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

:root {
    --color-primary: #181d26;
    --color-primary-active: #0d1218;
    --color-canvas: #ffffff;
    --color-surface-soft: #f8fafc;
    --color-surface-strong: #e0e2e6;
    --color-surface-dark: #181d26;
    --color-surface-dark-elevated: #1d1f25;
    --color-hairline: #dddddd;
    --color-ink: #181d26;
    --color-body: #333840;
    --color-muted: #41454d;
    --color-on-primary: #ffffff;
    --color-link: #1b61c9;
    --color-link-active: #1a3866;
    --color-signature-coral: #aa2d00;
    --color-signature-forest: #0a2e0e;
    --color-signature-cream: #f5e9d4;
    --color-signature-peach: #fcab79;
    --color-signature-mint: #a8d8c4;
    --color-signature-yellow: #f4d35e;
    --color-signature-mustard: #d9a441;
    --rounded-xs: 2px;
    --rounded-sm: 6px;
    --rounded-md: 10px;
    --rounded-lg: 12px;
    --rounded-full: 9999px;
    --spacing-xxs: 4px;
    --spacing-xs: 8px;
    --spacing-sm: 12px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-xxl: 48px;
    --spacing-section: 96px;
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

html { font-size: 16px; scroll-behavior: smooth; }
body { font-family: var(--font-main); font-size: 14px; font-weight: 400; line-height: 1.6; color: var(--color-body); background: var(--color-canvas); }

a { color: var(--color-link); text-decoration: none; }
a:hover { color: var(--color-link-active); }
img { max-width: 100%; height: auto; display: block; }

.container { max-width: 1280px; margin: 0 auto; padding: 0 var(--spacing-xxl); }
@media (max-width: 767px) { .container { padding: 0 var(--spacing-md); } }

/* TOP NAV */
.site-nav { position: sticky; top: 0; z-index: 100; background: var(--color-canvas); height: 64px; border-bottom: 1px solid var(--color-hairline); }
.site-nav .container { display: flex; align-items: center; height: 100%; gap: var(--spacing-xl); }
.nav-brand { font-size: 18px; font-weight: 500; color: var(--color-ink); text-decoration: none; letter-spacing: -0.3px; flex-shrink: 0; }
.nav-brand span { color: var(--color-signature-coral); }
.nav-links { display: flex; align-items: center; gap: var(--spacing-lg); list-style: none; flex: 1; }
.nav-links a { font-size: 14px; font-weight: 400; color: var(--color-body); text-decoration: none; transition: color .15s; }
.nav-links a:hover { color: var(--color-ink); }
.nav-right { display: flex; align-items: center; gap: var(--spacing-sm); margin-left: auto; }
.btn-primary { display: inline-flex; align-items: center; justify-content: center; background: var(--color-primary); color: var(--color-on-primary); font-size: 14px; font-weight: 500; padding: 10px 20px; border-radius: var(--rounded-lg); text-decoration: none; border: none; cursor: pointer; transition: background .15s; }
.btn-primary:hover { background: var(--color-primary-active); color: var(--color-on-primary); }
.btn-secondary { display: inline-flex; align-items: center; justify-content: center; background: var(--color-canvas); color: var(--color-ink); font-size: 14px; font-weight: 500; padding: 10px 20px; border-radius: var(--rounded-lg); border: 1px solid var(--color-hairline); text-decoration: none; cursor: pointer; transition: border-color .15s; }
.btn-secondary:hover { border-color: #aaa; color: var(--color-ink); }
.nav-hamburger { display: none; background: none; border: none; cursor: pointer; padding: var(--spacing-xs); flex-direction: column; gap: 5px; }
.nav-hamburger span { display: block; width: 22px; height: 2px; background: var(--color-ink); border-radius: 2px; }

