:root {
    --canvas: #f7f7f4;
    --canvas-soft: #fafaf7;
    --surface-card: #ffffff;
    --surface-strong: #e6e5e0;
    --primary: #f54e00;
    --primary-active: #d04200;
    --on-primary: #ffffff;
    --ink: #26251e;
    --body: #5a5852;
    --body-strong: #26251e;
    --muted: #807d72;
    --muted-soft: #a09c92;
    --hairline: #e6e5e0;
    --hairline-soft: #efeee8;
    --hairline-strong: #cfcdc4;
    --timeline-thinking: #dfa88f;
    --timeline-grep: #9fc9a2;
    --timeline-read: #9fbbe0;
    --timeline-edit: #c0a8dd;
    --timeline-done: #c08532;
    --semantic-success: #1f8a65;
    --semantic-error: #cf2d56;
    --rounded-xs: 4px;
    --rounded-sm: 6px;
    --rounded-md: 8px;
    --rounded-lg: 12px;
    --rounded-xl: 16px;
    --rounded-pill: 9999px;
    --spacing-xxs: 4px;
    --spacing-xs: 8px;
    --spacing-sm: 12px;
    --spacing-base: 16px;
    --spacing-md: 20px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-xxl: 48px;
    --spacing-section: 80px;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    background-color: var(--canvas);
    color: var(--body);
    font-family: 'Inter', system-ui, "Helvetica Neue", Helvetica, Arial, sans-serif;
    font-size: 16px;
    font-weight: 400;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

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

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

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

ul {
    list-style: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-base);
}

.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 var(--spacing-base);
    height: 100%;
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

.nav-wordmark {
    font-size: 18px;
    font-weight: 600;
    color: var(--ink);
    letter-spacing: -0.11px;
    flex-shrink: 0;
}

.nav-wordmark:hover {
    color: var(--primary);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    flex: 1;
}

.nav-menu li a {
    font-size: 14px;
    font-weight: 500;
    line-height: 1.4;
    color: var(--ink);
    transition: color 0.15s;
}

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

.nav-hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
    margin-left: auto;
}

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

.hero-band {
    padding: var(--spacing-section) 0;
    background: var(--canvas);
}

.hero-band .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xxl);
    align-items: center;
}

.hero-content h1 {
    font-size: 56px;
    font-weight: 400;
    line-height: 1.1;
    letter-spacing: -1.5px;
    color: var(--ink);
    margin-bottom: var(--spacing-lg);
}

.hero-content .hero-lead {
    font-size: 16px;
    line-height: 1.5;
    color: var(--body);
    margin-bottom: var(--spacing-xl);
    max-width: 440px;
}

.hero-meta {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.badge-pill {
    display: inline-flex;
    align-items: center;
    background: var(--surface-strong);
    color: var(--ink);
    font-size: 11px;
    font-weight: 600;
    line-height: 1.4;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    border-radius: var(--rounded-pill);
    padding: 4px 10px;
}

.hero-image-wrap {
    border-radius: var(--rounded-lg);
    overflow: hidden;
    border: 1px solid var(--hairline);
    background: var(--surface-card);
}

.hero-image-wrap img {
    width: 100%;
    height: 360px;
    object-fit: cover;
}

.section {
    padding: var(--spacing-section) 0;
}

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

.section-title {
    font-size: 36px;
    font-weight: 400;
    line-height: 1.2;
    letter-spacing: -0.72px;
    color: var(--ink);
    margin-bottom: var(--spacing-base);
}

.section-lead {
    font-size: 16px;
    line-height: 1.5;
    color: var(--body);
    max-width: 600px;
    margin-bottom: var(--spacing-xxl);
}

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

.articles-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.article-card {
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: var(--rounded-lg);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.article-card-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.article-card-body {
    padding: var(--spacing-lg);
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.article-card-category {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    color: var(--muted);
}

.article-card-title {
    font-size: 18px;
    font-weight: 600;
    line-height: 1.4;
    color: var(--ink);
}

.article-card-excerpt {
    font-size: 14px;
    line-height: 1.5;
    color: var(--body);
    flex: 1;
}

.article-card-meta {
    font-size: 13px;
    color: var(--muted);
    margin-top: var(--spacing-xs);
}

.article-card-link {
    display: inline-block;
    font-size: 14px;
    font-weight: 500;
    color: var(--primary);
    margin-top: var(--spacing-sm);
}

.facts-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.fact-card {
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: var(--rounded-lg);
    padding: var(--spacing-lg);
}

.fact-card h3 {
    font-size: 22px;
    font-weight: 400;
    letter-spacing: -0.11px;
    color: var(--ink);
    margin-bottom: var(--spacing-xs);
}

