    font-family: monospace;
}

.modal-content input:focus {
    outline: none;
    border-color: var(--button-color);
}

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

.modal-actions button {
    flex: 1;
}

/* Toast */
.toast {
    position: fixed;
    bottom: 100px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: rgba(0, 0, 0, 0.85);
    color: white;
    padding: 12px 24px;
    border-radius: var(--border-radius);
    font-size: 14px;
    z-index: 2000;
    opacity: 0;
    transition: all 0.3s ease;
}

.toast.visible {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

/* Responsive */
@media (max-width: 480px) {
    .canvas-container {
        flex-direction: column;
    }
    
    .canvas-wrapper.my-canvas,
    .canvas-wrapper.opponent-canvas {
        flex: none;
        height: 40vh;
    }
    
    .canvas-wrapper.opponent-canvas {
        height: 25vh;
    }
}

/* Winner display */
.winner-display {
    text-align: center;
    padding: 32px;
    background: linear-gradient(135deg, #FFD700 0%, #FFA500 100%);
    border-radius: var(--border-radius);
    margin-bottom: 24px;
    color: #333;
}

.winner-display .crown {
    font-size: 64px;
    margin-bottom: 16px;
}

.winner-display h2 {
    font-size: 24px;
    margin-bottom: 8px;
}

.winner-display .score {
    font-size: 32px;
    font-weight: bold;
}