/* HERO */
.hero-band { padding: var(--spacing-section) 0; background: var(--color-canvas); }
.hero-band .container { display: grid; grid-template-columns: 1fr 1fr; gap: var(--spacing-xxl); align-items: center; }
.hero-label { font-size: 12px; font-weight: 500; letter-spacing: 1.2px; text-transform: uppercase; color: var(--color-muted); margin-bottom: var(--spacing-sm); }
.hero-band h1 { font-size: 40px; font-weight: 400; line-height: 1.2; color: var(--color-ink); margin-bottom: var(--spacing-lg); }
.hero-band p { font-size: 16px; font-weight: 400; line-height: 1.6; color: var(--color-body); margin-bottom: var(--spacing-xl); max-width: 480px; }
.hero-actions { display: flex; gap: var(--spacing-sm); flex-wrap: wrap; }
.hero-image { border-radius: var(--rounded-md); overflow: hidden; }
.hero-image img { width: 100%; height: 340px; object-fit: cover; border-radius: var(--rounded-md); }

/* SECTIONS */
.section { padding: var(--spacing-section) 0; }
.section-label { font-size: 12px; font-weight: 500; letter-spacing: 1.2px; text-transform: uppercase; color: var(--color-muted); margin-bottom: var(--spacing-sm); }
.section-title { font-size: 32px; font-weight: 400; line-height: 1.2; color: var(--color-ink); margin-bottom: var(--spacing-md); }
.section-sub { font-size: 16px; color: var(--color-body); max-width: 560px; line-height: 1.6; }

/* ARTICLE CARDS */
.articles-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--spacing-lg); margin-top: var(--spacing-xxl); }
.article-card { background: var(--color-canvas); border-radius: var(--rounded-md); overflow: hidden; border: 1px solid var(--color-hairline); transition: border-color .15s; }
.article-card:hover { border-color: #bbb; }
.article-card-img { aspect-ratio: 16/9; overflow: hidden; }
.article-card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .3s; }
.article-card:hover .article-card-img img { transform: scale(1.03); }
.article-card-body { padding: var(--spacing-md); }
.article-card-tag { display: inline-block; font-size: 11px; font-weight: 500; letter-spacing: 0.8px; text-transform: uppercase; color: var(--color-muted); margin-bottom: var(--spacing-xs); }
.article-card-title { font-size: 16px; font-weight: 500; line-height: 1.4; color: var(--color-ink); margin-bottom: var(--spacing-xs); }
.article-card-title a { color: inherit; text-decoration: none; }
.article-card-title a:hover { color: var(--color-link); }
.article-card-meta { font-size: 13px; color: var(--color-muted); }

/* SIGNATURE CORAL CARD */
.signature-coral { background: var(--color-signature-coral); border-radius: var(--rounded-lg); padding: var(--spacing-xxl); color: var(--color-on-primary); margin: 0 0 var(--spacing-xl); }
.signature-coral h2 { font-size: 32px; font-weight: 400; line-height: 1.2; color: #fff; margin-bottom: var(--spacing-md); }
.signature-coral p { font-size: 14px; line-height: 1.6; color: rgba(255,255,255,0.85); margin-bottom: var(--spacing-xl); max-width: 560px; }

/* SIGNATURE FOREST CARD */
.signature-forest { background: var(--color-signature-forest); border-radius: var(--rounded-lg); padding: var(--spacing-xxl); color: var(--color-on-primary); }
.signature-forest h2 { font-size: 32px; font-weight: 400; line-height: 1.2; color: #fff; margin-bottom: var(--spacing-md); }
.signature-forest p { font-size: 14px; line-height: 1.6; color: rgba(255,255,255,0.8); margin-bottom: var(--spacing-xl); max-width: 560px; }

/* SIGNATURE TWO-COL BAND */
.signature-duo { display: grid; grid-template-columns: 1fr 1fr; gap: var(--spacing-lg); }