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

.intro-band {
    background: var(--surface-card);
    border-top: 1px solid var(--hairline);
    border-bottom: 1px solid var(--hairline);
    padding: var(--spacing-section) 0;
}

.intro-band .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xxl);
    align-items: start;
}

.intro-body {
    font-size: 16px;
    line-height: 1.6;
    color: var(--body);
}

.intro-body p + p {
    margin-top: var(--spacing-base);
}

.intro-image {
    border-radius: var(--rounded-lg);
    overflow: hidden;
    border: 1px solid var(--hairline);
}

.intro-image img {
    width: 100%;
    height: 320px;
    object-fit: cover;
}

.article-layout {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: var(--spacing-xxl);
    align-items: start;
    padding: var(--spacing-section) 0;
}

.article-main h1 {
    font-size: 48px;
    font-weight: 400;
    line-height: 1.1;
    letter-spacing: -1.2px;
    color: var(--ink);
    margin-bottom: var(--spacing-lg);
}

.article-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-base);
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--hairline);
    flex-wrap: wrap;
}

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

.article-hero-img {
    width: 100%;
    border-radius: var(--rounded-lg);
    overflow: hidden;
    border: 1px solid var(--hairline);
    margin-bottom: var(--spacing-xxl);
}

.article-hero-img img {
    width: 100%;
    max-height: 460px;
    object-fit: cover;
}

.article-body {
    font-size: 16px;
    line-height: 1.6;
    color: var(--body);
}

.article-body h2 {
    font-size: 26px;
    font-weight: 400;
    letter-spacing: -0.325px;
    color: var(--ink);
    margin: var(--spacing-xxl) 0 var(--spacing-base);
}

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

.article-body p {
    margin-bottom: var(--spacing-base);
}

.article-body ul, .article-body ol {
    padding-left: var(--spacing-lg);
    margin-bottom: var(--spacing-base);
    list-style: disc;
}

.article-body ol {
    list-style: decimal;
}

.article-body li {
    margin-bottom: var(--spacing-xs);
    font-size: 16px;
    line-height: 1.6;
}

.article-body a {
    color: var(--primary);
    text-decoration: underline;
    text-underline-offset: 2px;
}

.article-body .callout {
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-left: 3px solid var(--timeline-done);
    border-radius: var(--rounded-md);
    padding: var(--spacing-base) var(--spacing-lg);
    margin: var(--spacing-lg) 0;
    font-size: 15px;
    color: var(--body-strong);
}

.article-body .inline-img {
    border-radius: var(--rounded-lg);
    overflow: hidden;
    border: 1px solid var(--hairline);
    margin: var(--spacing-xl) 0;
}

.article-body .inline-img img {
    width: 100%;
    max-height: 380px;
    object-fit: cover;
}

.article-body .inline-img figcaption {
    font-size: 13px;
    color: var(--muted);
    padding: var(--spacing-sm) var(--spacing-base);
    background: var(--canvas-soft);
    border-top: 1px solid var(--hairline-soft);
}

.code-block {
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: var(--rounded-lg);
    padding: var(--spacing-md);
    font-family: 'JetBrains Mono', 'Courier New', monospace;
    font-size: 13px;
    line-height: 1.5;
    color: var(--ink);
    overflow-x: auto;
    margin: var(--spacing-base) 0;
}

.article-sidebar {
    position: sticky;
    top: 84px;
}

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

.sidebar-card h3 {
    font-size: 14px;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: var(--spacing-sm);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--hairline);
}

.sidebar-card ul {
    list-style: none;
    padding: 0;
}

.sidebar-card ul li {
    padding: var(--spacing-xxs) 0;
    border-bottom: 1px solid var(--hairline-soft);
}

.sidebar-card ul li:last-child {
    border-bottom: none;
}

.sidebar-card ul li a {
    font-size: 14px;
    color: var(--body);
    line-height: 1.5;
}

.sidebar-card ul li a:hover {
    color: var(--primary);
}

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

.page-header {
    padding: var(--spacing-xxl) 0 var(--spacing-xl);
    border-bottom: 1px solid var(--hairline);
    margin-bottom: var(--spacing-section);
}

.page-header h1 {
    font-size: 36px;
    font-weight: 400;
    letter-spacing: -0.72px;
    color: var(--ink);
    margin-bottom: var(--spacing-sm);
}

.page-header .page-lead {
    font-size: 16px;
    color: var(--muted);
}

.page-body {
    max-width: 800px;
    font-size: 16px;
    line-height: 1.6;
    color: var(--body);
    padding-bottom: var(--spacing-section);
}

