/* ========================================
   SuperBNBrother - Modern Design System
   ======================================== */

:root {
    --font-cn: 'Microsoft YaHei', 'PingFang SC', sans-serif;
    --font-en: 'Calibri', 'Segoe UI', sans-serif;
    --font-mono: 'SF Mono', 'Consolas', monospace;
    
    /* Binance Brand Colors */
    --bnb-gold: #F0B90B;
    --bnb-gold-light: #F8D56B;
    --bnb-gold-dark: #C9A227;
    --bnb-dark: #1E2026;
    --bnb-darker: #0B0E11;
    --bnb-surface: #2B3139;
    --bnb-surface-light: #3D4652;
    --bnb-border: #474D57;
    --bnb-text: #EAECEF;
    --bnb-text-muted: #848E9C;
    --bnb-green: #0ECB81;
    --bnb-red: #F6465D;
    
    /* Gradients */
    --gradient-gold: linear-gradient(135deg, #F0B90B 0%, #F8D56B 100%);
    --gradient-dark: linear-gradient(180deg, #1E2026 0%, #0B0E11 100%);
    --gradient-card: linear-gradient(135deg, #2B3139 0%, #1E2026 100%);
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.3);
    --shadow-gold: 0 4px 20px rgba(240, 185, 11, 0.2);
    --shadow-glow: 0 0 40px rgba(240, 185, 11, 0.15);
}

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

body {
    background: var(--bnb-darker);
    min-height: 100vh;
    font-family: var(--font-cn), var(--font-en);
    color: var(--bnb-text);
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

#screen {
    display: block;
    image-rendering: pixelated;
    margin: auto;
}

.aspect-16-9 {
    width: 90vw;
    max-width: 177.7vh;
    height: auto;
    aspect-ratio: 16/9;
}

.hidden { display: none !important; }

/* ========================================
   Main Menu Layout
   ======================================== */

.menu {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    padding: 24px 32px;
    max-width: 1400px;
    margin: 0 auto;
}

/* Header */
.menu-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--bnb-border);
    margin-bottom: 24px;
}

.brand h1 {
    font-family: var(--font-en);
    font-size: 28px;
    font-weight: 900;
    color: var(--bnb-gold);
    margin: 0;
    letter-spacing: 2px;
    text-transform: uppercase;
    text-shadow: 0 0 20px rgba(240, 185, 11, 0.3);
}

.brand .tagline {
    font-size: 12px;
    color: var(--bnb-text-muted);
    letter-spacing: 1px;
}

/* Wallet Quick View */
.wallet-quick-view {
    display: flex;
    align-items: center;
    gap: 16px;
}

.sbnb-balance-mini {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: var(--gradient-card);
    border: 1px solid var(--bnb-border);
    border-radius: 20px;
}

.balance-icon {
    font-size: 14px;
}

.balance-value {
    font-family: var(--font-en);
    font-size: 16px;
    font-weight: 700;
    color: var(--bnb-gold);
}

.balance-unit {
    font-size: 11px;
    color: var(--bnb-text-muted);
}

.wallet-btn {
    padding: 10px 20px;
    background: var(--gradient-gold);
    color: var(--bnb-dark);
    border: none;
    border-radius: 20px;
    font-family: var(--font-cn);
    font-size: 13px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s ease;
}

.wallet-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-gold);
}

.wallet-btn.connected {
    background: var(--bnb-surface);
    color: var(--bnb-green);
    border: 1px solid var(--bnb-green);
}

/* Menu Content */
.menu-content {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 32px;
    flex: 1;
}

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

.section-title {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 16px;
    font-weight: 600;
    color: var(--bnb-text);
}

.title-icon {
    font-size: 18px;
}

/* World Sections */
.levels-grid {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.world-section {
    background: var(--gradient-card);
    border: 1px solid var(--bnb-border);
    border-radius: 16px;
    padding: 16px;
}

.world-label {
    font-size: 11px;
    font-weight: 700;
    color: var(--bnb-text-muted);
    letter-spacing: 2px;
    margin-bottom: 12px;
    padding-left: 4px;
}

.world-levels {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
}

.world-section:last-child .world-levels {
    grid-template-columns: repeat(3, 1fr);
}

/* Level Cards */
.level-card {
    position: relative;
    background: var(--bnb-darker);
    border: 1px solid var(--bnb-border);
    border-radius: 12px;
    padding: 14px 12px;
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: left;
    font-family: inherit;
    color: inherit;
    overflow: hidden;
}

.level-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-gold);
    opacity: 0;
    transition: opacity 0.2s;
}

.level-card:hover {
    border-color: var(--bnb-gold);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.level-card:hover::before {
    opacity: 1;
}

.level-card.completed {
    border-color: var(--bnb-green);
}

.level-card.completed .level-status {
    background: var(--bnb-green);
}

.level-status {
    position: absolute;
    top: 10px;
    right: 10px;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--bnb-border);
}

.level-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.level-num {
    font-family: var(--font-en);
    font-size: 18px;
    font-weight: 700;
    color: var(--bnb-gold);
}