/* CREAM CALLOUT */
.cream-callout { background: var(--color-signature-cream); border-radius: var(--rounded-md); padding: var(--spacing-xxl); }
.cream-callout .section-title { color: var(--color-ink); }

/* DARK CTA CARD */
.dark-cta { background: var(--color-surface-dark); border-radius: var(--rounded-lg); padding: var(--spacing-xxl); text-align: center; }
.dark-cta h2 { font-size: 32px; font-weight: 400; color: #fff; margin-bottom: var(--spacing-md); }
.dark-cta p { font-size: 14px; color: rgba(255,255,255,0.75); margin-bottom: var(--spacing-xl); }
.btn-on-dark { display: inline-flex; align-items: center; justify-content: center; background: var(--color-canvas); color: var(--color-ink); font-size: 14px; font-weight: 500; padding: 12px 24px; border-radius: var(--rounded-lg); text-decoration: none; }
.btn-on-dark:hover { color: var(--color-link); }

/* CTA BAND LIGHT */
.cta-band-light { background: var(--color-surface-strong); border-radius: var(--rounded-lg); padding: var(--spacing-xxl); display: flex; align-items: center; justify-content: space-between; gap: var(--spacing-xl); }
.cta-band-light h2 { font-size: 24px; font-weight: 400; color: var(--color-ink); }
.cta-band-light p { font-size: 14px; color: var(--color-body); margin-top: var(--spacing-xs); }

/* DEMO GRID CARDS */
.demo-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--spacing-lg); margin-top: var(--spacing-xxl); }
.demo-card { border-radius: var(--rounded-md); padding: var(--spacing-lg); overflow: hidden; }
.demo-card-peach { background: var(--color-signature-peach); }
.demo-card-mint { background: var(--color-signature-mint); }
.demo-card-yellow { background: var(--color-signature-yellow); }
.demo-card-mustard { background: var(--color-signature-mustard); }
.demo-card h3 { font-size: 16px; font-weight: 500; color: var(--color-ink); margin-bottom: var(--spacing-xs); }
.demo-card p { font-size: 13px; color: var(--color-body); line-height: 1.5; }
.demo-card-img { border-radius: var(--rounded-sm); overflow: hidden; margin-bottom: var(--spacing-md); }
.demo-card-img img { width: 100%; height: 160px; object-fit: cover; }

/* ARTICLE PAGE */
.article-hero { padding: var(--spacing-section) 0 var(--spacing-xl); background: var(--color-canvas); }
.article-hero .breadcrumb { font-size: 13px; color: var(--color-muted); margin-bottom: var(--spacing-md); }
.article-hero .breadcrumb a { color: var(--color-muted); text-decoration: none; }
.article-hero .breadcrumb a:hover { color: var(--color-link); }
.article-hero h1 { font-size: 40px; font-weight: 400; line-height: 1.2; color: var(--color-ink); max-width: 760px; margin-bottom: var(--spacing-md); }
.article-meta { font-size: 13px; color: var(--color-muted); margin-bottom: var(--spacing-xl); }
.article-feature-img { width: 100%; max-height: 420px; object-fit: cover; border-radius: var(--rounded-md); margin-bottom: var(--spacing-section); }

.article-content { max-width: 760px; }
.article-content h2 { font-size: 24px; font-weight: 400; color: var(--color-ink); margin: var(--spacing-xxl) 0 var(--spacing-md); letter-spacing: 0.12px; }
.article-content h3 { font-size: 18px; font-weight: 500; color: var(--color-ink); margin: var(--spacing-xl) 0 var(--spacing-sm); }
.article-content p { font-size: 14px; line-height: 1.75; color: var(--color-body); margin-bottom: var(--spacing-md); }
.article-content ul, .article-content ol { margin: var(--spacing-md) 0 var(--spacing-md) var(--spacing-xl); }
.article-content li { font-size: 14px; line-height: 1.75; color: var(--color-body); margin-bottom: var(--spacing-xs); }
.article-content a { color: var(--color-link); }
.article-content a:hover { color: var(--color-link-active); }
.article-content .callout { background: var(--color-signature-cream); border-radius: var(--rounded-md); padding: var(--spacing-lg); margin: var(--spacing-xl) 0; }
.article-content .callout p { margin: 0; }

