:root {
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --secondary: #ec4899;
    --bg-dark: #0f172a;
    --card-bg: rgba(23, 33, 58, 0.7);
    --text-main: #f8fafc;
    --text-dim: #94a3b8;
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-shadow: rgba(0, 0, 0, 0.4);
    --success: #22c55e;
    --error: #ef4444;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
}

body {
    font-family: 'Plus Jakarta Sans', sans-serif;
    background-color: var(--bg-dark);
    background-image:
        radial-gradient(circle at 0% 0%, rgba(99, 102, 241, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 100% 100%, rgba(236, 72, 153, 0.15) 0%, transparent 50%);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    overflow-x: hidden;
}

#app {
    width: 100%;
    max-width: 900px;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--glass-border);
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    font-family: 'Outfit', sans-serif;
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.progress-wrapper {
    text-align: right;
    width: 300px;
}

.progress-text {
    font-size: 0.875rem;
    color: var(--text-dim);
    margin-bottom: 0.5rem;
}

.progress-bar-container {
    height: 6px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 10px;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    transition: width 0.4s ease;
}

main {
    flex: 1;
}

.glass-panel {
    background: var(--card-bg);
    backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 2rem;
    box-shadow: 0 20px 40px var(--glass-shadow);
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.image-comparison {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.image-card {
    position: relative;
    border-radius: 16px;
    overflow: hidden;
    background: #000;
    max-height: 320px;
    aspect-ratio: 1 / 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.image-card img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    transition: transform 0.3s ease;
}

.image-card:hover img {
    transform: scale(1.02);
}

.badge {
    position: absolute;
    top: 1rem;
    left: 1rem;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    z-index: 2;
    border: 1px solid var(--glass-border);
}

.heatmap-badge {
    background: rgba(99, 102, 241, 0.2);
    border-color: var(--primary);
}

.interaction-area {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    text-align: center;
}

h2 {
    font-family: 'Outfit', sans-serif;
    font-size: 1.25rem;
    line-height: 1.4;
    max-width: 800px;
    margin: 0 auto;
}

.options-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    max-width: 900px;
    margin: 0 auto;
    width: 100%;
}

.option-btn {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--glass-border);
    padding: 1rem;
    border-radius: 12px;
    color: var(--text-main);
    font-family: 'Outfit', sans-serif;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.option-btn:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateY(-2px);
    border-color: var(--primary);
}

.option-btn.correct {
    background: rgba(34, 197, 94, 0.2);
    border-color: var(--success);
}

.option-btn.wrong {
    background: rgba(239, 68, 68, 0.2);
    border-color: var(--error);
}

.hidden {
    display: none !important;
}

#feedback-area {
    animation: fadeIn 0.5s ease;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.feedback-message {
    font-size: 1.25rem;
    font-weight: 700;
}

.trust-survey {
    background: rgba(0, 0, 0, 0.2);
    padding: 1.5rem;
    border-radius: 20px;
    border: 1px dashed var(--glass-border);
}

.trust-buttons {
    display: flex;
    justify-content: center;
    gap: 0.75rem;
    margin-top: 1.5rem;
}

.trust-btn {
    width: 50px;
    height: 50px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    color: var(--text-main);
    cursor: pointer;
    font-weight: 700;
    transition: all 0.2s;
}

.trust-btn:hover {
    background: var(--primary);
    transform: scale(1.1);
}

.trust-btn.selected {
    background: var(--primary);
    box-shadow: 0 0 20px rgba(99, 102, 241, 0.4);
}

.primary-btn {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    border: none;
    padding: 1rem 3rem;
    border-radius: 12px;
    font-size: 1.125rem;
    font-weight: 700;
    cursor: pointer;
    align-self: center;
    transition: transform 0.2s, box-shadow 0.2s;
}

.primary-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(99, 102, 241, 0.3);
}

footer {
    text-align: center;
    color: var(--text-dim);
    font-size: 0.875rem;
    padding: 2rem 0;
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.stats-grid {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    margin-top: 2rem;
    width: 100%;
}

.stat-group {
    background: rgba(255, 255, 255, 0.03);
    padding: 1.5rem;
    border-radius: 20px;
    border: 1px solid var(--glass-border);
}

.stat-group h3 {
    font-size: 1rem;
    color: var(--text-dim);
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.stat-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.stat-card {
    background: rgba(0, 0, 0, 0.2);
    padding: 1.5rem;
    border-radius: 16px;
    text-align: center;
}

.stat-card span {
    display: block;
    font-size: 2rem;
    font-weight: 800;
    font-family: 'Outfit', sans-serif;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.stat-card label {
    font-size: 0.75rem;
    color: var(--text-dim);
    margin-top: 0.5rem;
    display: block;
}

@media (max-width: 768px) {
    .image-comparison {
        grid-template-columns: 1fr;
    }

    .options-grid {
        grid-template-columns: 1fr;
    }

    .glass-panel {
        padding: 1.5rem;
    }
}