.page-body h2 {
    font-size: 22px;
    font-weight: 400;
    letter-spacing: -0.11px;
    color: var(--ink);
    margin: var(--spacing-xl) 0 var(--spacing-sm);
}

.page-body h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--ink);
    margin: var(--spacing-lg) 0 var(--spacing-xs);
}

.page-body p {
    margin-bottom: var(--spacing-base);
}

.page-body ul {
    padding-left: var(--spacing-lg);
    list-style: disc;
    margin-bottom: var(--spacing-base);
}

.page-body li {
    margin-bottom: var(--spacing-xs);
}

.contact-form {
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: var(--rounded-lg);
    padding: var(--spacing-xl);
    max-width: 560px;
    margin-top: var(--spacing-xl);
}

.form-group {
    margin-bottom: var(--spacing-base);
}

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

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

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

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

.btn-primary {
    background: var(--primary);
    color: var(--on-primary);
    border: none;
    border-radius: var(--rounded-md);
    padding: 10px 18px;
    font-size: 14px;
    font-weight: 500;
    height: 40px;
    cursor: pointer;
    transition: background 0.15s;
}

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

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

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

.form-message {
    display: none;
    padding: var(--spacing-sm) var(--spacing-base);
    border-radius: var(--rounded-md);
    font-size: 14px;
    margin-top: var(--spacing-sm);
}

.form-message.success {
    background: #edf7f3;
    color: var(--semantic-success);
    border: 1px solid #b8e0d2;
}

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

.footer-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
    gap: var(--spacing-xl);
}

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

.footer-tagline {
    font-size: 14px;
    color: var(--muted);
    line-height: 1.5;
}

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

.footer-col ul {
    list-style: none;
    padding: 0;
}

.footer-col ul li {
    margin-bottom: var(--spacing-xs);
}

.footer-col ul li a,
.footer-col ul li span {
    font-size: 14px;
    color: var(--body);
    line-height: 1.5;
}

.footer-col ul li a:hover {
    color: var(--ink);
}

.footer-bottom {
    max-width: 1200px;
    margin: var(--spacing-xl) auto 0;
    padding-top: var(--spacing-base);
    border-top: 1px solid var(--hairline);
    font-size: 13px;
    color: var(--muted);
}

.footer-bottom a {
    color: var(--muted);
}

.footer-bottom a:hover {
    color: var(--ink);
}

.cookie-banner {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--ink);
    color: var(--canvas);
    z-index: 1000;
    padding: var(--spacing-base) var(--spacing-lg);
}

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

.cookie-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-xl);
    flex-wrap: wrap;
}

.cookie-inner p {
    font-size: 14px;
    color: var(--canvas);
    flex: 1;
}

.cookie-inner p a {
    color: var(--canvas);
    text-decoration: underline;
}

.cookie-actions {
    display: flex;
    gap: var(--spacing-sm);
    flex-shrink: 0;
}

.cookie-actions .btn-primary {
    background: var(--primary);
    color: var(--on-primary);
}

.cookie-actions .btn-secondary {
    background: transparent;
    color: var(--canvas);
    border-color: var(--muted);
}

@media (max-width: 1024px) {
    .hero-band .container {
        grid-template-columns: 1fr;
    }
    .hero-content h1 {
        font-size: 44px;
    }
    .articles-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .facts-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .intro-band .container {
        grid-template-columns: 1fr;
    }
    .article-layout {
        grid-template-columns: 1fr;
    }
    .article-sidebar {
        position: static;
    }
    .footer-inner {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-xl);
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
        flex-direction: column;
        align-items: flex-start;
        gap: 0;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: var(--canvas);
        border-bottom: 1px solid var(--hairline);
        padding: var(--spacing-base);
    }
    .nav-menu.open {
        display: flex;
    }
    .nav-menu li {
        width: 100%;
        border-bottom: 1px solid var(--hairline-soft);
    }
    .nav-menu li a {
        display: block;
        padding: var(--spacing-sm) 0;
    }
    .nav-hamburger {
        display: flex;
    }
    .top-nav {
        position: relative;
    }
}

@media (max-width: 640px) {
    .hero-content h1 {
        font-size: 32px;
        letter-spacing: -0.8px;
    }
    .section-title {
        font-size: 26px;
    }
    .articles-grid {
        grid-template-columns: 1fr;
    }
    .facts-grid {
        grid-template-columns: 1fr;
    }
    .article-main h1 {
        font-size: 32px;
        letter-spacing: -0.8px;
    }
    .footer-inner {
        grid-template-columns: 1fr;
    }
    .cookie-inner {
        flex-direction: column;
        align-items: flex-start;
    }
}