:root {
    --primary-blue: #3b82f6;
    --secondary-blue: #60a5fa;
    --accent-purple: #8b5cf6;
    --dark-blue: #1e40af;
    --light-purple: #a855f7;
    --dark-bg: #0f172a;
    --panel-bg: #1e293b;
    --card-blue: #2563eb;
    --card-purple: #7c3aed;
    --neon-blue: 0 0 8px #3b82f6, 0 0 16px #3b82f6;
    --neon-purple: 0 0 8px #8b5cf6, 0 0 16px #8b5cf6;
    --text-glow: 0 0 3px rgba(255, 255, 255, 0.9);
    --success-color: #10b981;
    --error-color: #ef4444;
    --text-light: #f8fafc;
    --text-bright: #ffffff;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background: linear-gradient(135deg, var(--dark-bg) 0%, #1e1b4b 50%, var(--dark-bg) 100%);
    color: var(--text-light);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 20px;
    overflow-x: hidden;
    position: relative;
}

.cyber-grid {
    position: fixed;
    top: -10;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        linear-gradient(90deg, transparent 95%, rgba(59, 130, 246, 0.1) 95%),
        linear-gradient(0deg, transparent 95%, rgba(139, 92, 246, 0.1) 95%);
    background-size: 50px 50px;
    pointer-events: none;
    z-index: -1;
}

.container {
    width: 100%;
    max-width: 1200px;
    text-align: center;
    position: relative;
    z-index: 1;
    margin: 20px auto 0 auto; /* Added 40px top margin to push content down */
}
/* Return to App Button */
/* Return to App Button */
.return-btn {
    position: absolute;
    top: 10px; /* Changed from 20px to 10px to position it higher */
    right: 20px;
    background: linear-gradient(135deg, var(--primary-blue), #1e40af) !important; /* Changed to blue tint */
    padding: 12px 24px !important; /* Slightly larger padding */
    font-size: 0.9rem !important;
    z-index: 1000;
    border: 2px solid var(--secondary-blue) !important; /* Added blue border */
    box-shadow: 
        0 4px 15px rgba(59, 130, 246, 0.6),
        0 0 10px rgba(59, 130, 246, 0.4) !important; /* Enhanced blue glow */
}

.return-btn:hover {
    background: linear-gradient(135deg, #1e40af, var(--primary-blue)) !important;
    transform: translateY(-2px);
    box-shadow: 
        0 6px 20px rgba(59, 130, 246, 0.8),
        0 0 15px rgba(59, 130, 246, 0.6) !important;
}
.cyber-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    margin-bottom: 2rem;
    color: var(--text-bright);
    text-shadow: 
        0 0 10px var(--primary-blue),
        0 0 20px var(--primary-blue),
        0 0 30px var(--accent-purple),
        0 0 40px var(--accent-purple);
    font-weight: bold;
    letter-spacing: 3px;
    position: relative;
    padding: 15px 30px;
    background: rgba(30, 41, 59, 0.8);
    border-radius: 20px;
    border: 3px solid var(--primary-blue);
    backdrop-filter: blur(10px);
    word-wrap: break-word;
}

.cyber-title::before {
    content: '';
    position: absolute;
    top: -3px;
    left: -3px;
    right: -3px;
    bottom: -3px;
    background: linear-gradient(45deg, var(--primary-blue), var(--accent-purple), var(--light-purple), var(--primary-blue));
    border-radius: 23px;
    z-index: -1;
    animation: titleGlow 2s ease-in-out infinite alternate;
}

@keyframes titleGlow {
    0% { opacity: 0.7; }
    100% { opacity: 1; }
}

.subtitle {
    font-size: clamp(1rem, 3vw, 1.3rem);
    margin-bottom: 20px;
    line-height: 1.5;
    color: var(--secondary-blue);
    font-weight: 500;
}

.white-text {
    color: var(--text-bright) !important;
}

.domain-info {
    font-size: clamp(1rem, 2.5vw, 1.1rem);
    margin-bottom: 15px;
    color: var(--accent-purple);
    font-weight: 600;
}

