:root {
    --canvas: #f7f7f4;
    --canvas-soft: #fafaf7;
    --surface-card: #ffffff;
    --surface-strong: #e6e5e0;
    --primary: #f54e00;
    --primary-active: #d04200;
    --ink: #26251e;
    --body: #5a5852;
    --body-strong: #26251e;
    --muted: #807d72;
    --muted-soft: #a09c92;
    --on-primary: #ffffff;
    --hairline: #e6e5e0;
    --hairline-soft: #efeee8;
    --hairline-strong: #cfcdc4;
    --semantic-success: #1f8a65;
    --semantic-error: #cf2d56;
    --font-sans: 'Inter', system-ui, 'Helvetica Neue', Helvetica, Arial, sans-serif;
    --font-mono: 'JetBrains Mono', 'Courier New', monospace;
    --r-xs: 4px;
    --r-sm: 6px;
    --r-md: 8px;
    --r-lg: 12px;
    --r-xl: 16px;
    --r-pill: 9999px;
}

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

html { scroll-behavior: smooth; }

body {
    font-family: var(--font-sans);
    background: var(--canvas);
    color: var(--body);
    font-size: 16px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
a:hover { color: var(--ink); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

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

.nav-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-wordmark {
    font-size: 18px;
    font-weight: 600;
    color: var(--ink);
    letter-spacing: -0.3px;
    text-decoration: none;
}

.nav-menu {
    display: flex;
    gap: 32px;
    align-items: center;
}

.nav-menu a {
    font-size: 14px;
    font-weight: 500;
    color: var(--body);
    text-decoration: none;
    transition: color 0.15s;
}

.nav-menu a:hover { color: var(--ink); }

.nav-hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.nav-hamburger span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--ink);
    border-radius: 2px;
    transition: transform 0.2s, opacity 0.2s;
}

.hero-band {
    padding: 80px 0;
    background: var(--canvas);
    border-bottom: 1px solid var(--hairline-soft);
}

.hero-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.hero-label {
    display: inline-block;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    color: var(--muted);
    background: var(--surface-strong);
    padding: 4px 10px;
    border-radius: var(--r-pill);
    margin-bottom: 24px;
}

.hero-band h1 {
    font-size: 72px;
    font-weight: 400;
    line-height: 1.1;
    letter-spacing: -2.16px;
    color: var(--ink);
    max-width: 800px;
    margin-bottom: 24px;
}

.hero-sub {
    font-size: 16px;
    color: var(--body);
    max-width: 560px;
    line-height: 1.5;
    margin-bottom: 48px;
}

.hero-image-wrap {
    position: relative;
    border-radius: var(--r-lg);
    overflow: hidden;
    border: 1px solid var(--hairline);
    background: var(--surface-card);
    max-height: 480px;
}

.hero-image-wrap img {
    width: 100%;
    height: 480px;
    object-fit: cover;
}

.hero-image-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 16px 20px;
    background: linear-gradient(to top, rgba(38,37,30,0.72), transparent);
    color: rgba(247,247,244,0.88);
    font-size: 13px;
    line-height: 1.4;
}

.section { padding: 80px 0; }

.section-label {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 16px;
    display: block;
}

h2 {
    font-size: 36px;
    font-weight: 400;
    letter-spacing: -0.72px;
    color: var(--ink);
    line-height: 1.2;
}

h3 {
    font-size: 26px;
    font-weight: 400;
    letter-spacing: -0.325px;
    color: var(--ink);
    line-height: 1.25;
}

h4 {
    font-size: 22px;
    font-weight: 400;
    letter-spacing: -0.11px;
    color: var(--ink);
    line-height: 1.3;
}

.section-head {
    margin-bottom: 48px;
}

.section-head h2 { margin-bottom: 16px; }
.section-head p { font-size: 16px; color: var(--body); max-width: 600px; }

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

.card-grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.feature-card {
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: var(--r-lg);
    padding: 24px;
    transition: border-color 0.15s;
}

.feature-card:hover { border-color: var(--hairline-strong); }

.feature-card-img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: var(--r-md);
    margin-bottom: 20px;
}

.feature-card-label {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 8px;
    display: block;
}

.feature-card h3 {
    font-size: 18px;
    font-weight: 600;
    letter-spacing: 0;
    color: var(--ink);
    margin-bottom: 12px;
    line-height: 1.4;
}

.feature-card p {
    font-size: 14px;
    color: var(--body);
    line-height: 1.5;
    margin-bottom: 16px;
}

.card-meta {
    font-size: 13px;
    color: var(--muted);
    border-top: 1px solid var(--hairline-soft);
    padding-top: 12px;
    margin-top: 12px;
}

.article-link {
    display: inline-block;
    font-size: 14px;
    font-weight: 500;
    color: var(--ink);
    border-bottom: 1px solid var(--hairline-strong);
    padding-bottom: 2px;
    transition: border-color 0.15s;
    text-decoration: none;
}

