@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:wght@400;500;600&display=swap');

:root {
    --bg: #f5f3ee;
    --surface: #ffffff;
    --ink: #111316;
    --muted: #5a5f65;
    --line: #111316;
    --line-soft: #d4d1c8;
    --accent: #b2441d;
    --accent-soft: #f4e6df;
    --space-1: 0.5rem;
    --space-2: 1rem;
    --space-3: 1.5rem;
    --space-4: 2rem;
    --space-5: 3rem;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    background: var(--bg);
    color: var(--ink);
    font-family: "IBM Plex Sans", sans-serif;
    font-size: 16px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a {
    color: inherit;
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 3px;
}

a:hover {
    color: var(--muted);
}

a.plain-link {
    text-decoration: none;
}

h1,
h2,
h3 {
    font-weight: 600;
    line-height: 1.15;
}

h1 {
    font-size: clamp(2rem, 4.8vw, 4rem);
    letter-spacing: -0.03em;
    margin-bottom: var(--space-2);
    max-width: 14ch;
}

h2 {
    font-size: clamp(1.35rem, 2.4vw, 1.8rem);
    margin-bottom: var(--space-2);
    letter-spacing: -0.02em;
}

h3 {
    font-size: 1rem;
    margin-bottom: var(--space-1);
}

p {
    margin-bottom: var(--space-2);
}

.subtitle {
    color: var(--muted);
    font-size: 1.15rem;
    max-width: 44rem;
}

.eyebrow {
    color: var(--accent);
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-bottom: var(--space-2);
}

.container {
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 var(--space-2);
}

.site-header {
    background: var(--surface);
    border-bottom: 1px solid var(--line);
    margin-bottom: var(--space-5);
}

.header-container {
    align-items: center;
    display: flex;
    height: 4.5rem;
    justify-content: space-between;
}

.brand {
    font-size: 1.15rem;
    font-weight: 600;
    letter-spacing: -0.02em;
}

.main-nav {
    display: flex;
    gap: var(--space-3);
}

.main-nav a {
    font-size: 0.95rem;
    text-decoration: none;
}

.main-nav a.active {
    border-bottom: 2px solid var(--ink);
    font-weight: 600;
    padding-bottom: 0.15rem;
}

.hero {
    margin-bottom: var(--space-3);
}

.hero-large {
    padding-top: var(--space-4);
    padding-bottom: var(--space-4);
}

.linework-box {
    background: var(--surface);
    border: 1px solid var(--line);
    margin-bottom: var(--space-3);
    padding: var(--space-3);
}

.nested-box {
    background: transparent;
    border-color: var(--line-soft);
    margin-bottom: 0;
}

.highlight-box {
    border-width: 2px;
}

.grid-2,
.grid-2-asymmetric,
.calc-grid,
.faq-grid,
.step-grid {
    display: grid;
    gap: var(--space-3);
}

.grid-2 {
    grid-template-columns: 1fr 1fr;
}

.grid-2-asymmetric {
    grid-template-columns: minmax(0, 2fr) minmax(280px, 1fr);
}

.calc-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.9fr);
}

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

.step-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.step-item {
    border-top: 1px solid var(--line-soft);
    padding-top: var(--space-2);
}

.step-num {
    color: var(--accent);
    display: inline-block;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: var(--space-1);
}

.step-title {
    margin-bottom: var(--space-1);
}

.step-desc {
    color: var(--muted);
    font-size: 0.95rem;
    margin-bottom: 0;
}

.action-row {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    margin-top: var(--space-3);
}

.button,
button.button {
    background: transparent;
    border: 1px solid var(--line);
    color: var(--ink);
    cursor: pointer;
    display: inline-flex;
    font-family: inherit;
    font-size: 0.95rem;
    font-weight: 500;
    justify-content: center;
    min-height: 2.75rem;
    padding: 0.7rem 1.2rem;
    text-decoration: none;
    transition:
        background-color 140ms ease,
        color 140ms ease,
        border-color 140ms ease;
}

.button.primary {
    background: var(--ink);
    color: var(--surface);
}

.button.primary:hover {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--surface);
}

.button.secondary:hover,
button.button:hover {
    background: var(--ink);
    color: var(--surface);
}

.feature-list {
    list-style: none;
    margin-bottom: var(--space-2);
}

.feature-list li {
    margin-bottom: 0.45rem;
    padding-left: 1rem;
    position: relative;
}

