/* ========================================
   LottoPredictor 4D - Main Styles
   ======================================== */

/* CSS Variables */
:root {
    /* 4D Holographic Effects */
    --primary-4d: linear-gradient(135deg, #00cec9, #6c5ce7);
    --neon-effect: 0 0 15px rgba(0,206,201,0.5);
    --holographic-bg: url('data:image/svg+xml,<svg viewBox="0 0 100 100" xmlns="http://www.w3.org/2000/svg"><path d="M0 50L50 0L100 50L50 100Z" fill="%2300cec9"/></svg>');
    
    /* Colors */
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --primary-light: rgba(99, 102, 241, 0.1);
    --secondary: #a855f7;
    --accent: #f59e0b;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    
    /* Backgrounds */
    --bg-primary: #0f0f14;
    --bg-secondary: #1a1a24;
    --bg-tertiary: #252532;
    --bg-card: #1e1e2a;
    --bg-hover: #2a2a3a;
    
    /* Text */
    --text-primary: #ffffff;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;
    
    /* Borders */
    --border-color: #2e2e3e;
    --border-light: #3e3e4e;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);
    --gradient-gold: linear-gradient(135deg, #f59e0b 0%, #fbbf24 50%, #f59e0b 100%);
    --gradient-holographic: linear-gradient(135deg, 
        #ff6b6b 0%, 
        #feca57 17%, 
        #48dbfb 33%, 
        #ff9ff3 50%, 
        #54a0ff 67%, 
        #5f27cd 83%, 
        #ff6b6b 100%);
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.3);
    --shadow-gold: 0 0 30px rgba(245, 158, 11, 0.4);
    
    /* Sizing */
    --header-height: 64px;
    --sidebar-width: 260px;
    --border-radius: 12px;
    --border-radius-lg: 16px;
    --border-radius-xl: 24px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 400ms ease;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

/* ========================================
   Header
   ======================================== */
.app-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: rgba(15, 15, 20, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    z-index: 1000;
}

.app-logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.app-logo-icon {
    width: 40px;
    height: 40px;
}

.app-logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.user-menu {
    display: flex;
    align-items: center;
    gap: 16px;
}

/* Language Selector */
.language-selector {
    position: relative;
}

.language-button {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition-fast);
}

.language-button:hover {
    background: var(--bg-hover);
    border-color: var(--border-light);
}

.language-flag {
    font-size: 1.25rem;
}

.chevron-icon {
    transition: transform var(--transition-fast);
}

.language-selector.open .chevron-icon {
    transform: rotate(180deg);
}

.language-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 180px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: var(--transition-fast);
    z-index: 100;
}

.language-selector.open .language-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.language-option {
    display: flex;
    align-items: center;
    gap: 8px;
    width: 100%;
    padding: 10px 16px;
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition-fast);
    text-align: left;
}

.language-option:hover,
.language-option.active {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.language-option:first-child {
    border-radius: var(--border-radius) var(--border-radius) 0 0;
}

.language-option:last-child {
    border-radius: 0 0 var(--border-radius) var(--border-radius);
}

/* Theme Toggle */
.theme-toggle {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition-fast);
}

.theme-toggle:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.theme-toggle .moon-icon {
    display: none;
}

body.light-theme .theme-toggle .sun-icon {
    display: none;
}

body.light-theme .theme-toggle .moon-icon {
    display: block;
}

/* User Button */
.user-button {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: var(--gradient-primary);
    border: none;
    border-radius: var(--border-radius);
    color: white;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-fast);
}

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

/* ========================================
   Main Layout
   ======================================== */
.main-container {
    display: flex;
    min-height: 100vh;
    padding-top: var(--header-height);
}

/* Sidebar */
.sidebar {
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: var(--sidebar-width);
    height: calc(100vh - var(--header-height));
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    padding: 24px 16px;
    overflow-y: auto;
}

.main-nav {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: none;
    border: none;
    border-radius: var(--border-radius);
    color: var(--text-secondary);
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--transition-fast);
    text-align: left;
}

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

.nav-item.active {
    background: var(--primary-light);
    color: var(--primary);
}