.level-name {
    font-size: 12px;
    color: var(--bnb-gold);
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.level-card:hover .level-name {
    color: var(--bnb-gold-light);
}

/* Infinite Mode Card */
.infinite-card {
    position: relative;
    background: linear-gradient(135deg, rgba(240, 185, 11, 0.1) 0%, rgba(14, 203, 129, 0.05) 100%);
    border: 1px solid var(--bnb-gold);
    border-radius: 16px;
    padding: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: left;
    font-family: inherit;
    color: inherit;
    overflow: hidden;
}

.infinite-glow {
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(240, 185, 11, 0.1) 0%, transparent 70%);
    animation: rotate 10s linear infinite;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.infinite-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-gold), 0 0 60px rgba(240, 185, 11, 0.2);
}

.infinite-content {
    position: relative;
    display: flex;
    align-items: center;
    gap: 16px;
}

.infinite-icon {
    font-size: 32px;
}

.infinite-info {
    flex: 1;
}

.infinite-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--bnb-gold);
    margin-bottom: 4px;
}

.infinite-desc {
    font-size: 12px;
    color: var(--bnb-text-muted);
}

.infinite-reward {
    text-align: right;
}

.reward-label {
    display: block;
    font-size: 10px;
    color: var(--bnb-text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.reward-value {
    font-family: var(--font-en);
    font-size: 18px;
    font-weight: 700;
    color: var(--bnb-green);
}

/* Sidebar */
.sidebar {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

/* Balance Card */
.balance-card {
    background: var(--gradient-card);
    border: 1px solid var(--bnb-border);
    border-radius: 16px;
    padding: 20px;
}

.balance-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.balance-label {
    font-size: 13px;
    color: var(--bnb-text-muted);
}

.network-badge {
    padding: 4px 10px;
    background: rgba(14, 203, 129, 0.1);
    color: var(--bnb-green);
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 1px;
    border-radius: 10px;
    border: 1px solid rgba(14, 203, 129, 0.3);
}

.balance-main {
    display: flex;
    align-items: baseline;
    gap: 8px;
    margin-bottom: 16px;
}

.balance-amount {
    font-family: var(--font-en);
    font-size: 36px;
    font-weight: 700;
    color: var(--bnb-gold);
    text-shadow: 0 0 20px rgba(240, 185, 11, 0.3);
}

.balance-unit {
    font-size: 14px;
    color: var(--bnb-text-muted);
}

.balance-breakdown {
    display: flex;
    align-items: center;
    gap: 12px;
    padding-top: 16px;
    border-top: 1px solid var(--bnb-border);
}

.breakdown-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.breakdown-label {
    font-size: 11px;
    color: var(--bnb-text-muted);
}

.breakdown-value {
    font-family: var(--font-en);
    font-size: 16px;
    font-weight: 600;
    color: var(--bnb-text);
}

.breakdown-value.pending {
    color: var(--bnb-gold);
}

.breakdown-divider {
    width: 1px;
    height: 24px;
    background: var(--bnb-border);
}

/* Action Card */
.action-card {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.action-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px;
    border: none;
    border-radius: 12px;
    font-family: var(--font-cn);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.action-btn.primary {
    background: var(--gradient-gold);
    color: var(--bnb-dark);
    box-shadow: var(--shadow-gold);
}

.action-btn.primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(240, 185, 11, 0.4);
}

.action-btn.secondary {
    background: var(--bnb-surface);
    color: var(--bnb-text);
    border: 1px solid var(--bnb-border);
}

.action-btn.secondary:hover {
    border-color: var(--bnb-gold);
    background: var(--bnb-surface-light);
}

.btn-icon {
    font-size: 16px;
}

/* Stats Card */
.stats-card {
    background: var(--gradient-card);
    border: 1px solid var(--bnb-border);
    border-radius: 16px;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 12px;
}

.stat-icon {
    font-size: 20px;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bnb-darker);
    border-radius: 10px;
}

.stat-info {
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-family: var(--font-en);
    font-size: 18px;
    font-weight: 700;
    color: var(--bnb-text);
}

.stat-label {
    font-size: 11px;
    color: var(--bnb-text-muted);
}

/* Footer */
.menu-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 20px;
    border-top: 1px solid var(--bnb-border);
    margin-top: 24px;
}

.controls-hint {
    display: flex;
    gap: 20px;
}

.control-item {
    display: flex;
    align-items: center;
    gap: 8px;
}

.key {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 28px;
    height: 28px;
    padding: 0 8px;
    background: var(--bnb-surface);
    border: 1px solid var(--bnb-border);
    border-radius: 6px;
    font-family: var(--font-en);
    font-size: 11px;
    font-weight: 600;
    color: var(--bnb-gold);
}

.control-label {
    font-size: 12px;
    color: var(--bnb-text-muted);
}

.powered-by {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    color: var(--bnb-text-muted);
}

.bnb-logo {
    color: var(--bnb-gold);
    font-weight: 700;
}

/* ========================================
   Game Container
   ======================================== */

.game-container {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: var(--bnb-darker);
}