.article-layout { display: grid; grid-template-columns: 1fr 280px; gap: var(--spacing-xxl); align-items: start; padding-bottom: var(--spacing-section); }
.article-sidebar { position: sticky; top: 80px; }
.sidebar-card { background: var(--color-surface-soft); border-radius: var(--rounded-md); padding: var(--spacing-xl); margin-bottom: var(--spacing-lg); }
.sidebar-card h4 { font-size: 14px; font-weight: 500; color: var(--color-ink); margin-bottom: var(--spacing-md); }
.sidebar-card ul { list-style: none; }
.sidebar-card ul li { margin-bottom: var(--spacing-xs); }
.sidebar-card ul li a { font-size: 13px; color: var(--color-body); text-decoration: none; }
.sidebar-card ul li a:hover { color: var(--color-link); }
.toc-list { list-style: none; }
.toc-list li { margin-bottom: var(--spacing-xs); padding-left: var(--spacing-sm); border-left: 2px solid var(--color-hairline); }
.toc-list li a { font-size: 13px; color: var(--color-body); text-decoration: none; }
.toc-list li a:hover { color: var(--color-link); }

/* PAGES */
.page-hero { padding: var(--spacing-section) 0 var(--spacing-xl); }
.page-hero h1 { font-size: 40px; font-weight: 400; color: var(--color-ink); margin-bottom: var(--spacing-md); }
.page-hero p { font-size: 16px; color: var(--color-body); max-width: 600px; }
.page-content { max-width: 760px; padding-bottom: var(--spacing-section); }
.page-content h2 { font-size: 24px; font-weight: 400; color: var(--color-ink); margin: var(--spacing-xxl) 0 var(--spacing-md); }
.page-content h3 { font-size: 18px; font-weight: 500; color: var(--color-ink); margin: var(--spacing-xl) 0 var(--spacing-sm); }
.page-content p { font-size: 14px; line-height: 1.75; color: var(--color-body); margin-bottom: var(--spacing-md); }
.page-content ul, .page-content ol { margin: var(--spacing-md) 0 var(--spacing-md) var(--spacing-xl); }
.page-content li { font-size: 14px; line-height: 1.75; color: var(--color-body); margin-bottom: var(--spacing-xs); }
.page-content a { color: var(--color-link); }

/* CONTACT FORM */
.contact-form { background: var(--color-surface-soft); border-radius: var(--rounded-md); padding: var(--spacing-xxl); max-width: 560px; }
.contact-form h3 { font-size: 20px; font-weight: 400; color: var(--color-ink); margin-bottom: var(--spacing-lg); }
.form-group { margin-bottom: var(--spacing-md); }
.form-group label { display: block; font-size: 13px; font-weight: 500; color: var(--color-ink); margin-bottom: var(--spacing-xs); }
.form-group input, .form-group textarea { width: 100%; padding: 12px 16px; border: 1px solid var(--color-hairline); border-radius: var(--rounded-sm); font-size: 14px; font-family: var(--font-main); color: var(--color-ink); background: var(--color-canvas); outline: none; transition: border-color .15s; }
.form-group input:focus, .form-group textarea:focus { border-color: #458fff; }
.form-group textarea { resize: vertical; min-height: 100px; }
.form-submit { width: 100%; }