.domains {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.domain {
    background: rgba(59, 130, 246, 0.15);
    padding: 12px 20px;
    border-radius: 10px;
    border: 1px solid var(--primary-blue);
    font-weight: 600;
    color: var(--text-bright);
    backdrop-filter: blur(10px);
    font-size: clamp(0.9rem, 2vw, 1rem);
}

/* Game Features */
.game-features {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin: 30px 0;
    flex-wrap: wrap;
}

.feature {
    display: flex;
    align-items: center;
    gap: 10px;
    background: rgba(139, 92, 246, 0.2);
    padding: 12px 20px;
    border-radius: 10px;
    border: 1px solid var(--accent-purple);
    backdrop-filter: blur(10px);
}

.feature-icon {
    font-size: 1.5rem;
}

.feature-text {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-bright);
}

.screen {
    display: none;
    width: 100%;
    padding: 20px 15px;
    background: var(--panel-bg);
    border-radius: 15px;
    border: 2px solid var(--primary-blue);
    box-shadow: 
        0 0 25px rgba(59, 130, 246, 0.3),
        inset 0 0 25px rgba(59, 130, 246, 0.1);
    backdrop-filter: blur(10px);
    animation: cyberFadeIn 0.5s ease;
    position: relative;
    overflow: hidden;
    margin-bottom: 20px;
}

.screen::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(45deg, var(--primary-blue), var(--accent-purple), var(--light-purple), var(--primary-blue));
    background-size: 400% 400%;
    border-radius: 17px;
    z-index: -1;
    animation: borderGlow 3s ease infinite;
    opacity: 0.7;
}

@keyframes borderGlow {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

@keyframes cyberFadeIn {
    from { 
        opacity: 0; 
        transform: translateY(20px) scale(0.95);
    }
    to { 
        opacity: 1; 
        transform: translateY(0) scale(1);
    }
}

.active {
    display: block;
}

.cyber-btn {
    background: linear-gradient(135deg, var(--primary-blue), var(--accent-purple));
    color: white;
    border: none;
    padding: 15px 30px;
    margin: 15px;
    border-radius: 8px;
    font-size: clamp(1rem, 2.5vw, 1.2rem);
    font-weight: bold;
    cursor: pointer;
    box-shadow: 
        0 4px 15px rgba(59, 130, 246, 0.4),
        0 0 10px rgba(139, 92, 246, 0.3);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    text-transform: uppercase;
    letter-spacing: 1px;
    width: auto;
    min-width: 150px;
}

.cyber-btn:hover {
    transform: translateY(-3px);
    box-shadow: 
        0 6px 20px rgba(59, 130, 246, 0.6),
        0 0 15px rgba(139, 92, 246, 0.4);
    background: linear-gradient(135deg, var(--accent-purple), var(--primary-blue));
}

.cyber-btn:active {
    transform: translateY(1px);
}

.cyber-btn.small-btn {
    padding: 10px 20px;
    font-size: clamp(0.8rem, 2vw, 1rem);
    margin: 5px;
    min-width: 120px;
}

.progress-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    flex-wrap: wrap;
    gap: 15px;
}

.progress {
    font-size: clamp(1rem, 2.5vw, 1.2rem);
    color: var(--secondary-blue);
    font-weight: bold;
    
    background: rgba(30, 41, 59, 0.8);
    padding: 10px 20px;
    border-radius: 10px;
    border: 1px solid var(--secondary-blue);
    flex: 1;
    min-width: 200px;
}

/* Card Grid - 3 cards per row on desktop */
.card-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
    margin: 30px 0;
    width: 100%;
}

.card {
    aspect-ratio: 3/4;
    border-radius: 15px;
    cursor: pointer;
    box-shadow: 
        0 8px 25px rgba(59, 130, 246, 0.3),
        0 0 15px rgba(139, 92, 246, 0.2);
    transition: all 0.4s ease;
    position: relative;
    transform-style: preserve-3d;
    perspective: 1000px;
    min-height: 280px;
}