/* Game UI Overlay */
.game-ui-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
    z-index: 50;
}

.game-ui-overlay > * {
    pointer-events: auto;
}

/* Sound Toggle Button */
.sound-toggle-btn {
    position: absolute;
    top: 16px;
    right: 64px;
    width: 40px;
    height: 40px;
    background: var(--bnb-surface);
    border: 1px solid var(--bnb-border);
    border-radius: 10px;
    color: var(--bnb-text);
    font-size: 18px;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
}

.sound-toggle-btn:hover {
    border-color: var(--bnb-gold);
    background: var(--bnb-surface-light);
}

.sound-toggle-btn.muted {
    background: rgba(246, 70, 93, 0.1);
    border-color: var(--bnb-red);
}

/* Indicators */
.ai-mode-indicator {
    position: absolute;
    top: 16px;
    left: 16px;
    padding: 8px 16px;
    background: var(--bnb-red);
    color: var(--bnb-text);
    font-size: 12px;
    font-weight: 700;
    border-radius: 20px;
    z-index: 100;
    opacity: 0;
    transition: opacity 0.3s;
    letter-spacing: 1px;
}

.ai-mode-indicator.active {
    opacity: 1;
    animation: pulse-glow 1.5s ease-in-out infinite;
}

@keyframes pulse-glow {
    0%, 100% { box-shadow: 0 0 0 0 rgba(246, 70, 93, 0.4); }
    50% { box-shadow: 0 0 0 10px rgba(246, 70, 93, 0); }
}

.mute-indicator {
    position: absolute;
    top: 64px;
    left: 16px;
    padding: 6px 12px;
    background: var(--bnb-surface);
    border: 1px solid var(--bnb-border);
    color: var(--bnb-text-muted);
    font-size: 11px;
    font-weight: 600;
    border-radius: 16px;
    z-index: 100;
    opacity: 0;
    transition: opacity 0.3s;
}

.mute-indicator.active {
    opacity: 1;
}

/* Game SBNB Counter */
.game-sbnb-counter {
    position: absolute;
    top: 16px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: rgba(30, 32, 38, 0.9);
    border: 1px solid var(--bnb-gold);
    border-radius: 20px;
    z-index: 100;
}

.sbnb-icon {
    font-size: 14px;
}

.sbnb-value {
    font-family: var(--font-en);
    font-size: 16px;
    font-weight: 700;
    color: var(--bnb-gold);
}

/* Menu Toggle Button */
.menu-toggle-btn {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 40px;
    height: 40px;
    background: var(--bnb-surface);
    border: 1px solid var(--bnb-border);
    border-radius: 10px;
    color: var(--bnb-text);
    font-size: 16px;
    cursor: pointer;
    transition: all 0.2s ease;
    z-index: 100;
}

.menu-toggle-btn:hover {
    border-color: var(--bnb-gold);
    color: var(--bnb-gold);
}

/* In-game Menu */
.in-game-menu {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(11, 14, 17, 0.95);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 200;
    backdrop-filter: blur(8px);
}

.menu-panel {
    background: var(--gradient-card);
    border: 1px solid var(--bnb-border);
    padding: 32px;
    text-align: center;
    border-radius: 20px;
    min-width: 280px;
    box-shadow: var(--shadow-md);
}

.menu-panel h3 {
    color: var(--bnb-gold);
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 24px;
    margin-top: 0;
    letter-spacing: 2px;
}

.menu-btn {
    display: block;
    width: 100%;
    background: var(--bnb-darker);
    border: 1px solid var(--bnb-border);
    color: var(--bnb-text);
    font-family: var(--font-cn), var(--font-en);
    font-size: 14px;
    font-weight: 600;
    padding: 14px 24px;
    margin: 8px 0;
    cursor: pointer;
    transition: all 0.2s ease;
    border-radius: 10px;
}

.menu-btn:hover {
    border-color: var(--bnb-gold);
    color: var(--bnb-gold);
    background: var(--bnb-surface);
}

#sound-status {
    color: var(--bnb-green);
}

#sound-status.muted {
    color: var(--bnb-red);
}

/* ========================================
   Responsive Design
   ======================================== */

@media (max-width: 1024px) {
    .menu {
        padding: 20px 24px;
    }
    
    .menu-content {
        grid-template-columns: 1fr;
    }
    
    .sidebar {
        flex-direction: row;
        flex-wrap: wrap;
    }
    
    .sidebar > * {
        flex: 1;
        min-width: 280px;
    }
}

@media (max-width: 768px) {
    .menu-header {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
    
    .world-levels {
        grid-template-columns: repeat(2, 1fr) !important;
    }
    
    .controls-hint {
        flex-wrap: wrap;
        gap: 12px;
    }
    
    .menu-footer {
        flex-direction: column;
        gap: 16px;
    }
}

@media (max-width: 480px) {
    .menu {
        padding: 16px;
    }
    
    .brand h1 {
        font-size: 22px;
    }
    
    .world-levels {
        grid-template-columns: 1fr !important;
    }
    
    .controls-hint {
        display: none;
    }
}