/**
 * YGaming v3.0.0 - Clean CSS
 * Mobile-first responsive design
 * Brand colors: Orange/Gold
 */

/* ===========================================
   CSS Variables
   =========================================== */
:root {
    /* Brand Colors */
    --primary: #FF8C00;
    --primary-light: #FFA500;
    --primary-dark: #E07000;
    --primary-gradient: linear-gradient(135deg, #FF8C00, #FFD700);
    
    /* Background */
    --bg-primary: #F5F7FA;
    --bg-secondary: #FFFFFF;
    --bg-tertiary: #E8ECF1;
    
    /* Text */
    --text-primary: #1A1A2E;
    --text-secondary: #4A4A5A;
    --text-muted: #8A8A9A;
    --text-inverse: #FFFFFF;
    
    /* Status */
    --success: #10B981;
    --warning: #F59E0B;
    --error: #EF4444;
    --info: #3B82F6;
    
    /* Borders */
    --border-color: #D1D5DB;
    --border-color-light: #E5E7EB;
    --border-radius: 12px;
    --border-radius-lg: 16px;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 8px rgba(0,0,0,0.12), 0 2px 4px rgba(0,0,0,0.08);
    --shadow-lg: 0 10px 30px rgba(0,0,0,0.15), 0 4px 8px rgba(0,0,0,0.1);
    --shadow-glow: 0 0 24px rgba(255,140,0,0.4), 0 4px 12px rgba(255,140,0,0.2);
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    
    /* Layout */
    --sidebar-width: 240px;
    --mobile-nav-height: 70px;
    --header-height: 60px;
    
    /* Transitions */
    --transition: 0.2s ease;
}

/* Dark Theme */
[data-theme="dark"] {
    --bg-primary: #0F0F1A;
    --bg-secondary: #1A1A2E;
    --bg-tertiary: #252540;
    --text-primary: #FAFAFA;
    --text-secondary: #CACAD0;
    --text-muted: #8A8A9A;
    --border-color: #2A2A40;
}

/* ===========================================
   Reset & Base
   =========================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
    min-height: 100vh;
    overflow-x: hidden;
}

a {
    color: var(--primary);
    text-decoration: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

input, select {
    font-family: inherit;
    font-size: 1rem;
}

img {
    max-width: 100%;
    height: auto;
}

/* ===========================================
   Loading Screen
   =========================================== */
.loading-screen {
    position: fixed;
    inset: 0;
    background: var(--bg-primary);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.3s ease;
}

.loading-screen.hidden {
    opacity: 0;
    pointer-events: none;
}

.loading-logo {
    width: 80px;
    height: 80px;
    margin-bottom: var(--spacing-lg);
    animation: pulse 2s infinite;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

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

/* ===========================================
   App Layout
   =========================================== */
.app-container {
    display: flex;
    min-height: 100vh;
}

/* ===========================================
   Sidebar (Desktop)
   =========================================== */
.sidebar {
    display: none;
    position: fixed;
    left: 0;
    top: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    flex-direction: column;
    padding: var(--spacing-lg);
    z-index: 100;
}

@media (min-width: 768px) {
    .sidebar {
        display: flex;
    }
}

.sidebar-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
}

.sidebar-logo {
    width: 40px;
    height: 40px;
}

.sidebar-title {
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    flex: 1;
}

.sidebar-footer {
    margin-top: auto;
}

/* ===========================================
   Navigation Buttons
   =========================================== */
.nav-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    color: var(--text-secondary);
    transition: all var(--transition);
    width: 100%;
    text-align: left;
}

.nav-btn svg,
.nav-btn .nav-icon {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
    border-radius: 50%;
}

.nav-btn.active .nav-icon {
    filter: brightness(1.2);
}

.nav-btn:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.nav-btn.active {
    background: var(--primary-gradient);
    color: var(--text-inverse);
    box-shadow: var(--shadow-glow);
}

/* ===========================================
   Balance Card
   =========================================== */
.balance-card {
    background: var(--bg-tertiary);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
}

.balance-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.balance-value {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.coin-icon {
    font-size: 1.25em;
}

/* ===========================================
   Main Content
   =========================================== */
.main-content {
    flex: 1;
    padding: var(--spacing-md);
    padding-bottom: calc(var(--mobile-nav-height) + var(--spacing-md));
    max-width: 100%;
}

@media (min-width: 768px) {
    .main-content {
        margin-left: var(--sidebar-width);
        padding: var(--spacing-xl);
        padding-bottom: var(--spacing-xl);
    }
}