.feature-list li::before {
    color: var(--accent);
    content: "+";
    left: 0;
    position: absolute;
}

.price {
    font-size: 1.2rem;
    font-weight: 600;
}

.metric-list {
    display: grid;
    gap: var(--space-2);
}

.metric-list div {
    border-top: 1px solid var(--line-soft);
    padding-top: 0.8rem;
}

.metric-list dt {
    color: var(--muted);
    font-size: 0.85rem;
    margin-bottom: 0.2rem;
    text-transform: uppercase;
}

.metric-list dd {
    font-size: 1.35rem;
    font-weight: 600;
}

.small-note {
    color: var(--muted);
    font-size: 0.9rem;
    margin-bottom: 0;
    margin-top: var(--space-2);
}

.table-wrapper {
    border: 1px solid var(--line);
    margin-top: var(--space-2);
    overflow-x: auto;
}

table {
    border-collapse: collapse;
    text-align: left;
    width: 100%;
}

th,
td {
    border-bottom: 1px solid var(--line-soft);
    font-size: 0.95rem;
    padding: 0.8rem 1rem;
    vertical-align: top;
}

th {
    background: var(--bg);
    border-bottom-color: var(--line);
}

tbody tr:last-child td {
    border-bottom: 0;
}

pre {
    background: var(--bg);
    border: 1px solid var(--line-soft);
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 0.84rem;
    margin: var(--space-2) 0;
    overflow-x: auto;
    padding: 1rem;
}

code {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.standard-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.form-group {
    display: flex;
    flex-direction: column;
}

fieldset.form-group {
    border: 0;
    min-width: 0;
    padding: 0;
}

legend {
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 0.3rem;
}

label {
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 0.3rem;
}

input[type="text"],
input[type="email"],
input[type="url"],
input[type="number"],
select,
textarea {
    background: var(--bg);
    border: 1px solid var(--line-soft);
    border-radius: 0;
    color: var(--ink);
    font-family: inherit;
    font-size: 0.95rem;
    padding: 0.75rem;
    resize: vertical;
}

input:focus,
select:focus,
textarea:focus {
    border-color: var(--line);
    outline: none;
}

.form-actions {
    margin-top: var(--space-2);
}

.sidebar-box {
    background: var(--bg);
}

.field-help {
    color: var(--muted);
    font-size: 0.88rem;
    margin-bottom: 0;
    margin-top: 0.35rem;
}

.mode-picker {
    display: grid;
    gap: 0.85rem;
    margin-top: 0.35rem;
}

.mode-card {
    cursor: pointer;
    display: block;
    margin-bottom: 0;
}

.mode-card input {
    left: -9999px;
    position: absolute;
}

.mode-card-body {
    background: var(--surface);
    border: 1px solid var(--line-soft);
    display: block;
    padding: 1rem;
    transition:
        border-color 140ms ease,
        background-color 140ms ease;
}

.mode-card:hover .mode-card-body {
    border-color: var(--line);
}

.mode-card input:checked + .mode-card-body {
    background: var(--accent-soft);
    border-color: var(--line);
}

.mode-card-title,
.mode-card-meta,
.mode-card-desc {
    display: block;
}

.mode-card-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.2rem;
}

.mode-card-meta {
    color: var(--accent);
    font-size: 0.82rem;
    font-weight: 600;
    letter-spacing: 0.03em;
    margin-bottom: 0.35rem;
    text-transform: uppercase;
}

.mode-card-desc {
    color: var(--muted);
    font-size: 0.92rem;
    line-height: 1.5;
}

.is-hidden {
    display: none;
}

.site-footer {
    color: var(--muted);
    font-size: 0.9rem;
    margin-bottom: var(--space-5);
    margin-top: var(--space-5);
}

.site-footer .linework-box {
    margin-bottom: 0;
    padding-bottom: 1rem;
    padding-top: 1rem;
}

@media (max-width: 860px) {
    .grid-2,
    .grid-2-asymmetric,
    .calc-grid,
    .faq-grid,
    .step-grid {
        grid-template-columns: 1fr;
    }

    .header-container {
        align-items: flex-start;
        flex-direction: column;
        gap: var(--space-2);
        height: auto;
        padding: var(--space-2) 0;
    }

    .main-nav {
        gap: var(--space-2);
        width: 100%;
    }
}