.nav-item svg {
    flex-shrink: 0;
}

/* Premium Banner */
.premium-banner {
    margin-top: auto;
    padding: 20px;
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.15) 0%, rgba(168, 85, 247, 0.15) 100%);
    border: 1px solid rgba(245, 158, 11, 0.3);
    border-radius: var(--border-radius-lg);
    text-align: center;
}

.premium-icon {
    font-size: 2rem;
    margin-bottom: 8px;
}

.premium-banner h3 {
    font-size: 1.1rem;
    color: var(--accent);
    margin-bottom: 4px;
}

.premium-banner p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.premium-features-mini {
    list-style: none;
    text-align: left;
    margin-bottom: 16px;
}

.premium-features-mini li {
    font-size: 0.8rem;
    color: var(--text-secondary);
    padding: 4px 0;
}

.premium-button {
    width: 100%;
    padding: 12px;
    background: var(--gradient-gold);
    border: none;
    border-radius: var(--border-radius);
    color: #1a1a24;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
}

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

/* Content Area */
.content-area {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: 32px;
    max-width: calc(100% - var(--sidebar-width));
}

.section-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 20px;
}

/* ========================================
   Lottery Selector
   ======================================== */
.lottery-selector {
    margin-bottom: 32px;
}

.lottery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 16px;
}

.lottery-card {
    position: relative;
    padding: 20px;
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    cursor: pointer;
    transition: var(--transition-normal);
    text-align: center;
}

.lottery-card:hover {
    border-color: #00cec9;
    transform: translateY(-4px);
    box-shadow: 0 0 20px rgba(0, 206, 201, 0.3);
}

.lottery-card.active {
    border-color: #00cec9;
    background: linear-gradient(135deg, rgba(0, 206, 201, 0.1), rgba(108, 92, 231, 0.1));
    box-shadow: 
        0 0 20px rgba(0, 206, 201, 0.3),
        inset 0 0 30px rgba(108, 92, 231, 0.1);
}

.lottery-card .flag {
    font-size: 2rem;
    margin-bottom: 8px;
}

.lottery-card .name {
    font-weight: 600;
    margin-bottom: 4px;
}

.lottery-card .format {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ========================================
   Generator Section
   ======================================== */
.generator-section {
    margin-bottom: 32px;
}

.generator-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
}

.generator-info {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
}

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

.lottery-format {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* 3D Button Container */
.button-3d-container {
    display: flex;
    justify-content: center;
    perspective: 1000px;
    margin-bottom: 24px;
}

.button-4d {
    position: relative;
    padding: 20px 48px;
    background: var(--primary-4d);
    border: 2px solid #00cec9;
    border-radius: var(--border-radius-xl);
    color: white;
    font-size: 1.25rem;
    font-weight: 600;
    cursor: pointer;
    transform-style: preserve-3d;
    transition: var(--transition-normal);
    overflow: hidden;
    box-shadow: var(--neon-effect);
    animation: hologram 5s infinite;
}

@keyframes hologram {
    0% { filter: hue-rotate(0deg); }
    50% { filter: hue-rotate(180deg); }
    100% { filter: hue-rotate(360deg); }
}

.button-4d:hover {
    transform: translateY(-4px) rotateX(5deg);
    box-shadow: 
        0 10px 30px rgba(0, 206, 201, 0.4),
        0 0 60px rgba(108, 92, 231, 0.3),
        var(--neon-effect);
}

.button-4d:active {
    transform: translateY(-2px) rotateX(2deg);
    animation-play-state: paused;
}

.button-4d.generating {
    animation: hologram 0.5s infinite, pulse-glow 0.5s infinite alternate;
}

@keyframes pulse-glow {
    from {
        box-shadow: 0 0 20px rgba(0, 206, 201, 0.5);
    }
    to {
        box-shadow: 0 0 40px rgba(108, 92, 231, 0.8);
    }
}

.holographic-effect {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    background: var(--holographic-bg);
    background-size: 20px 20px;
    opacity: 0.3;
    mix-blend-mode: overlay;
    animation: holographic-shift 3s ease infinite;
    pointer-events: none;
}

@keyframes holographic-shift {
    0%, 100% { 
        background-position: 0% 50%;
        opacity: 0.2;
    }
    50% { 
        background-position: 100% 50%;
        opacity: 0.4;
    }
}

.button-text {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    gap: 12px;
}