/* FOOTER */
.site-footer { background: var(--color-canvas); border-top: 1px solid var(--color-hairline); padding: var(--spacing-section) 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: var(--spacing-xxl); margin-bottom: var(--spacing-xl); }
.footer-brand { font-size: 18px; font-weight: 500; color: var(--color-ink); margin-bottom: var(--spacing-md); }
.footer-brand span { color: var(--color-signature-coral); }
.footer-desc { font-size: 13px; color: var(--color-muted); line-height: 1.6; max-width: 260px; }
.footer-col h4 { font-size: 13px; font-weight: 500; color: var(--color-ink); margin-bottom: var(--spacing-md); text-transform: uppercase; letter-spacing: 0.5px; }
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: var(--spacing-xs); }
.footer-col ul li a { font-size: 13px; color: var(--color-muted); text-decoration: none; }
.footer-col ul li a:hover { color: var(--color-link); }
.footer-bottom { border-top: 1px solid var(--color-hairline); padding-top: var(--spacing-xl); display: flex; align-items: center; justify-content: space-between; gap: var(--spacing-md); flex-wrap: wrap; }
.footer-bottom p { font-size: 13px; color: var(--color-muted); }
.footer-legal-links { display: flex; gap: var(--spacing-lg); }
.footer-legal-links a { font-size: 13px; color: var(--color-muted); text-decoration: none; }
.footer-legal-links a:hover { color: var(--color-link); }

/* COOKIE BANNER */
.cookie-banner { position: fixed; bottom: 0; left: 0; right: 0; background: var(--color-surface-dark); color: #fff; z-index: 9999; padding: var(--spacing-md) var(--spacing-xxl); display: flex; align-items: center; gap: var(--spacing-xl); flex-wrap: wrap; border-top: 1px solid #2d3340; }
.cookie-banner p { font-size: 13px; color: rgba(255,255,255,0.8); flex: 1; min-width: 240px; }
.cookie-banner a { color: #6aa3f5; text-decoration: underline; }
.cookie-actions { display: flex; gap: var(--spacing-sm); flex-shrink: 0; }
.btn-cookie-accept { background: var(--color-link); color: #fff; font-size: 13.12px; font-weight: 600; padding: 10px 16px; border-radius: var(--rounded-xs); border: none; cursor: pointer; }
.btn-cookie-reject { background: transparent; color: rgba(255,255,255,0.7); font-size: 13.12px; font-weight: 600; padding: 10px 16px; border-radius: var(--rounded-xs); border: 1px solid rgba(255,255,255,0.2); cursor: pointer; }
.cookie-banner.hidden { display: none; }

/* DISCLAIMER */
.disclaimer-bar { background: var(--color-surface-soft); border-bottom: 1px solid var(--color-hairline); padding: var(--spacing-xs) 0; }
.disclaimer-bar p { font-size: 12px; color: var(--color-muted); text-align: center; }

/* RESPONSIVE */
@media (max-width: 1023px) {
    .articles-grid { grid-template-columns: repeat(2, 1fr); }
    .demo-grid { grid-template-columns: repeat(2, 1fr); }
    .signature-duo { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .hero-band .container { grid-template-columns: 1fr; }
    .hero-image { display: none; }
    .article-layout { grid-template-columns: 1fr; }
    .article-sidebar { position: static; }
}
@media (max-width: 767px) {
    .articles-grid { grid-template-columns: 1fr; }
    .demo-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
    .nav-links, .nav-right { display: none; }
    .nav-hamburger { display: flex; }
    .nav-links.open { display: flex; flex-direction: column; position: fixed; top: 64px; left: 0; right: 0; bottom: 0; background: var(--color-canvas); padding: var(--spacing-xl); gap: var(--spacing-lg); z-index: 99; }
    .nav-links.open li { border-bottom: 1px solid var(--color-hairline); padding-bottom: var(--spacing-md); }
    .hero-band h1 { font-size: 28px; }
    .section-title { font-size: 24px; }
    .signature-coral h2, .signature-forest h2 { font-size: 24px; }
    .cta-band-light { flex-direction: column; text-align: center; }
    .cookie-banner { padding: var(--spacing-md); }
    .article-hero h1 { font-size: 28px; }
}