*, *::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-pill: 9999px;
    --rounded-full: 50%;
    --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, Oxygen, Ubuntu, sans-serif;
    --font-display: 'Inter Display', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

html { scroll-behavior: smooth; }

body {
    font-family: var(--font-main);
    font-size: 14px;
    font-weight: 400;
    line-height: 1.25;
    color: var(--color-body);
    background: var(--color-canvas);
}

a { color: var(--color-link); text-decoration: none; }
a:hover { text-decoration: underline; }

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

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

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

.nav-inner {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-xxl);
    height: 100%;
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    text-decoration: none;
    flex-shrink: 0;
}

.logo-mark {
    width: 32px;
    height: 32px;
    background: var(--color-primary);
    color: var(--color-on-primary);
    border-radius: var(--rounded-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 16px;
    font-family: var(--font-display);
}

.logo-text {
    font-family: var(--font-display);
    font-size: 18px;
    font-weight: 500;
    color: var(--color-ink);
    letter-spacing: 0.12px;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    list-style: none;
    margin-left: auto;
}

.nav-menu > li > a {
    font-size: 14px;
    font-weight: 400;
    color: var(--color-ink);
    text-decoration: none;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--rounded-sm);
    transition: background 0.15s;
}

.nav-menu > li > a[aria-current="page"],
.nav-menu > li > a:hover {
    background: var(--color-surface-soft);
    text-decoration: none;
}

.nav-has-sub { position: relative; }

.nav-sub {
    display: none;
    position: absolute;
    top: calc(100% + var(--spacing-xs));
    left: 0;
    min-width: 280px;
    background: var(--color-canvas);
    border: 1px solid var(--color-hairline);
    border-radius: var(--rounded-md);
    box-shadow: 0 4px 16px rgba(24,29,38,0.08);
    list-style: none;
    padding: var(--spacing-xs) 0;
    z-index: 200;
}

.nav-has-sub:hover .nav-sub { display: block; }

.nav-sub li a {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 14px;
    color: var(--color-ink);
    text-decoration: none;
}

.nav-sub li a:hover { background: var(--color-surface-soft); }

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

.nav-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--color-ink);
    border-radius: 1px;
    transition: all 0.2s;
}

/* BUTTONS */
.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary);
    color: var(--color-on-primary);
    font-size: 16px;
    font-weight: 500;
    line-height: 1.4;
    padding: 16px 24px;
    border-radius: var(--rounded-lg);
    border: none;
    cursor: pointer;
    text-decoration: none;
    transition: background 0.15s;
    min-height: 48px;
}

.btn-primary:active { background: var(--color-primary-active); text-decoration: none; }
.btn-primary:hover { background: var(--color-primary-active); text-decoration: none; }

.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--color-canvas);
    color: var(--color-ink);
    font-size: 16px;
    font-weight: 500;
    line-height: 1.4;
    padding: 16px 24px;
    border-radius: var(--rounded-lg);
    border: 1px solid var(--color-hairline);
    cursor: pointer;
    text-decoration: none;
    transition: background 0.15s;
    min-height: 48px;
}

.btn-secondary:hover { background: var(--color-surface-soft); text-decoration: none; }

.btn-legal {
    display: inline-flex;
    align-items: center;
    background: var(--color-link);
    color: var(--color-on-primary);
    font-size: 13.12px;
    font-weight: 600;
    padding: 12px 10px;
    border-radius: var(--rounded-xs);
    border: none;
    cursor: pointer;
    text-decoration: none;
    transition: background 0.15s;
}

.btn-legal:hover { background: var(--color-link-active); text-decoration: none; }

/* HERO BAND */
.hero-band {
    padding: var(--spacing-section) 0;
    background: var(--color-canvas);
}

.hero-content {
    max-width: 680px;
}

.hero-tag {
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 0.16px;
    color: var(--color-muted);
    text-transform: uppercase;
    margin-bottom: var(--spacing-md);
}

.hero-h1 {
    font-family: var(--font-display);
    font-size: 40px;
    font-weight: 400;
    line-height: 1.2;
    color: var(--color-ink);
    margin-bottom: var(--spacing-lg);
}

.hero-desc {
    font-size: 16px;
    font-weight: 400;
    line-height: 1.5;
    color: var(--color-body);
    margin-bottom: var(--spacing-xl);
    max-width: 560px;
}

.hero-actions {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

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

.section-title {
    font-family: var(--font-display);
    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);
    line-height: 1.5;
    max-width: 560px;
    margin-bottom: var(--spacing-xxl);
}

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

.article-card {
    background: var(--color-canvas);
    border-radius: var(--rounded-md);
    border: 1px solid var(--color-hairline);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    text-decoration: none;
    transition: box-shadow 0.15s;
}

.article-card:hover {
    box-shadow: 0 4px 20px rgba(24,29,38,0.08);
    text-decoration: none;
}

