.calculator-hero {
    background: radial-gradient(circle at top right, rgba(255, 204, 0, 0.22), transparent 45%), linear-gradient(135deg, #0f2027, #203a43, #2c5364);
    padding: clamp(3rem, 5vw, 4.5rem) 0;
    color: #ffffff;
}

.hero-eyebrow {
    text-transform: uppercase;
    letter-spacing: 0.3rem;
    color: #ffcc00;
    font-weight: 700;
    font-size: 0.9rem;
}

.calculator-hero .lead {
    color: rgba(255, 255, 255, 0.9);
}

.hero-list {
    list-style: none;
    padding-left: 0;
    margin: 0;
    color: rgba(255, 255, 255, 0.9);
}

.hero-list li {
    display: flex;
    gap: 0.5rem;
    align-items: flex-start;
    margin-bottom: 0.45rem;
}

.hero-list li::before {
    content: "";
    display: block;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #ffcc00;
    margin-top: 0.4rem;
}

.hero-widget {
    background: rgba(8, 20, 32, 0.85);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 14px;
    padding: 1.75rem;
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.18);
    color: #f6f7fb;
}

.hero-widget-label {
    letter-spacing: 0.16rem;
    color: rgba(255, 255, 255, 0.75);
    font-size: 0.85rem;
    margin-bottom: 0.4rem;
}

.hero-widget h3 {
    color: #ffffff;
    margin-bottom: 0.35rem;
}

.hero-widget-value {
    font-size: 2.1rem;
    font-weight: 700;
    color: #ffcc00;
    margin-bottom: 0.25rem;
}

.hero-widget-note {
    color: rgba(255, 255, 255, 0.88);
    margin-bottom: 0;
}

.calculator-section {
    background: #f6f8fb;
    padding: clamp(2.5rem, 4vw, 4rem) 0;
}

.calculator-grid.card-grid {
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.25rem;
}

.calculator-card {
    padding: 1.15rem;
    box-shadow: 0 12px 26px rgba(0, 0, 0, 0.08);
    gap: 0.5rem;
    overflow: visible;
}

.calc-header {
    display: flex;
    justify-content: space-between;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
}

.calc-header h3 {
    color: #1f2937;
    margin-bottom: 0.25rem;
}

.calc-header p {
    margin-bottom: 0;
    color: #475467;
    line-height: 1.4;
}

.formula-info {
    border: 1px solid #ffcc00;
    background: rgba(255, 204, 0, 0.18);
    color: #0f2027;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    font-weight: 700;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    position: relative;
    cursor: pointer;
    flex-shrink: 0;
}

.formula-info::after {
    content: attr(data-formula);
    position: absolute;
    top: 110%;
    left: 50%;
    transform: translate(-50%, 0);
    display: block;
    background: #0f2027;
    color: #fff;
    padding: 0.6rem 0.9rem;
    border-radius: 10px;
    min-width: 180px;
    max-width: min(240px, calc(100vw - 32px));
    width: max-content;
    font-size: 0.8rem;
    line-height: 1.3;
    text-align: left;
    white-space: normal;
    word-break: break-word;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
    z-index: 2;
}

.formula-info:hover::after,
.formula-info:focus::after {
    opacity: 1;
}

.calculator-card .form-group {
    margin-bottom: 0.75rem;
}

.calculator-card label {
    font-weight: 600;
    color: #1f2937;
}

.calculator-card .form-control {
    border-radius: 10px;
    border: 1px solid #d1d5db;
    font-size: 1rem;
}

.calculator-card .form-control:focus {
    border-color: #3b5998;
    box-shadow: 0 0 0 0.15rem rgba(59, 89, 152, 0.15);
}

.calculator-result {
    margin-top: 0.75rem;
    padding: 0.9rem;
    border-radius: 12px;
    background: #f1f5f9;
    font-weight: 700;
    color: #0f2027;
}

.calculator-cta {
    background: #fff;
    border: 1px solid #e5e7eb;
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 12px 26px rgba(0, 0, 0, 0.08);
}

.calculator-cta h4 {
    margin-bottom: 0.4rem;
}

.calculator-cta p {
    margin-bottom: 1rem;
    color: #1f2937;
}

.calculator-cta .btn-primary {
    background: #ffcc00;
    color: #0f2027;
    border-color: #ffcc00;
    font-weight: 700;
    padding: 10px 20px;
    border-radius: 10px;
}

.calculator-cta .btn-primary:hover {
    background: #e6b800;
    border-color: #e6b800;
    color: #0a1820;
}

@media (max-width: 991px) {
    .calculator-hero {
        text-align: center;
    }

    .hero-widget {
        margin-top: 1.5rem;
    }

    .calc-header {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (max-width: 768px) {
    .formula-info::after {
        left: 0;
        transform: translate(0, 0);
    }
}