.card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    text-align: center;
    transition: transform 0.8s;
    transform-style: preserve-3d;
    border-radius: 15px;
}

.card.flipped .card-inner {
    transform: rotateY(180deg);
}

.card-front, .card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    border-radius: 15px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
    padding: 20px;
    overflow: hidden;
}

.card-front {
    background: linear-gradient(135deg, var(--card-blue), var(--card-purple));
    color: white;
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: bold;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
    justify-content: center;
}

.card-back {
    background: linear-gradient(135deg, #1e293b, #0f172a);
    color: var(--text-bright);
    transform: rotateY(180deg);
    text-align: center;
    border: 2px solid var(--primary-blue);
}

/* Enhanced Card Shine Effect */
.card-shine {
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(
        45deg, 
        transparent, 
        rgba(59, 130, 246, 0.2), 
        rgba(139, 92, 246, 0.4), 
        rgba(59, 130, 246, 0.2), 
        transparent
    );
    transform: rotate(45deg);
    animation: enhancedShine 4s infinite;
    opacity: 0;
}

@keyframes enhancedShine {
    0% { 
        transform: translateX(-100%) translateY(-100%) rotate(45deg);
        opacity: 0;
    }
    50% {
        opacity: 1;
    }
    100% { 
        transform: translateX(100%) translateY(100%) rotate(45deg);
        opacity: 0;
    }
}

.card:hover:not(.seen) {
    transform: translateY(-10px) scale(1.05);
    box-shadow: 
        0 15px 35px rgba(59, 130, 246, 0.5),
        0 0 20px rgba(139, 92, 246, 0.4);
}

.card:hover:not(.seen) .card-shine {
    animation: enhancedShine 2s infinite;
}

/* FIXED: Text occupies entire card area */
.card-back .fact-text {
    line-height: 1.5;
    font-weight: 600;
    color: var(--text-bright);
    font-size: clamp(0.9rem, 1.8vw, 1.1rem);
    text-align: center;
    width: 100%;
    background: rgba(0, 0, 0, 0.6);
    border-radius: 10px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    max-height: none;
    overflow: visible;
    flex: 1;
    margin-bottom: 10px;
    padding: 20px;
    white-space: normal;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

/* Listen Button Styles */
.listen-btn {
    background: linear-gradient(135deg, var(--accent-purple), var(--light-purple));
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: bold;
    cursor: pointer;
    box-shadow: 
        0 2px 8px rgba(139, 92, 246, 0.4),
        0 0 5px rgba(168, 85, 247, 0.3);
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    min-width: 120px;
    margin-top: auto;
    flex-shrink: 0;
}

.listen-btn:hover {
    transform: translateY(-2px);
    box-shadow: 
        0 4px 12px rgba(139, 92, 246, 0.6),
        0 0 8px rgba(168, 85, 247, 0.4);
    background: linear-gradient(135deg, var(--light-purple), var(--accent-purple));
}

.listen-btn:active {
    transform: translateY(0);
}

.card.seen {
    opacity: 0.6;
    transform: scale(0.95);
    cursor: default;
}

.card.seen .card-front {
    background: linear-gradient(135deg, #4b5563, #374151);
}

.card.seen:hover {
    transform: scale(0.95);
}

.cyber-panel {
    padding: 20px;
    background: var(--panel-bg);
    border-radius: 15px;
    border: 2px solid var(--accent-purple);
    box-shadow: 
        0 0 30px rgba(139, 92, 246, 0.3),
        inset 0 0 30px rgba(139, 92, 246, 0.1);
    position: relative;
}

.quiz-container {
    margin: 20px 0;
    padding: 20px;
    background: var(--panel-bg);
    border-radius: 15px;
    border: 2px solid var(--primary-blue);
    box-shadow: inset 0 0 20px rgba(59, 130, 246, 0.2);
}

.quiz-question {
    font-size: clamp(1.2rem, 3vw, 1.5rem);
    margin-bottom: 30px;
    line-height: 1.5;
    font-weight: bold;
    color: var(--text-bright);
    background: rgba(0, 0, 0, 0.4);
    padding: 20px;
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.8);
}

