:root {
    --bg: #f7faf9;
    --surface: #ffffff;
    --ink: #17211d;
    --muted: #5f6f68;
    --line: #dce7e2;
    --brand: #0f7a5f;
    --brand-dark: #075c47;
    --accent: #f2a541;
    --ok-bg: #e9f7f1;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    line-height: 1.6;
    color: var(--ink);
    background: var(--bg);
}

a {
    color: var(--brand-dark);
}

header {
    background: var(--surface);
    border-bottom: 1px solid var(--line);
}

.topbar {
    max-width: 1120px;
    margin: 0 auto;
    padding: 18px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
}

.brand {
    font-weight: 800;
    font-size: 1.2rem;
    color: var(--ink);
    text-decoration: none;
}

nav {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    font-size: 0.92rem;
}

nav a {
    text-decoration: none;
    color: var(--muted);
}

nav a:hover {
    color: var(--brand-dark);
}

.hero {
    max-width: 1120px;
    margin: 0 auto;
    padding: 52px 20px 36px;
}

.eyebrow {
    color: var(--brand);
    font-weight: 700;
    text-transform: uppercase;
    font-size: 0.78rem;
    letter-spacing: 0;
}

h1,
h2,
h3 {
    line-height: 1.15;
    margin: 0 0 12px;
}

h1 {
    font-size: 2.65rem;
    max-width: 780px;
}

.hero p {
    max-width: 760px;
    color: var(--muted);
    font-size: 1.08rem;
}

main {
    max-width: 1120px;
    margin: 0 auto;
    padding: 20px;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
    gap: 16px;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 24px;
}

.primary-link,
.secondary-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 11px 16px;
    border-radius: 6px;
    font-weight: 800;
    text-decoration: none;
}

.primary-link {
    background: var(--brand);
    color: #fff;
}

.primary-link:hover {
    background: var(--brand-dark);
    color: #fff;
}

.secondary-link {
    background: var(--surface);
    border: 1px solid var(--line);
    color: var(--brand-dark);
}

.intent-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.25fr) minmax(260px, 0.75fr);
    gap: 18px;
}

.tool-card,
.panel,
.calculator {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 8px;
}

.tool-card {
    padding: 18px;
    text-decoration: none;
    color: var(--ink);
    display: block;
}

.tool-card:hover {
    border-color: var(--brand);
}

.tool-card p,
.panel p,
.calculator p,
.faq p {
    color: var(--muted);
}

.section {
    margin: 36px 0;
}

.calculator {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(280px, 420px);
    gap: 22px;
    padding: 22px;
}

.calculator-form {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
}

.calculator-form .full-row {
    grid-column: 1 / -1;
}

label {
    display: grid;
    gap: 6px;
    font-weight: 700;
}

input,
select {
    width: 100%;
    padding: 11px 12px;
    border: 1px solid #bfd0c8;
    border-radius: 6px;
    font: inherit;
    background: #fff;
}

button {
    width: fit-content;
    min-width: 150px;
    padding: 12px 16px;
    border: 0;
    border-radius: 6px;
    background: var(--brand);
    color: #fff;
    font-weight: 800;
    cursor: pointer;
}

button:hover {
    background: var(--brand-dark);
}

.secondary-button {
    margin-top: 12px;
    background: #263b33;
}

.results {
    min-height: 180px;
    padding: 18px;
    background: var(--ok-bg);
    border: 1px solid #b9dfce;
    border-radius: 8px;
}

.result-number {
    font-size: 2rem;
    font-weight: 800;
    color: var(--brand-dark);
    margin: 6px 0;
}

.result-list {
    padding-left: 18px;
}

.breakdown {
    width: 100%;
    margin: 14px 0;
    border-collapse: collapse;
    font-size: 0.95rem;
}

.breakdown th,
.breakdown td {
    padding: 9px 0;
    border-bottom: 1px solid #cfe5db;
    text-align: left;
    vertical-align: top;
}

.breakdown th {
    width: 58%;
    color: var(--muted);
    font-weight: 700;
}

.breakdown td {
    text-align: right;
    font-weight: 800;
}

.assumptions {
    margin-top: 14px;
    padding: 14px;
    border-radius: 8px;
    background: #fff;
    border: 1px solid #cfe5db;
}

.assumptions ul {
    margin: 0;
    padding-left: 18px;
    color: var(--muted);
}

.ad-slot {
    margin: 24px 0;
    padding: 18px;
    min-height: 90px;
    display: grid;
    place-items: center;
    border: 1px dashed #b6c7c0;
    border-radius: 8px;
    color: var(--muted);
    background: #fbfdfc;
    font-size: 0.9rem;
}

.faq {
    display: grid;
    gap: 12px;
}

.faq article,
.panel {
    padding: 18px;
}

footer {
    margin-top: 40px;
    padding: 28px 20px;
    border-top: 1px solid var(--line);
    color: var(--muted);
    text-align: center;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
    margin-top: 12px;
}

.footer-links a {
    color: var(--brand-dark);
    font-weight: 700;
}

.content-page {
    max-width: 820px;
}

.content-page h2 {
    margin-top: 28px;
}

.content-page ul {
    padding-left: 22px;
    color: var(--muted);
    line-height: 1.7;
}

.compact-list {
    margin: 0;
    padding-left: 18px;
    color: var(--muted);
}

.formula {
    padding: 14px;
    border-radius: 8px;
    background: #f9fcfb;
    border: 1px solid var(--line);
    color: var(--ink);
    font-weight: 700;
}

@media (max-width: 760px) {
    .topbar {
        align-items: flex-start;
        flex-direction: column;
    }

    h1 {
        font-size: 2rem;
    }

    .calculator {
        grid-template-columns: 1fr;
    }

    .intent-grid {
        grid-template-columns: 1fr;
    }

    .calculator-form {
        grid-template-columns: 1fr;
    }

    button {
        width: 100%;
    }
}