/* Customization Panel */
.customization-panel {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
    padding: 24px;
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-color);
}

.color-themes h4,
.dimension-controls h4 {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.theme-buttons {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.theme-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 2px solid var(--border-color);
    cursor: pointer;
    transition: var(--transition-fast);
}

.theme-btn:hover {
    transform: scale(1.1);
}

.theme-btn.active {
    border-color: var(--text-primary);
    box-shadow: 0 0 10px rgba(255, 255, 255, 0.3);
}

.dimension-buttons,
.count-buttons,
.mode-buttons {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 16px;
}

.dim-btn {
    padding: 8px 20px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    color: var(--text-secondary);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-fast);
}

.dim-btn:hover {
    background: var(--bg-hover);
}

.dim-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}

.ticket-count-section,
.mode-section {
    margin-top: 16px;
}

.panel-section h4 {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.ticket-count-selector,
.mode-selector {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.count-btn,
.mode-btn {
    padding: 8px 16px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    color: var(--text-secondary);
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 6px;
}

.count-btn:hover,
.mode-btn:hover {
    background: var(--bg-hover);
    border-color: var(--border-light);
}

.count-btn.active,
.mode-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}

.count-btn.premium-only,
.mode-btn.premium-only {
    opacity: 0.7;
    position: relative;
}

.count-btn.premium-only:hover,
.mode-btn.premium-only:hover {
    background: rgba(245, 158, 11, 0.1);
    border-color: var(--accent);
}

/* ========================================
   Results Section
   ======================================== */
.results-section {
    margin-bottom: 32px;
}

.results-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

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

.action-btn {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition-fast);
}

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

.action-btn.active {
    color: var(--danger);
}

/* Numbers Display */
.lotto-numbers-display {
    min-height: 200px;
    padding: 32px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.empty-state {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    text-align: center;
}

.empty-state svg {
    margin-bottom: 16px;
    opacity: 0.3;
}

/* Number Ticket */
.number-ticket {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 20px;
    background: var(--bg-tertiary);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

.ticket-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    min-width: 60px;
}

.number-balls {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.number-ball {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-4d);
    border-radius: 50%;
    font-size: 1.25rem;
    font-weight: 700;
    color: white;
    box-shadow: 
        0 4px 15px rgba(0, 206, 201, 0.4),
        0 0 20px rgba(108, 92, 231, 0.3),
        inset 0 2px 4px rgba(255, 255, 255, 0.3);
    animation: ball-appear 0.5s ease backwards, ball-glow 2s ease-in-out infinite alternate;
    border: 2px solid rgba(0, 206, 201, 0.5);
}

@keyframes ball-glow {
    from {
        box-shadow: 
            0 4px 15px rgba(0, 206, 201, 0.4),
            0 0 20px rgba(108, 92, 231, 0.3),
            inset 0 2px 4px rgba(255, 255, 255, 0.3);
    }
    to {
        box-shadow: 
            0 4px 25px rgba(0, 206, 201, 0.6),
            0 0 35px rgba(108, 92, 231, 0.5),
            inset 0 2px 4px rgba(255, 255, 255, 0.4);
    }
}

.number-ball.bonus {
    background: var(--gradient-gold);
    border-color: rgba(245, 158, 11, 0.5);
    box-shadow: 
        0 4px 15px rgba(245, 158, 11, 0.4),
        0 0 20px rgba(251, 191, 36, 0.3),
        inset 0 2px 4px rgba(255, 255, 255, 0.3);
    animation: ball-appear 0.5s ease backwards, gold-glow 2s ease-in-out infinite alternate;
}

@keyframes gold-glow {
    from {
        box-shadow: 
            0 4px 15px rgba(245, 158, 11, 0.4),
            0 0 20px rgba(251, 191, 36, 0.3),
            inset 0 2px 4px rgba(255, 255, 255, 0.3);
    }
    to {
        box-shadow: 
            0 4px 25px rgba(245, 158, 11, 0.6),
            0 0 35px rgba(251, 191, 36, 0.5),
            inset 0 2px 4px rgba(255, 255, 255, 0.4);
    }
}

