/* UNO Game - Mobile-First Styles */

:root {
    /* UNO Colors */
    --uno-red: #ff5555;
    --uno-blue: #5555ff;
    --uno-green: #55aa55;
    --uno-yellow: #ffaa00;
    --uno-black: #1a1a2e;
    --uno-white: #ffffff;

    /* UI Colors */
    --bg-primary: #0f0f23;
    --bg-secondary: #1a1a2e;
    --bg-card: #16213e;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --accent: #e94560;
    --success: #4ecca3;
    --warning: #ffc107;
    --danger: #ff5555;

    /* Sizing */
    --card-width: 60px;
    --card-height: 90px;
    --card-radius: 8px;
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
}

/* Reset & Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

html, body {
    height: 100%;
    overflow: hidden;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.4;
    touch-action: manipulation;
}

/* Screens */
.screen {
    display: none;
    height: 100%;
    width: 100%;
    position: absolute;
    top: 0;
    left: 0;
}

.screen.active {
    display: flex;
}

/* Buttons */
.btn {
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.1s, opacity 0.2s;
    touch-action: manipulation;
}

.btn:active {
    transform: scale(0.95);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

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

.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--text-secondary);
}

.btn-large {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 18px;
    width: 100%;
    max-width: 300px;
}

.btn-uno {
    background: var(--uno-red);
    color: white;
    font-size: 14px;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: 50px;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

/* ==================== LOGIN SCREEN ==================== */
.login-container {
    width: 100%;
    max-width: 400px;
    margin: auto;
    padding: var(--spacing-lg);
    text-align: center;
}

.game-title {
    font-size: 64px;
    font-weight: 900;
    background: linear-gradient(45deg, var(--uno-red), var(--uno-yellow), var(--uno-green), var(--uno-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-xs);
    text-shadow: 0 4px 20px rgba(233, 69, 96, 0.3);
}

.subtitle {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
}

.form-group {
    margin-bottom: var(--spacing-lg);
    text-align: left;
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
    color: var(--text-secondary);
}

.form-group input[type="text"] {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--bg-secondary);
    border-radius: 8px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 16px;
    transition: border-color 0.2s;
}

.form-group input[type="text"]:focus {
    outline: none;
    border-color: var(--accent);
}

.avatar-upload {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.avatar-preview {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: var(--bg-secondary);
    border: 2px dashed var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    cursor: pointer;
}

.avatar-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.avatar-placeholder {
    font-size: 32px;
    color: var(--text-secondary);
}

.avatar-upload input[type="file"] {
    display: none;
}

.avatar-hint {
    color: var(--text-secondary);
    font-size: 14px;
}

.game-info {
    margin-top: var(--spacing-xl);
    color: var(--text-secondary);
    font-size: 14px;
}

/* ==================== LOBBY SCREEN ==================== */
.lobby-container {
    width: 100%;
    max-width: 400px;
    margin: auto;
    padding: var(--spacing-lg);
    text-align: center;
}

.lobby-container h2 {
    margin-bottom: var(--spacing-lg);
}

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

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

.players-waiting {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    margin: var(--spacing-lg) 0;
}

.player-slot {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
}

.player-avatar {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--bg-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: bold;
    overflow: hidden;
    border: 3px solid var(--accent);
}

.player-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.player-avatar.empty {
    border-style: dashed;
    opacity: 0.5;
}

.player-name {
    font-size: 12px;
    color: var(--text-secondary);
    max-width: 80px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.waiting-text {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

#leave-lobby-btn {
    margin-top: var(--spacing-md);
}

/* ==================== GAME SCREEN ==================== */
.game-container {
    display: flex;
    flex-direction: column;
    height: 100%;
    width: 100%;
    padding: var(--spacing-sm);
    padding-bottom: env(safe-area-inset-bottom, var(--spacing-sm));
}

/* Opponents Bar */
.opponents-bar {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    padding: var(--spacing-sm);
    background: var(--bg-secondary);
    border-radius: 12px;
    margin-bottom: var(--spacing-sm);
    min-height: 70px;
}