.article-link:hover { border-color: var(--ink); }

.divider {
    border: none;
    border-top: 1px solid var(--hairline);
    margin: 0;
}

.body-section {
    padding: 80px 0;
    border-top: 1px solid var(--hairline);
}

.body-section.bg-soft { background: var(--canvas-soft); }

.prose {
    max-width: 720px;
}

.prose h2 { margin-bottom: 20px; margin-top: 48px; }
.prose h2:first-child { margin-top: 0; }
.prose h3 { margin-bottom: 16px; margin-top: 36px; }
.prose p { margin-bottom: 20px; color: var(--body); line-height: 1.5; }
.prose ul { list-style: disc; padding-left: 20px; margin-bottom: 20px; }
.prose ul li { margin-bottom: 8px; color: var(--body); }
.prose a { color: var(--ink); border-bottom: 1px solid var(--hairline-strong); }
.prose a:hover { border-color: var(--ink); }

.article-hero {
    padding: 64px 0 0;
    background: var(--canvas);
    border-bottom: 1px solid var(--hairline-soft);
}

.article-hero-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.breadcrumb {
    font-size: 13px;
    color: var(--muted);
    margin-bottom: 24px;
    display: flex;
    gap: 8px;
    align-items: center;
}

.breadcrumb a { color: var(--muted); text-decoration: none; }
.breadcrumb a:hover { color: var(--ink); }
.breadcrumb-sep { color: var(--hairline-strong); }

.article-hero h1 {
    font-size: 56px;
    font-weight: 400;
    letter-spacing: -1.5px;
    color: var(--ink);
    line-height: 1.1;
    max-width: 800px;
    margin-bottom: 20px;
}

.article-meta {
    display: flex;
    gap: 20px;
    font-size: 13px;
    color: var(--muted);
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.article-meta-item { display: flex; gap: 4px; align-items: center; }

.article-body-wrap {
    display: grid;
    grid-template-columns: 1fr 280px;
    gap: 64px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 64px 24px;
}

.article-body { min-width: 0; }

.article-sidebar {}

.sidebar-card {
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: var(--r-lg);
    padding: 24px;
    margin-bottom: 24px;
}

.sidebar-card h4 {
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 16px;
}

.sidebar-card ul li {
    padding: 8px 0;
    border-bottom: 1px solid var(--hairline-soft);
    font-size: 14px;
}

.sidebar-card ul li:last-child { border-bottom: none; }
.sidebar-card ul li a { color: var(--body); text-decoration: none; }
.sidebar-card ul li a:hover { color: var(--ink); }

.fact-box {
    background: var(--canvas-soft);
    border: 1px solid var(--hairline);
    border-radius: var(--r-lg);
    padding: 24px;
    margin: 32px 0;
}

.fact-box h4 {
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 12px;
}

.fact-box p { font-size: 15px; color: var(--body); margin-bottom: 0; }

.figure-block {
    margin: 32px 0;
    border-radius: var(--r-lg);
    overflow: hidden;
    border: 1px solid var(--hairline);
}

.figure-block img {
    width: 100%;
    height: 360px;
    object-fit: cover;
}

.figure-caption {
    padding: 12px 16px;
    font-size: 13px;
    color: var(--muted);
    background: var(--surface-card);
    border-top: 1px solid var(--hairline-soft);
    line-height: 1.4;
}

.two-col-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin: 32px 0;
}

.two-col-grid .figure-block { margin: 0; }

.page-hero {
    padding: 64px 0 48px;
    border-bottom: 1px solid var(--hairline);
    background: var(--canvas);
}

.page-hero h1 {
    font-size: 52px;
    font-weight: 400;
    letter-spacing: -1.2px;
    color: var(--ink);
    line-height: 1.15;
    margin-bottom: 16px;
}

.page-hero p {
    font-size: 16px;
    color: var(--body);
    max-width: 560px;
}

.page-body {
    max-width: 800px;
    margin: 0 auto;
    padding: 64px 24px;
}

.contact-form {
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: var(--r-lg);
    padding: 40px;
    margin-top: 32px;
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--ink);
    margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    background: var(--surface-card);
    border: 1px solid var(--hairline-strong);
    border-radius: var(--r-md);
    padding: 12px 16px;
    height: 44px;
    font-family: var(--font-sans);
    font-size: 16px;
    color: var(--ink);
    transition: border-color 0.15s;
    outline: none;
}

.form-group textarea {
    height: 120px;
    resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--ink);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--muted-soft);
}

.btn-primary {
    background: var(--primary);
    color: var(--on-primary);
    font-family: var(--font-sans);
    font-size: 14px;
    font-weight: 500;
    padding: 10px 18px;
    height: 40px;
    border-radius: var(--r-md);
    border: none;
    cursor: pointer;
    transition: background 0.15s;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

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

.btn-secondary {
    background: var(--surface-card);
    color: var(--ink);
    font-family: var(--font-sans);
    font-size: 14px;
    font-weight: 500;
    padding: 10px 18px;
    height: 40px;
    border-radius: var(--r-md);
    border: 1px solid var(--hairline-strong);
    cursor: pointer;
    transition: border-color 0.15s;
}