@media (min-width: 1200px) {
    .main-content {
        max-width: 1200px;
        margin-left: calc(var(--sidebar-width) + (100% - var(--sidebar-width) - 1200px) / 2);
    }
}

/* ===========================================
   Screens
   =========================================== */
.screen {
    display: none;
    animation: fadeIn 0.3s ease;
}

.screen.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.screen-header {
    margin-bottom: var(--spacing-xl);
}

.screen-header h1 {
    font-size: 1.75rem;
    font-weight: 700;
}

/* ===========================================
   Auth Screen
   =========================================== */
.auth-container {
    max-width: 400px;
    margin: 0 auto;
    padding-top: var(--spacing-xl);
}

.auth-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.auth-logo {
    width: 80px;
    height: 80px;
    margin-bottom: var(--spacing-md);
}

.auth-title {
    font-size: 2rem;
    font-weight: 800;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.auth-subtitle {
    color: var(--text-muted);
    margin-top: var(--spacing-xs);
}

.auth-form {
    background: var(--bg-secondary);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
}

.auth-form h2 {
    margin-bottom: var(--spacing-lg);
    font-size: 1.5rem;
}

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

.auth-switch {
    text-align: center;
    margin-top: var(--spacing-lg);
    color: var(--text-muted);
}

/* ===========================================
   Form Elements
   =========================================== */
.form-group {
    margin-bottom: var(--spacing-md);
}

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

.form-group input,
.form-group select {
    width: 100%;
    padding: var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: border-color var(--transition);
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
}

.form-group input::placeholder {
    color: var(--text-muted);
}

/* ===========================================
   Buttons
   =========================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--border-radius);
    font-weight: 600;
    transition: all var(--transition);
}

.btn-primary {
    background: var(--primary-gradient);
    color: var(--text-inverse);
    box-shadow: var(--shadow-sm);
}

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

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

.btn-secondary:hover {
    background: var(--border-color);
}

.btn-danger {
    background: var(--error);
    color: var(--text-inverse);
}

.btn-block {
    width: 100%;
}

.btn-icon {
    padding: var(--spacing-sm);
    background: var(--bg-tertiary);
    border-radius: var(--border-radius);
}

/* ===========================================
   Section
   =========================================== */
.section {
    margin-bottom: var(--spacing-xl);
}

.section h2 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-md);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

/* ===========================================
   Games Grid
   =========================================== */
.games-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.game-card {
    background: var(--bg-secondary);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color-light);
    cursor: pointer;
    transition: all var(--transition);
}

.game-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.game-card.locked {
    opacity: 0.6;
    cursor: not-allowed;
}

.game-card.locked:hover {
    transform: none;
}

.game-cover {
    width: 100%;
    height: 160px;
    object-fit: cover;
}

.game-cover.placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    font-size: 3rem;
}

.game-info {
    padding: var(--spacing-md);
}

.game-info h3 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-xs);
}

.game-info p {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-sm);
}

.game-meta {
    display: flex;
    gap: var(--spacing-md);
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* ===========================================
   Missions List
   =========================================== */
.missions-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.mission-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color-light);
}

.mission-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border-radius: var(--border-radius);
    font-size: 1.5rem;
}

.mission-icon-img {
    width: 32px;
    height: 32px;
    object-fit: contain;
}

.mission-info {
    flex: 1;
}

.mission-info h4 {
    font-size: 0.875rem;
    margin-bottom: var(--spacing-xs);
}

.mission-info p {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.mission-progress {
    width: 100%;
    height: 4px;
    background: var(--bg-tertiary);
    border-radius: 2px;
    margin-top: var(--spacing-xs);
    overflow: hidden;
}

.mission-progress-bar {
    height: 100%;
    background: var(--primary-gradient);
    border-radius: 2px;
    transition: width 0.3s ease;
}

.mission-reward {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-weight: 600;
    color: var(--primary);
}

/* ===========================================
   Wallet
   =========================================== */
.wallet-balance-card {
    background: var(--primary-gradient);
    color: var(--text-inverse);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.wallet-balance-card .balance-label {
    color: rgba(255,255,255,0.8);
}

.wallet-balance-card .balance-amount {
    font-size: 2.5rem;
    font-weight: 800;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin: var(--spacing-sm) 0;
}

.wallet-balance-card .balance-usd {
    color: rgba(255,255,255,0.7);
}

.wallet-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.transaction-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.transaction-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
}