.opponent {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs);
    border-radius: 8px;
    transition: all 0.3s;
}

.opponent.active {
    background: rgba(233, 69, 96, 0.2);
    box-shadow: 0 0 10px var(--accent);
}

.opponent .player-avatar {
    width: 40px;
    height: 40px;
    font-size: 16px;
    border-width: 2px;
}

.opponent .player-name {
    font-size: 10px;
    max-width: 60px;
}

.opponent .card-count {
    background: var(--bg-primary);
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 11px;
    font-weight: bold;
}

.opponent .uno-badge {
    background: var(--uno-red);
    color: white;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 9px;
    font-weight: bold;
    animation: pulse 1s infinite;
}

/* Game Area */
.game-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    min-height: 0;
}

.game-info-bar {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    width: 100%;
}

.direction-indicator {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--bg-secondary);
    border-radius: 20px;
    font-size: 14px;
}

.direction-indicator .arrow {
    font-size: 20px;
    transition: transform 0.3s;
}

.direction-indicator.counter-clockwise .arrow {
    transform: scaleX(-1);
}

.draw-pile-count {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--bg-secondary);
    border-radius: 20px;
}

.draw-pile-count .count {
    font-weight: bold;
    font-size: 16px;
}

.draw-pile-count .label {
    font-size: 10px;
    color: var(--text-secondary);
}

/* Card Piles */
.card-piles {
    display: flex;
    gap: var(--spacing-xl);
    align-items: center;
}

.draw-pile, .discard-pile {
    position: relative;
}

.draw-pile {
    cursor: pointer;
}

.draw-pile:active .card {
    transform: scale(0.95);
}

/* Cards */
.card {
    width: var(--card-width);
    height: var(--card-height);
    border-radius: var(--card-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 24px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
    position: relative;
    transition: transform 0.2s;
    user-select: none;
}

.card-back {
    background: linear-gradient(135deg, #1a1a2e 0%, #0f0f23 100%);
    border: 3px solid #333;
    color: var(--accent);
    font-size: 14px;
}

.card-red { background: linear-gradient(135deg, var(--uno-red) 0%, #cc4444 100%); color: white; }
.card-blue { background: linear-gradient(135deg, var(--uno-blue) 0%, #4444cc 100%); color: white; }
.card-green { background: linear-gradient(135deg, var(--uno-green) 0%, #448844 100%); color: white; }
.card-yellow { background: linear-gradient(135deg, var(--uno-yellow) 0%, #cc8800 100%); color: #333; }
.card-wild {
    background: linear-gradient(135deg, var(--uno-red) 0%, var(--uno-blue) 33%, var(--uno-green) 66%, var(--uno-yellow) 100%);
    color: white;
}

.card .card-value {
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
}

.card .card-symbol {
    font-size: 18px;
}

/* Current Color */
.current-color {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--bg-secondary);
    border-radius: 20px;
    font-size: 12px;
}

.color-badge {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    border: 2px solid white;
}

.color-badge.red { background: var(--uno-red); }
.color-badge.blue { background: var(--uno-blue); }
.color-badge.green { background: var(--uno-green); }
.color-badge.yellow { background: var(--uno-yellow); }

/* Turn Timer */
.turn-timer {
    width: 100%;
    max-width: 200px;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.timer-bar {
    flex: 1;
    height: 8px;
    background: var(--bg-secondary);
    border-radius: 4px;
    overflow: hidden;
}

.timer-fill {
    height: 100%;
    background: var(--success);
    border-radius: 4px;
    transition: width 0.1s linear, background-color 0.3s;
    width: 100%;
}

.timer-fill.warning {
    background: var(--warning);
}

.timer-fill.danger {
    background: var(--danger);
}

.timer-text {
    font-weight: bold;
    font-size: 14px;
    min-width: 24px;
    text-align: center;
}

