:root {
    --calculator-card-bg: #ffffff;
    --calculator-panel-bg: #f6f8f1;
    --calculator-line: #e6eadd;
    --calculator-energy: #2e4708;
    --calculator-section-space: clamp(3rem, 2rem + 4vw, 5.5rem);
}

/* Logged-in visitors may use dark mode, unlike the guest-only start page */
body.dark-mode {
    --calculator-card-bg: #1f251a;
    --calculator-panel-bg: #181d14;
    --calculator-line: #343c2c;
    --calculator-energy: #b9dc7f;
}

body.dark-mode .calculator {
    --landing-ink: #eef2e6;
    --landing-text: #d3d8cb;
    --landing-muted: #a7af9c;
}

.calculator section {
    padding: 0;
}

/* Hero with the form */
.calculator-hero {
    padding-block: clamp(1.5rem, 0.5rem + 4vw, 4rem) var(--calculator-section-space);
}

.calculator-hero-inner {
    display: grid;
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
    align-items: start;
    gap: clamp(2rem, 4vw, 4.5rem);
}

.calculator .landing-title {
    font-size: clamp(2.3rem, 1.4rem + 3vw, 4rem);
}

.calculator-lead {
    margin: 0;
    font-size: var(--landing-list-size);
    line-height: 1.5;
    color: var(--landing-muted);
}

.calculator-form {
    padding: clamp(1.2rem, 0.8rem + 1.5vw, 2rem);
    border: 1px solid var(--calculator-line);
    border-radius: var(--r-lg);
    background-color: var(--calculator-card-bg);
    box-shadow: var(--shadow-md);
}

.calculator-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 700;
    color: var(--landing-ink);
}

.calculator-form textarea {
    width: 100%;
    min-height: 12rem;
    resize: vertical;
    font-size: 1rem;
    line-height: 1.5;
}

.calculator-form .errors {
    margin-top: 0.8rem;
}

.calculator .calculator-submit {
    width: 100%;
    margin-top: 1rem;
    padding: 0.85em 1.4em;
    font-size: 1.15rem;
}

.calculator-note {
    margin: 0.8rem 0 0;
    font-weight: 600;
    text-align: center;
    color: var(--landing-muted);
}

.calculator-legal {
    margin: 0.4rem 0 0;
    font-size: 0.85rem;
    line-height: 1.45;
    text-align: center;
    color: var(--landing-muted);
}

/* Example result */
.calculator-example {
    padding-block: var(--calculator-section-space);
    background-color: var(--calculator-panel-bg);
}

.example-card {
    display: grid;
    grid-template-columns: minmax(0, 2fr) minmax(0, 3fr);
    overflow: hidden;
    border-radius: var(--r-lg);
    background-color: var(--calculator-card-bg);
    box-shadow: var(--shadow-sm);
}

.example-media img {
    display: block;
    width: 100%;
    height: 100%;
    min-height: 14rem;
    object-fit: cover;
}

.example-body {
    padding: clamp(1.2rem, 0.8rem + 1.5vw, 2.2rem);
}

.calculator .example-title {
    margin: 0;
    font-size: 1.5rem;
    line-height: 1.2;
}

.example-title a {
    color: var(--landing-ink);
    text-decoration: none;
}

.example-subtitle {
    margin: 0.3rem 0 1.2rem;
    color: var(--landing-muted);
}

.example-values {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0.6rem;
    margin: 0 0 1.4rem;
}

.example-value {
    padding: 0.7rem 0.8rem;
    border-radius: var(--r-md);
    background-color: var(--calculator-panel-bg);
}

.example-value dt {
    font-size: 0.85rem;
    color: var(--landing-muted);
}

.example-value dd {
    margin: 0.15rem 0 0;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--landing-ink);
}

.example-value.is-energy dd {
    color: var(--calculator-energy);
}

.example-lines {
    width: 100%;
    border-collapse: collapse;
}

.example-lines th,
.example-lines td {
    padding: 0.45rem 0.3rem;
    border-bottom: 1px solid var(--calculator-line);
    text-align: left;
}

.example-lines th {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--landing-muted);
}

.example-lines th:not(:first-child),
.example-lines td:not(:first-child) {
    text-align: right;
    white-space: nowrap;
}

/* Steps */
.calculator-steps {
    padding-block: var(--calculator-section-space) 0;
}

.step-list {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 2rem 3rem;
    margin: 0;
    padding: 0;
    list-style: none;
    counter-reset: step;
}

.step-list li {
    counter-increment: step;
}

.step-list li::before {
    content: counter(step);
    display: grid;
    place-items: center;
    width: 2.4rem;
    height: 2.4rem;
    margin-bottom: 0.8rem;
    border-radius: 50%;
    font-weight: 800;
    color: #fff;
    background-color: var(--brand);
}

.step-list strong {
    display: block;
    margin-bottom: 0.3rem;
    font-size: 1.2rem;
    color: var(--landing-ink);
}

.step-list span {
    color: var(--landing-muted);
}

/* Sources */
.calculator-sources {
    padding-block: var(--calculator-section-space) 0;
}

.calculator-sources p {
    max-width: 70ch;
    font-size: 1.05rem;
    line-height: 1.6;
}

.calculator-sources .calculator-disclaimer {
    font-size: 0.9rem;
    color: var(--landing-muted);
}

/* FAQ */
.calculator-faq {
    padding-block: var(--calculator-section-space);
}

.calculator-faq .faq-list {
    max-width: 75ch;
}

.calculator-again {
    margin: 2rem 0 0;
}

@media (max-width: 960px) {
    .calculator-hero-inner,
    .example-card {
        grid-template-columns: minmax(0, 1fr);
    }

    .example-media img {
        max-height: 16rem;
    }

    .step-list {
        grid-template-columns: minmax(0, 1fr);
    }
}

@media (max-width: 560px) {
    .example-values {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}