:root {
    --bg-color: #0f172a;
    --card-bg: rgba(30, 41, 59, 0.7);
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --gradient-1: #3b82f6;
    --gradient-2: #8b5cf6;
    --correct: #10b981;
    --incorrect: #ef4444;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Outfit', sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    position: relative;
}

/* Background Animated Blobs */
.background-elements {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.5;
    animation: float 10s infinite ease-in-out alternate;
}

.blob-1 {
    width: 400px;
    height: 400px;
    background: var(--gradient-1);
    top: -100px;
    left: -100px;
}

.blob-2 {
    width: 500px;
    height: 500px;
    background: var(--gradient-2);
    bottom: -150px;
    right: -100px;
    animation-delay: -5s;
}

@keyframes float {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(50px, 50px) scale(1.1); }
}

.app-container {
    width: 100%;
    max-width: 800px;
    padding: 20px;
    position: relative;
    z-index: 10;
}

.screen {
    display: none;
    animation: fadeIn 0.5s ease-out;
}

.screen.active {
    display: block;
}

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

/* Glassmorphism Card */
.glass-card {
    background: var(--card-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 24px;
    padding: 40px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    text-align: center;
}

.quiz-card {
    padding: 30px;
}

.gradient-text {
    font-size: 3rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--gradient-1), var(--gradient-2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 20px;
}

p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 30px;
}

.primary-btn {
    background: linear-gradient(135deg, var(--gradient-1), var(--gradient-2));
    color: white;
    border: none;
    padding: 15px 40px;
    font-size: 1.2rem;
    font-weight: 600;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 10px 20px rgba(59, 130, 246, 0.3);
}

.primary-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 25px rgba(59, 130, 246, 0.5);
}

/* Quiz Screen Specifics */
.progress-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    font-weight: 600;
}

.progress-bar {
    flex-grow: 1;
    height: 8px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    margin-left: 20px;
    overflow: hidden;
}

#progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--gradient-1), var(--gradient-2));
    width: 0%;
    transition: width 0.4s ease;
}

.question-container {
    margin-bottom: 30px;
}

.image-wrapper {
    width: 100%;
    height: 250px;
    border-radius: 16px;
    overflow: hidden;
    margin-bottom: 20px;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.3);
}

#question-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.image-wrapper:hover #question-image {
    transform: scale(1.05);
}

#question-text {
    font-size: 1.5rem;
    font-weight: 600;
}

.options-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

.option-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    padding: 15px 20px;
    font-size: 1.1rem;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: left;
    display: flex;
    align-items: center;
}

.option-btn:hover:not(:disabled) {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
    border-color: rgba(255, 255, 255, 0.3);
}

.option-btn.correct {
    background: rgba(16, 185, 129, 0.2);
    border-color: var(--correct);
    color: var(--correct);
    animation: popIn 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.option-btn.incorrect {
    background: rgba(239, 68, 68, 0.2);
    border-color: var(--incorrect);
    color: var(--incorrect);
    animation: shake 0.4s ease-in-out;
}

@keyframes popIn {
    0% { transform: scale(0.9); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20%, 60% { transform: translateX(-5px); }
    40%, 80% { transform: translateX(5px); }
}

/* End Screen */
.score-display {
    font-size: 2rem;
    margin: 20px 0;
}

.highlight {
    color: var(--gradient-1);
    font-weight: 800;
    font-size: 3rem;
}

.popcorn-reward {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 16px;
    padding: 20px;
    margin: 30px 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    border: 1px dashed rgba(255, 255, 255, 0.2);
}

#popcorn-image {
    width: 150px;
    height: 150px;
    object-fit: cover;
    border-radius: 50%;
    margin-bottom: 15px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
    animation: float 4s infinite ease-in-out alternate;
}

@media (max-width: 600px) {
    .options-grid {
        grid-template-columns: 1fr;
    }
    
    .glass-card {
        padding: 20px;
    }
    
    .gradient-text {
        font-size: 2rem;
    }
}