.question-card {
    border: none;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    transition: transform 0.2s, box-shadow 0.2s;
    margin-bottom: 1.5rem;
}

.question-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
}

.question-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 1.5rem;
    border-radius: 0.5rem 0.5rem 0 0;
}

.question-number {
    background: rgba(255,255,255,0.2);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
}

.category-badge {
    background: rgba(255,255,255,0.2);
    padding: 0.25rem 0.75rem;
    border-radius: 15px;
    font-size: 0.75rem;
    font-weight: 500;
}

.answer-section {
    padding: 1.5rem;
}

.tips-section {
    background: #f8f9fa;
    padding: 1rem 1.5rem;
    border-radius: 0 0 0.5rem 0.5rem;
    border-top: 1px solid #e9ecef;
}

.hero-section {
    background: #0a0e27;
    color: white;
    padding: 2.5rem 0;
    margin-bottom: 2rem;
    border-radius: 0.75rem;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 300px;
    height: 300px;
    background: rgba(255,255,255,0.1);
    border-radius: 50%;
    animation: float 6s ease-in-out infinite;
}

.hero-section::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 200px;
    height: 200px;
    background: rgba(255,255,255,0.08);
    border-radius: 50%;
    animation: float 8s ease-in-out infinite reverse;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

.filter-buttons {
    margin-bottom: 2rem;
}

.filter-btn {
    margin: 0.25rem;
    border-radius: 20px;
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.filter-btn.active {
    background: #667eea;
    border-color: #667eea;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 30% 50%, rgba(120, 119, 198, 0.3) 0%, transparent 50%), radial-gradient(circle at 80% 20%, rgba(255, 119, 198, 0.15) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 2;
}