.number-ball:nth-child(1) { animation-delay: 0.1s; }
.number-ball:nth-child(2) { animation-delay: 0.2s; }
.number-ball:nth-child(3) { animation-delay: 0.3s; }
.number-ball:nth-child(4) { animation-delay: 0.4s; }
.number-ball:nth-child(5) { animation-delay: 0.5s; }
.number-ball:nth-child(6) { animation-delay: 0.6s; }
.number-ball:nth-child(7) { animation-delay: 0.7s; }

@keyframes ball-appear {
    from {
        opacity: 0;
        transform: scale(0) rotate(-180deg);
    }
    to {
        opacity: 1;
        transform: scale(1) rotate(0deg);
    }
}

/* AI Analysis */
.ai-analysis {
    margin-top: 24px;
    padding: 20px;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(168, 85, 247, 0.1) 100%);
    border: 1px solid rgba(99, 102, 241, 0.3);
    border-radius: var(--border-radius-lg);
    display: none;
}

.ai-analysis.visible {
    display: block;
}

.premium-badge-small {
    padding: 2px 8px;
    background: var(--gradient-gold);
    border-radius: 12px;
    font-size: 0.65rem;
    font-weight: 700;
    color: #1a1a24;
}

/* Language flag styles */
.language-flag {
    font-size: 1.25rem;
    width: 20px;
    height: 14px;
    object-fit: cover;
    border-radius: 2px;
}

.ai-analysis-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.ai-analysis-header svg {
    color: var(--primary);
}

.ai-analysis-header h4 {
    font-weight: 600;
}

.ai-analysis-header .premium-badge {
    padding: 4px 8px;
    background: var(--gradient-gold);
    border-radius: 20px;
    font-size: 0.7rem;
    font-weight: 600;
    color: #1a1a24;
}

.ai-insights {
    display: grid;
    gap: 12px;
}

.insight-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 12px;
    background: var(--bg-tertiary);
    border-radius: var(--border-radius);
}

.insight-icon {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-light);
    border-radius: 8px;
    color: var(--primary);
    flex-shrink: 0;
}

.insight-content h5 {
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 4px;
}

.insight-content p {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* ========================================
   Recent Results
   ======================================== */
.recent-results-section {
    margin-bottom: 32px;
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.view-all-btn {
    padding: 8px 16px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    color: var(--text-secondary);
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition-fast);
}

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

.recent-results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 16px;
}

.result-card {
    padding: 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    transition: var(--transition-fast);
}

.result-card:hover {
    border-color: var(--border-light);
    transform: translateY(-2px);
}

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

.result-lottery {
    display: flex;
    align-items: center;
    gap: 8px;
}

.result-lottery .flag {
    font-size: 1.25rem;
}

.result-lottery .name {
    font-weight: 500;
}

.result-date {
    font-size: 0.8rem;
    color: var(--text-muted);
    padding: 4px 10px;
    background: var(--bg-tertiary);
    border-radius: 20px;
}

.result-numbers {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    margin-bottom: 12px;
}

.result-ball {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: 50%;
    font-size: 0.9rem;
    font-weight: 600;
    color: white;
}

.result-ball.bonus {
    background: var(--gradient-gold);
}

.result-jackpot {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 12px;
    border-top: 1px solid var(--border-color);
}

.jackpot-label {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.jackpot-amount {
    font-weight: 600;
    color: var(--success);
}

/* ========================================
   Modals
   ======================================== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-normal);
    z-index: 2000;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.premium-modal,
.auth-modal {
    position: relative;
    width: 90%;
    max-width: 700px;
    max-height: 90vh;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-xl);
    overflow: hidden;
    transform: scale(0.9) translateY(20px);
    transition: var(--transition-normal);
}

.modal-overlay.active .premium-modal,
.modal-overlay.active .auth-modal {
    transform: scale(1) translateY(0);
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border: none;
    border-radius: 50%;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    transition: var(--transition-fast);
    z-index: 10;
}

.modal-close:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

/* Premium Modal */
.modal-header {
    padding: 40px 40px 24px;
    text-align: center;
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.1) 0%, rgba(168, 85, 247, 0.1) 100%);
}

.premium-badge {
    font-size: 3rem;
    margin-bottom: 16px;
}

.modal-header h2 {
    font-size: 1.75rem;
    margin-bottom: 8px;
}

.modal-header p {
    color: var(--text-secondary);
}

.modal-body {
    padding: 32px 40px 40px;
}

.pricing-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.pricing-card {
    position: relative;
    padding: 24px;
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    text-align: center;
}