.transaction-info h4 {
    font-size: 0.875rem;
}

.transaction-info p {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.transaction-amount {
    font-weight: 600;
}

.transaction-amount.positive {
    color: var(--success);
}

.transaction-amount.negative {
    color: var(--error);
}

/* ===========================================
   Profile
   =========================================== */
.profile-card {
    background: var(--bg-secondary);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.profile-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.profile-avatar {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    overflow: hidden;
    border: 3px solid var(--primary);
}

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

.profile-info h2 {
    font-size: 1.25rem;
}

.profile-info p {
    color: var(--text-muted);
}

.profile-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    text-align: center;
}

.stat-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.referral-code {
    display: flex;
    gap: var(--spacing-sm);
}

.referral-code input {
    flex: 1;
    padding: var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background: var(--bg-primary);
    font-family: monospace;
}

.setting-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--border-color);
}

.setting-row select {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background: var(--bg-primary);
}

/* ===========================================
   Mobile Navigation
   =========================================== */
.mobile-nav {
    display: flex;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: var(--mobile-nav-height);
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    z-index: 100;
}

@media (min-width: 768px) {
    .mobile-nav {
        display: none;
    }
}

.mobile-nav .nav-btn {
    flex: 1;
    flex-direction: column;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm);
    border-radius: 0;
    font-size: 0.625rem;
}

.mobile-nav .nav-btn svg {
    width: 24px;
    height: 24px;
}

.mobile-nav .nav-btn.active {
    background: transparent;
    color: var(--primary);
    box-shadow: none;
}

/* ===========================================
   Modal
   =========================================== */
.modal {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
    z-index: 200;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--bg-secondary);
    border-radius: var(--border-radius-lg);
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    animation: slideUp 0.3s ease;
}

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

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    font-size: 1.25rem;
}

.modal-close {
    font-size: 1.5rem;
    color: var(--text-muted);
    padding: var(--spacing-xs);
}

.modal-body {
    padding: var(--spacing-lg);
}

/* ===========================================
   Mode Cards
   =========================================== */
.mode-card {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-primary);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-md);
    cursor: pointer;
    transition: all var(--transition);
}

.mode-card:hover {
    background: var(--bg-tertiary);
    transform: translateX(4px);
}

.mode-image {
    width: 80px;
    height: 80px;
    border-radius: var(--border-radius);
    object-fit: cover;
}

.mode-info h4 {
    font-size: 1rem;
    margin-bottom: var(--spacing-xs);
}

.mode-info p {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-sm);
}

.mode-price {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--primary-gradient);
    color: var(--text-inverse);
    border-radius: var(--border-radius);
    font-size: 0.75rem;
    font-weight: 600;
}

.mode-price.free {
    background: var(--success);
}

/* ===========================================
   Toast
   =========================================== */
#toast-container {
    position: fixed;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    z-index: 300;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.toast {
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    animation: slideIn 0.3s ease;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

@keyframes slideIn {
    from { opacity: 0; transform: translateX(100%); }
    to { opacity: 1; transform: translateX(0); }
}

.toast.success {
    border-left: 4px solid var(--success);
}

.toast.error {
    border-left: 4px solid var(--error);
}

.toast.info {
    border-left: 4px solid var(--info);
}

/* ===========================================
   Utilities
   =========================================== */
.hidden {
    display: none !important;
}

.text-muted {
    color: var(--text-muted);
}

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

.mt-md {
    margin-top: var(--spacing-md);
}

.mb-md {
    margin-bottom: var(--spacing-md);
}

/* ===========================================
   Coin Animations
   =========================================== */
@keyframes floatToCoin {
    0% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 1;
    }
    50% {
        transform: translate(-50%, -200%) scale(1.2);
        opacity: 0.8;
    }
    100% {
        transform: translate(-50%, -300%) scale(0.5);
        opacity: 0;
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.2);
        color: var(--primary);
    }
}

.floating-coin {
    animation: floatToCoin 1s ease-out forwards;
}

/* Mission Item States */
.mission-item {
    transition: all 0.3s ease;
}

.mission-item.completed {
    border-color: var(--success);
    background: rgba(16, 185, 129, 0.05);
}

.mission-item.claimed {
    opacity: 0.6;
}

.mission-action {
    margin-top: var(--spacing-sm);
}

.mission-reward {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: var(--spacing-sm);
}

.reward-amount {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.btn-sm {
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: 0.875rem;
}

.mission-progress-text {
    font-size: 0.875rem;
    color: var(--text-muted);
}