:root {
    --canvas: #f7f7f4;
    --canvas-soft: #fafaf7;
    --surface-card: #ffffff;
    --surface-strong: #e6e5e0;
    --hairline: #e6e5e0;
    --hairline-soft: #efeee8;
    --hairline-strong: #cfcdc4;
    --ink: #26251e;
    --body: #5a5852;
    --muted: #807d72;
    --muted-soft: #a09c92;
    --primary: #f54e00;
    --primary-active: #d04200;
    --on-primary: #ffffff;
    --semantic-success: #1f8a65;
    --semantic-error: #cf2d56;
    --section: 80px;
    --container: 1200px;
    --font-sans: "Inter", system-ui, "Helvetica Neue", Helvetica, Arial, sans-serif;
    --font-mono: "JetBrains Mono", monospace;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: var(--font-sans);
    font-size: 16px;
    font-weight: 400;
    line-height: 1.5;
    color: var(--body);
    background: var(--canvas);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: var(--ink);
    text-decoration-thickness: 1px;
    text-underline-offset: 3px;
}

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

.container {
    width: min(100% - 32px, var(--container));
    margin-inline: auto;
}

.site-main {
    min-height: 60vh;
}

.top-nav {
    background: var(--canvas);
    border-bottom: 1px solid var(--hairline);
    height: 64px;
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.wordmark {
    font-size: 18px;
    font-weight: 500;
    letter-spacing: -0.02em;
    color: var(--primary);
    text-decoration: none;
}

.nav-menu {
    display: flex;
    gap: 24px;
    align-items: center;
}

.nav-menu a {
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
    color: var(--ink);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: var(--surface-card);
    border: 1px solid var(--hairline-strong);
    border-radius: 8px;
    padding: 8px;
    cursor: pointer;
}

.nav-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--ink);
}

.hero-band {
    padding: var(--section) 0 48px;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
}

.display-mega {
    font-size: clamp(32px, 5vw, 72px);
    font-weight: 400;
    line-height: 1.1;
    letter-spacing: -0.03em;
    color: var(--ink);
    margin: 0 0 20px;
}

.display-lg {
    font-size: clamp(28px, 3vw, 36px);
    font-weight: 400;
    line-height: 1.2;
    letter-spacing: -0.02em;
    color: var(--ink);
    margin: 0 0 16px;
}

.display-md {
    font-size: 26px;
    font-weight: 400;
    line-height: 1.25;
    letter-spacing: -0.012em;
    color: var(--ink);
    margin: 0 0 12px;
}

.display-sm {
    font-size: 22px;
    font-weight: 400;
    line-height: 1.3;
    letter-spacing: -0.005em;
    color: var(--ink);
    margin: 0 0 8px;
}

.title-md {
    font-size: 18px;
    font-weight: 600;
    color: var(--ink);
    margin: 0 0 8px;
}

.caption-uppercase {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    color: var(--muted);
    margin: 0 0 12px;
}

.lead {
    font-size: 16px;
    line-height: 1.5;
    color: var(--body);
    margin: 0 0 24px;
    max-width: 52ch;
}

.badge-pill {
    display: inline-block;
    background: var(--surface-strong);
    color: var(--ink);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    padding: 4px 10px;
    border-radius: 9999px;
    margin-bottom: 16px;
}

.hero-visual {
    border: 1px solid var(--hairline);
    border-radius: 12px;
    overflow: hidden;
    background: var(--surface-card);
}

.hero-visual img {
    width: 100%;
    aspect-ratio: 4/3;
    object-fit: cover;
}

.section-band {
    padding: var(--section) 0;
    border-top: 1px solid var(--hairline-soft);
}

.article-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.feature-card {
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: 12px;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.feature-card img {
    border-radius: 8px;
    aspect-ratio: 16/10;
    object-fit: cover;
    margin: -8px -8px 8px;
    width: calc(100% + 16px);
    max-width: none;
}

.feature-card a.card-link {
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
    color: var(--ink);
    margin-top: auto;
}

.split-band {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: start;
}

.code-block {
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: 12px;
    padding: 20px;
    font-family: var(--font-mono);
    font-size: 13px;
    line-height: 1.5;
    color: var(--ink);
    overflow-x: auto;
}

.fact-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.fact-list li {
    padding: 12px 0;
    border-bottom: 1px solid var(--hairline-soft);
}

.fact-list li:last-child {
    border-bottom: none;
}

.article-layout {
    padding: 48px 0 var(--section);
}

.article-header {
    max-width: 720px;
    margin-bottom: 40px;
}

.article-meta {
    font-size: 13px;
    color: var(--muted);
    margin-bottom: 16px;
}

.article-body {
    max-width: 720px;
}

.article-body h2 {
    font-size: 26px;
    font-weight: 400;
    letter-spacing: -0.012em;
    color: var(--ink);
    margin: 40px 0 16px;
}

