:root {
    --bs-primary: #4F46E5;
    --bs-secondary: #10B981;
    --bs-accent: #F59E0B;
    --bs-neutral-light: #F9FAFB;
    --bs-neutral-dark: #111827;
    --bs-font-sans-serif: "Inter", sans-serif;
    --bs-font-monospace: "Poppins", sans-serif;
}

body {
    font-family: var(--bs-font-sans-serif);
    background-color: var(--bs-neutral-light);
    color: var(--bs-neutral-dark);
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--bs-font-monospace);
    font-weight: 600;
}

.btn-primary {
    background-color: var(--bs-primary);
    border-color: var(--bs-primary);
}

.btn-primary:hover {
    background-color: #4338ca;
    border-color: #4338ca;
}

.btn-secondary {
    background-color: var(--bs-secondary);
    border-color: var(--bs-secondary);
}

.btn-secondary:hover {
    background-color: #059669;
    border-color: #059669;
}

.bg-gradient-primary {
    background: linear-gradient(90deg, var(--bs-primary), var(--bs-secondary));
}

.hero-section {
    padding: 6rem 0;
    color: white;
}

.question-card {
    border: 1px solid #e5e7eb;
    border-radius: 0.5rem;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    background-color: white;
}

.question-card h5 {
    font-weight: 600;
}

.question-card .options {
    list-style-type: none;
    padding-left: 0;
}

.question-card .options li {
    padding: 0.5rem 0;
}

.question-card .explanation {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid #e5e7eb;
    font-size: 0.9rem;
}