.quiz-options {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.quiz-option {
    padding: 15px;
    background: linear-gradient(135deg, #1e293b, #0f172a);
    border: 2px solid var(--secondary-blue);
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: left;
    font-size: clamp(1rem, 2.5vw, 1.2rem);
    color: var(--text-bright);
    font-weight: 500;
}

.quiz-option:hover {
    background: linear-gradient(135deg, #334155, #1e293b);
    border-color: var(--accent-purple);
    transform: translateX(5px);
}

.quiz-option.correct {
    background: linear-gradient(135deg, #047857, #065f46);
    border-color: var(--success-color);
    color: white;
}

.quiz-option.incorrect {
    background: linear-gradient(135deg, #b91c1c, #991b1b);
    border-color: var(--error-color);
    color: white;
}

.feedback {
    margin-top: 25px;
    font-size: clamp(1.1rem, 2.5vw, 1.4rem);
    font-weight: bold;
    min-height: 40px;
    padding: 15px;
    border-radius: 10px;
    color: var(--text-bright);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.8);
}

.feedback.correct {
    color: var(--success-color);
    background: rgba(16, 185, 129, 0.2);
    border: 1px solid var(--success-color);
}

.feedback.incorrect {
    color: var(--error-color);
    background: rgba(239, 68, 68, 0.2);
    border: 1px solid var(--error-color);
}

.completion-message {
    font-size: clamp(1.2rem, 3vw, 1.6rem);
    margin: 30px 0;
    line-height: 1.8;
    color: var(--text-bright);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.8);
}

.completion-message p {
    margin-bottom: 20px;
    font-weight: 600;
}

/* iPad Responsive */
@media (max-width: 1024px) and (min-width: 769px) {
    .card-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    
    .card {
        min-height: 320px;
    }
    
    .card-back .fact-text {
        font-size: 1rem !important;
        padding: 15px;
    }
    
    .listen-btn {
        padding: 10px 18px;
        font-size: 0.85rem;
        min-width: 130px;
    }
    
    .game-features {
        gap: 20px;
    }
    
    .feature {
        padding: 10px 15px;
    }
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .card-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
    }
    
    .card {
        min-height: 250px;
    }
    
    .card-back .fact-text {
        font-size: 0.85rem !important;
        padding: 12px;
        line-height: 1.4;
    }
    
    .listen-btn {
        padding: 8px 14px;
        font-size: 0.75rem;
        min-width: 110px;
    }
    
    .return-btn {
        position: relative;
        top: auto;
        right: auto;
        margin-bottom: 20px;
    }
    
    .game-features {
        flex-direction: column;
        gap: 15px;
    }
    
    .feature {
        justify-content: center;
    }
}

/* Small Mobile Responsive */
@media (max-width: 480px) {
    .card-grid {
        grid-template-columns: 1fr;
        gap: 12px;
        max-width: 300px;
        margin-left: auto;
        margin-right: auto;
    }
    
    .card {
        min-height: 220px;
        max-width: 280px;
    }
    
    .card-back .fact-text {
        font-size: 0.8rem !important;
        padding: 10px;
    }
    
    .listen-btn {
        padding: 6px 12px;
        font-size: 0.7rem;
        min-width: 100px;
    }
}

/* Very Small Mobile */
@media (max-width: 360px) {
    .card-grid {
        grid-template-columns: 1fr;
        gap: 10px;
    }
    
    .card {
        max-width: 260px;
        min-height: 200px;
    }
    
    .card-back .fact-text {
        font-size: 0.75rem !important;
    }
    
    .listen-btn {
        padding: 5px 10px;
        font-size: 0.65rem;
        min-width: 90px;
    }
}

/* Large Desktop */
@media (min-width: 1200px) {
    .card-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 30px;
    }
    
    .card {
        min-height: 300px;
    }
    
    .card-back .fact-text {
        font-size: 1rem !important;
    }
    
    .listen-btn {
        padding: 10px 20px;
        font-size: 0.9rem;
        min-width: 140px;
    }
}