:root {
    --brand:       #12A19A;
    --brand-dark:  #0e8880;
    --brand-light: rgba(18, 161, 154, 0.08);
    --brand-ring:  rgba(18, 161, 154, 0.20);
    --text:        #2d2d2d;
    --text-muted:  #6c757d;
    --border:      #e4e8ec;
    --bg:          #f8f9fa;
    --white:       #ffffff;
    --radius:      10px;
    --shadow-sm:   0 2px 6px rgba(0, 0, 0, 0.07);
    --shadow-md:   0 4px 16px rgba(0, 0, 0, 0.10);
    --transition:  0.2s ease;
}

/* ─── BASE ─────────────────────────────────────────────── */

html, body {
    height: 100%;
    margin: 0;
    font-family: 'Poppins', sans-serif;
    color: var(--text);
    background: var(--bg);
    scroll-behavior: smooth;
    display: flex;
    flex-direction: column;
}

.container-fluid {
    padding: 90px 15px 50px;
}

/* ─── NAVBAR ────────────────────────────────────────────── */

.navbar {
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(6px);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 999;
    box-shadow: var(--shadow-sm);
}

.navbar-brand img {
    height: 46px;
}

.navbar-nav {
    display: flex;
    gap: 4px;
}

.navbar-nav .nav-link {
    color: var(--text);
    font-weight: 500;
    font-size: 0.875rem;
    padding: 8px 14px;
    border-radius: var(--radius);
    text-transform: uppercase;
    letter-spacing: 0.03em;
    transition: background var(--transition), color var(--transition);
}

.navbar-nav .nav-link:hover {
    background: var(--brand);
    color: var(--white);
}

.navbar-toggler {
    border: none;
    box-shadow: none !important;
}

/* ─── FOOTER ────────────────────────────────────────────── */

.footer-info {
    background: var(--white);
    color: var(--text-muted);
    padding: 24px 0;
    text-align: center;
    font-size: 0.85rem;
    border-top: 1px solid var(--border);
    margin-top: auto;
}

.footer-info a {
    color: var(--brand);
    text-decoration: none;
    font-weight: 500;
}

.footer-info a:hover {
    text-decoration: underline;
}

/* ─── BUTTONS ───────────────────────────────────────────── */

.btn-primary {
    background: var(--brand);
    border: none;
    color: var(--white);
    font-weight: 600;
    border-radius: var(--radius);
    transition: background var(--transition), transform var(--transition);
}

.btn-primary:hover,
.btn-primary:focus {
    background: var(--brand-dark);
    color: var(--white);
    transform: translateY(-1px);
}

.btn-container {
    text-align: center;
    margin-top: 32px;
}

.btn-container .btn-primary {
    min-width: 180px;
    padding: 12px 28px;
    font-size: 1rem;
}

/* ─── QUESTION CARDS ────────────────────────────────────── */

.question-card {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 24px;
    margin-bottom: 20px;
    box-shadow: var(--shadow-sm);
}

.question-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 20px;
    line-height: 1.5;
}

/* ─── RADIO GROUP ───────────────────────────────────────── */

.radio-group {
    display: flex;
    gap: 10px;
    flex-wrap: nowrap;
}

.radio-label {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 80px;
    padding: 14px 10px;
    border: 2px solid var(--border);
    border-radius: var(--radius);
    cursor: pointer;
    text-align: center;
    background: var(--white);
    transition: border-color var(--transition), background var(--transition), box-shadow var(--transition);
}

.radio-label:hover {
    border-color: var(--brand);
    background: var(--brand-light);
}

.radio-label:has(input:checked) {
    border-color: var(--brand);
    background: var(--brand-light);
    box-shadow: 0 0 0 3px var(--brand-ring);
}

.radio-size {
    margin-bottom: 8px;
    transform: scale(1.2);
    accent-color: var(--brand);
}

.radio-option {
    font-size: 0.9rem;
    line-height: 1.4;
    color: var(--text);
}

/* ─── MOBILE ────────────────────────────────────────────── */

@media (max-width: 768px) {
    .radio-group {
        flex-direction: column;
    }

    .radio-label {
        flex-direction: row;
        justify-content: flex-start;
        text-align: left;
        min-height: auto;
        padding: 12px 14px;
    }

    .radio-size {
        margin-bottom: 0;
        margin-right: 14px;
        flex-shrink: 0;
    }
}