.pricing-card.featured {
    border-color: var(--accent);
}

.best-value {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    padding: 4px 16px;
    background: var(--gradient-gold);
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    color: #1a1a24;
}

.pricing-card h3 {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.pricing-card .price {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.pricing-card .price span {
    font-size: 1rem;
    font-weight: 400;
    color: var(--text-muted);
}

.pricing-card .savings {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(16, 185, 129, 0.2);
    border-radius: 20px;
    font-size: 0.8rem;
    color: var(--success);
    margin-bottom: 16px;
}

.pricing-card ul {
    list-style: none;
    text-align: left;
    margin-bottom: 24px;
}

.pricing-card li {
    padding: 8px 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.buy-btn {
    width: 100%;
    padding: 14px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    color: var(--text-primary);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-fast);
}

.buy-btn:hover {
    background: var(--bg-hover);
}

.buy-btn.featured {
    background: var(--gradient-gold);
    border: none;
    color: #1a1a24;
}

.buy-btn.featured:hover {
    box-shadow: var(--shadow-gold);
}

/* Auth Modal */
.auth-modal {
    max-width: 420px;
}

.auth-tabs {
    display: flex;
    border-bottom: 1px solid var(--border-color);
}

.auth-tab {
    flex: 1;
    padding: 16px;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-fast);
    position: relative;
}

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

.auth-tab.active {
    color: var(--primary);
}

.auth-tab.active::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--primary);
}

.auth-content {
    padding: 32px;
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

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

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-group input {
    padding: 12px 16px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    color: var(--text-primary);
    font-size: 1rem;
    transition: var(--transition-fast);
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

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

.auth-submit {
    padding: 14px;
    background: var(--gradient-primary);
    border: none;
    border-radius: var(--border-radius);
    color: white;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
}

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

/* ========================================
   Toast Notifications
   ======================================== */
.toast-container {
    position: fixed;
    bottom: 24px;
    right: 24px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    z-index: 3000;
}

.toast {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    animation: toast-in 0.3s ease;
}

.toast.success {
    border-color: var(--success);
}

.toast.error {
    border-color: var(--danger);
}

.toast.warning {
    border-color: var(--warning);
}

.toast-icon {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
}

.toast.success .toast-icon {
    color: var(--success);
}

.toast.error .toast-icon {
    color: var(--danger);
}

.toast.warning .toast-icon {
    color: var(--warning);
}

.toast-message {
    font-size: 0.9rem;
}

.toast-close {
    padding: 4px;
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    transition: var(--transition-fast);
}

.toast-close:hover {
    color: var(--text-primary);
}

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

.toast.removing {
    animation: toast-out 0.3s ease forwards;
}

@keyframes toast-out {
    to {
        opacity: 0;
        transform: translateX(100%);
    }
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 1024px) {
    .sidebar {
        width: 80px;
        padding: 16px 8px;
    }
    
    .nav-item span,
    .premium-banner h3,
    .premium-banner p,
    .premium-features-mini,
    .premium-button {
        display: none;
    }
    
    .premium-banner {
        padding: 12px;
    }
    
    .nav-item {
        justify-content: center;
        padding: 12px;
    }
    
    .content-area {
        margin-left: 80px;
        max-width: calc(100% - 80px);
    }
}

@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        top: auto;
        width: 100%;
        height: auto;
        flex-direction: row;
        border-right: none;
        border-top: 1px solid var(--border-color);
        z-index: 100;
    }
    
    .main-nav {
        flex-direction: row;
        justify-content: space-around;
        width: 100%;
    }
    
    .premium-banner {
        display: none;
    }
    
    .content-area {
        margin-left: 0;
        max-width: 100%;
        padding: 24px 16px 100px;
    }
    
    .app-logo-text {
        display: none;
    }
    
    .language-text {
        display: none;
    }
    
    .pricing-cards {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .lottery-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .number-ball {
        width: 40px;
        height: 40px;
        font-size: 1.1rem;
    }
    
    .button-4d {
        padding: 16px 32px;
        font-size: 1rem;
    }
}

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

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}