.btn-secondary:hover { border-color: var(--ink); }

.form-status {
    display: none;
    padding: 16px 20px;
    border-radius: var(--r-md);
    font-size: 14px;
    margin-top: 16px;
}

.form-status.success {
    background: rgba(31,138,101,0.08);
    border: 1px solid rgba(31,138,101,0.24);
    color: var(--semantic-success);
}

.form-status.loading {
    background: var(--canvas-soft);
    border: 1px solid var(--hairline);
    color: var(--muted);
}

.site-footer {
    background: var(--canvas);
    border-top: 1px solid var(--hairline);
    padding: 64px 0 48px;
}

.footer-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
}

.footer-wordmark {
    font-size: 16px;
    font-weight: 600;
    color: var(--ink);
    display: block;
    margin-bottom: 8px;
}

.footer-tagline {
    font-size: 14px;
    color: var(--body);
    margin-bottom: 16px;
    line-height: 1.4;
}

.footer-copy {
    font-size: 13px;
    color: var(--muted);
}

.footer-heading {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    color: var(--muted);
    display: block;
    margin-bottom: 16px;
}

.footer-col ul { display: flex; flex-direction: column; gap: 10px; }
.footer-col ul li a { font-size: 14px; color: var(--body); text-decoration: none; }
.footer-col ul li a:hover { color: var(--ink); }

.footer-disclaimer {
    grid-column: 1 / -1;
    border-top: 1px solid var(--hairline-soft);
    padding-top: 32px;
    margin-top: 16px;
}

.footer-disclaimer p {
    font-size: 13px;
    color: var(--muted);
    max-width: 680px;
    line-height: 1.5;
}

.footer-disclaimer a { color: var(--muted); border-bottom: 1px solid var(--hairline-strong); }

.cookie-banner {
    display: none;
    position: fixed;
    bottom: 24px;
    left: 24px;
    right: 24px;
    max-width: 480px;
    background: var(--surface-card);
    border: 1px solid var(--hairline-strong);
    border-radius: var(--r-lg);
    padding: 24px;
    z-index: 1000;
    box-shadow: 0 4px 24px rgba(38,37,30,0.08);
}

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

.cookie-inner p {
    font-size: 14px;
    color: var(--body);
    margin-bottom: 8px;
    line-height: 1.5;
}

.cookie-inner p strong { color: var(--ink); }

.cookie-actions {
    display: flex;
    gap: 12px;
    margin-top: 16px;
}

.update-date {
    font-size: 13px;
    color: var(--muted);
    margin-bottom: 32px;
    display: block;
}

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

.highlight-band {
    background: var(--canvas-soft);
    border-top: 1px solid var(--hairline-soft);
    border-bottom: 1px solid var(--hairline-soft);
    padding: 64px 0;
}

.ref-list {
    margin-top: 48px;
    border-top: 1px solid var(--hairline);
    padding-top: 32px;
}

.ref-list h4 {
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 16px;
}

.ref-list ol {
    list-style: decimal;
    padding-left: 20px;
}

.ref-list ol li {
    font-size: 13px;
    color: var(--muted);
    line-height: 1.5;
    margin-bottom: 8px;
}

.ref-list ol li a {
    color: var(--body);
    text-decoration: none;
    border-bottom: 1px solid var(--hairline);
}

.ref-list ol li a:hover { border-color: var(--ink); color: var(--ink); }

@media (max-width: 1024px) {
    .article-body-wrap {
        grid-template-columns: 1fr;
        gap: 48px;
    }
    .footer-inner {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }
    .footer-disclaimer { grid-column: 1 / -1; }
    .card-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: var(--canvas);
        border-bottom: 1px solid var(--hairline);
        flex-direction: column;
        padding: 20px 24px;
        gap: 20px;
    }
    .nav-menu.open { display: flex; }
    .nav-hamburger { display: flex; }
    .top-nav { position: relative; }
    .hero-band h1 { font-size: 36px; letter-spacing: -0.72px; }
    .article-hero h1 { font-size: 32px; letter-spacing: -0.5px; }
    .page-hero h1 { font-size: 32px; }
    h2 { font-size: 26px; letter-spacing: -0.325px; }
    .card-grid { grid-template-columns: 1fr; }
    .card-grid-2 { grid-template-columns: 1fr; }
    .two-col-grid { grid-template-columns: 1fr; }
    .footer-inner { grid-template-columns: 1fr; gap: 24px; }
    .contact-form { padding: 24px; }
    .cookie-banner { left: 12px; right: 12px; bottom: 12px; }
}

@media (max-width: 640px) {
    .container { padding: 0 16px; }
    .section { padding: 48px 0; }
    .hero-band { padding: 48px 0; }
    .hero-band h1 { font-size: 32px; }
    .hero-image-wrap img { height: 240px; }
}