/* Player Hand */
.player-hand-container {
    padding: var(--spacing-sm) 0;
    background: var(--bg-secondary);
    border-radius: 12px 12px 0 0;
    margin: 0 calc(-1 * var(--spacing-sm));
    margin-bottom: calc(-1 * var(--spacing-sm));
    padding-bottom: calc(var(--spacing-sm) + env(safe-area-inset-bottom, 0));
}

.hand-actions {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    padding: var(--spacing-sm);
}

.player-hand {
    display: flex;
    justify-content: center;
    padding: var(--spacing-sm);
    overflow-x: auto;
    gap: calc(-1 * var(--spacing-lg));
    -webkit-overflow-scrolling: touch;
    scroll-snap-type: x proximity;
}

.player-hand .card {
    flex-shrink: 0;
    cursor: pointer;
    scroll-snap-align: center;
    transition: transform 0.2s, margin 0.2s;
}

.player-hand .card:hover,
.player-hand .card:focus {
    transform: translateY(-10px);
    z-index: 10;
}

.player-hand .card.selected {
    transform: translateY(-20px);
    box-shadow: 0 8px 16px rgba(233, 69, 96, 0.5);
}

.player-hand .card.playable {
    border: 2px solid var(--success);
}

.player-hand .card.not-playable {
    opacity: 0.6;
}

/* ==================== MODALS ==================== */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--bg-secondary);
    padding: var(--spacing-xl);
    border-radius: 16px;
    text-align: center;
    max-width: 90%;
    width: 300px;
}

.modal-content h2, .modal-content h3 {
    margin-bottom: var(--spacing-lg);
}

/* Color Picker */
.color-picker {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.color-btn {
    width: 80px;
    height: 80px;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    transition: transform 0.2s;
}

.color-btn:active {
    transform: scale(0.9);
}

.color-btn.color-red { background: var(--uno-red); }
.color-btn.color-blue { background: var(--uno-blue); }
.color-btn.color-green { background: var(--uno-green); }
.color-btn.color-yellow { background: var(--uno-yellow); }

/* Game Over */
#game-over-modal .modal-content {
    width: 320px;
}

#game-over-title {
    font-size: 28px;
}

#game-over-message {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

/* ==================== TOAST NOTIFICATIONS ==================== */
#toast-container {
    position: fixed;
    top: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    pointer-events: none;
}

.toast {
    background: var(--bg-secondary);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    animation: slideIn 0.3s ease, fadeOut 0.3s ease 2.7s;
    max-width: 300px;
    text-align: center;
}

.toast.success { border-left: 4px solid var(--success); }
.toast.error { border-left: 4px solid var(--danger); }
.toast.warning { border-left: 4px solid var(--warning); }
.toast.info { border-left: 4px solid var(--accent); }

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

@keyframes fadeOut {
    to {
        opacity: 0;
    }
}

/* ==================== RESPONSIVE ==================== */
@media (min-width: 480px) {
    :root {
        --card-width: 70px;
        --card-height: 105px;
    }
}

@media (min-width: 768px) {
    :root {
        --card-width: 80px;
        --card-height: 120px;
    }

    .opponents-bar {
        gap: var(--spacing-xl);
    }

    .opponent .player-avatar {
        width: 50px;
        height: 50px;
    }

    .player-hand {
        gap: calc(-1 * var(--spacing-md));
    }
}

/* Landscape orientation on mobile */
@media (max-height: 500px) and (orientation: landscape) {
    :root {
        --card-width: 50px;
        --card-height: 75px;
    }

    .game-container {
        flex-direction: row;
        flex-wrap: wrap;
    }

    .opponents-bar {
        width: 100%;
        min-height: 50px;
    }

    .game-area {
        flex: 1;
        min-width: 50%;
    }

    .player-hand-container {
        width: 100%;
    }
}

/* Safe area for notched phones */
@supports (padding: max(0px)) {
    .game-container {
        padding-left: max(var(--spacing-sm), env(safe-area-inset-left));
        padding-right: max(var(--spacing-sm), env(safe-area-inset-right));
    }
}