.article-body h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--ink);
    margin: 28px 0 12px;
}

.article-body p,
.article-body li {
    margin: 0 0 16px;
}

.article-body code {
    font-family: var(--font-mono);
    font-size: 13px;
    background: var(--surface-card);
    border: 1px solid var(--hairline-soft);
    padding: 2px 6px;
    border-radius: 4px;
    color: var(--ink);
}

.article-body ul,
.article-body ol {
    padding-left: 24px;
    margin: 0 0 20px;
}

.article-figure {
    margin: 32px 0;
    border: 1px solid var(--hairline);
    border-radius: 12px;
    overflow: hidden;
    background: var(--surface-card);
}

.article-figure img {
    width: 100%;
}

.article-figure figcaption {
    font-size: 13px;
    color: var(--muted);
    padding: 12px 16px;
    border-top: 1px solid var(--hairline-soft);
}

.callout {
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: 12px;
    padding: 20px 24px;
    margin: 28px 0;
}

.callout strong {
    color: var(--ink);
}

.spec-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
    margin: 24px 0;
}

.spec-table th,
.spec-table td {
    border: 1px solid var(--hairline);
    padding: 10px 14px;
    text-align: left;
}

.spec-table th {
    background: var(--canvas-soft);
    color: var(--ink);
    font-weight: 600;
}

.page-layout {
    padding: 48px 0 var(--section);
}

.page-layout .article-body {
    max-width: 800px;
}

.contact-form {
    max-width: 520px;
    margin-top: 32px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 6px;
}

.text-input {
    width: 100%;
    height: 44px;
    padding: 12px 16px;
    font-family: var(--font-sans);
    font-size: 16px;
    color: var(--ink);
    background: var(--surface-card);
    border: 1px solid var(--hairline-strong);
    border-radius: 8px;
}

.text-input:focus {
    outline: 2px solid var(--ink);
    outline-offset: 1px;
}

textarea.text-input {
    height: auto;
    min-height: 120px;
    resize: vertical;
}

.button-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 40px;
    padding: 10px 18px;
    font-size: 14px;
    font-weight: 500;
    color: var(--on-primary);
    background: var(--primary);
    border: none;
    border-radius: 8px;
    cursor: pointer;
}

.button-primary:hover {
    background: var(--primary-active);
}

.button-primary:disabled {
    opacity: 0.6;
    cursor: wait;
}

.button-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 40px;
    padding: 10px 18px;
    font-size: 14px;
    font-weight: 500;
    color: var(--ink);
    background: var(--surface-card);
    border: 1px solid var(--hairline-strong);
    border-radius: 8px;
    cursor: pointer;
}

.form-status {
    margin-top: 16px;
    font-size: 14px;
    color: var(--semantic-success);
    min-height: 1.4em;
}

.form-status.error {
    color: var(--semantic-error);
}

.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--surface-card);
    border-top: 1px solid var(--hairline);
    padding: 20px;
    z-index: 200;
    display: none;
}

.cookie-banner.is-visible {
    display: block;
}

.cookie-inner {
    width: min(100% - 32px, var(--container));
    margin-inline: auto;
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    align-items: center;
    justify-content: space-between;
}

.cookie-inner p {
    margin: 0;
    flex: 1 1 280px;
    font-size: 14px;
}

.cookie-actions {
    display: flex;
    gap: 12px;
}

.related-links {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid var(--hairline);
}

.related-links a {
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
    padding: 8px 14px;
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: 8px;
}

.site-footer {
    background: var(--canvas);
    border-top: 1px solid var(--hairline);
    padding: 64px 0 32px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 32px 24px;
}

.footer-col-wide {
    grid-column: 1 / -1;
}

.footer-brand {
    font-size: 16px;
    font-weight: 600;
    color: var(--ink);
    margin: 0 0 8px;
}

.footer-heading {
    font-size: 14px;
    font-weight: 600;
    color: var(--ink);
    margin: 0 0 12px;
}

.footer-link,
.footer-note,
.footer-updated,
.footer-disclaimer {
    display: block;
    font-size: 14px;
    margin: 0 0 8px;
    color: var(--body);
    text-decoration: none;
}

.footer-disclaimer {
    line-height: 1.5;
}

.footer-bottom {
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid var(--hairline-soft);
    font-size: 14px;
    color: var(--muted);
}

@media (max-width: 1024px) {
    .article-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        flex-direction: column;
        background: var(--canvas);
        border-bottom: 1px solid var(--hairline);
        padding: 16px;
        gap: 12px;
    }

    .nav-menu.is-open {
        display: flex;
    }

    .top-nav {
        position: relative;
    }

    .hero-grid,
    .split-band {
        grid-template-columns: 1fr;
    }

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

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