.article-card-img {
    aspect-ratio: 16/9;
    overflow: hidden;
}

.article-card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

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

.article-card-tag {
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 0.16px;
    color: var(--color-muted);
    text-transform: uppercase;
    margin-bottom: var(--spacing-xs);
}

.article-card-title {
    font-size: 18px;
    font-weight: 500;
    line-height: 1.4;
    color: var(--color-ink);
    margin-bottom: var(--spacing-sm);
}

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

.article-card-meta {
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 0.16px;
    color: var(--color-muted);
    margin-top: var(--spacing-sm);
}

/* SIGNATURE CORAL CARD */
.signature-coral {
    background: var(--color-signature-coral);
    border-radius: var(--rounded-lg);
    padding: var(--spacing-xxl);
    color: var(--color-on-primary);
}

.signature-coral .sig-title {
    font-family: var(--font-display);
    font-size: 32px;
    font-weight: 400;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

.signature-coral .sig-desc {
    font-size: 16px;
    line-height: 1.5;
    opacity: 0.9;
    margin-bottom: var(--spacing-xl);
    max-width: 520px;
}

/* 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 .sig-title {
    font-family: var(--font-display);
    font-size: 32px;
    font-weight: 400;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

.signature-forest .sig-desc {
    font-size: 16px;
    line-height: 1.5;
    opacity: 0.9;
    margin-bottom: var(--spacing-xl);
    max-width: 520px;
}

/* DARK CARD */
.hero-card-dark {
    background: var(--color-surface-dark);
    border-radius: var(--rounded-lg);
    padding: var(--spacing-xxl);
    color: var(--color-on-primary);
}

.hero-card-dark .sig-title {
    font-family: var(--font-display);
    font-size: 32px;
    font-weight: 400;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

.hero-card-dark .sig-desc {
    font-size: 16px;
    line-height: 1.5;
    opacity: 0.85;
    margin-bottom: var(--spacing-xl);
    max-width: 560px;
}

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

/* DEMO GRID */
.demo-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.demo-card {
    border-radius: var(--rounded-md);
    padding: var(--spacing-md);
    overflow: hidden;
}

.demo-card img {
    width: 100%;
    border-radius: var(--rounded-md);
    aspect-ratio: 4/3;
    object-fit: cover;
}

.demo-card-label {
    font-size: 16px;
    font-weight: 500;
    color: var(--color-ink);
    margin-top: var(--spacing-sm);
}

.demo-card-desc {
    font-size: 14px;
    color: var(--color-body);
    margin-top: var(--spacing-xxs);
    line-height: 1.5;
}

/* 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);
    flex-wrap: wrap;
}

.cta-band-light-title {
    font-family: var(--font-display);
    font-size: 32px;
    font-weight: 400;
    color: var(--color-ink);
    line-height: 1.2;
    max-width: 480px;
}

/* CONTACT FORM */
.contact-form {
    background: var(--color-surface-soft);
    border-radius: var(--rounded-lg);
    padding: var(--spacing-xxl);
    max-width: 560px;
}

.form-title {
    font-family: var(--font-display);
    font-size: 24px;
    font-weight: 400;
    color: var(--color-ink);
    margin-bottom: var(--spacing-lg);
    letter-spacing: 0.12px;
}

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

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

.form-group input,
.form-group textarea {
    width: 100%;
    background: var(--color-canvas);
    color: var(--color-ink);
    font-size: 14px;
    font-family: var(--font-main);
    font-weight: 400;
    border: 1px solid var(--color-hairline);
    border-radius: var(--rounded-sm);
    padding: 12px 16px;
    height: 44px;
    outline: none;
    transition: border-color 0.15s;
}

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

.form-group input:focus,
.form-group textarea:focus {
    border-color: #458fff;
}

/* ARTICLE PAGE */
.article-header {
    padding: var(--spacing-section) 0 var(--spacing-xxl);
    border-bottom: 1px solid var(--color-hairline);
    margin-bottom: var(--spacing-xxl);
}

.article-cat {
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 0.16px;
    color: var(--color-muted);
    text-transform: uppercase;
    margin-bottom: var(--spacing-md);
}

.article-h1 {
    font-family: var(--font-display);
    font-size: 40px;
    font-weight: 400;
    line-height: 1.2;
    color: var(--color-ink);
    margin-bottom: var(--spacing-md);
    max-width: 800px;
}

.article-summary {
    font-size: 18px;
    font-weight: 400;
    line-height: 1.5;
    color: var(--color-body);
    max-width: 680px;
    margin-bottom: var(--spacing-md);
}

.article-meta {
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 0.16px;
    color: var(--color-muted);
}

.article-layout {
    display: grid;
    grid-template-columns: 1fr 280px;
    gap: var(--spacing-xxl);
    align-items: start;
}

.article-body h2 {
    font-family: var(--font-display);
    font-size: 28px;
    font-weight: 400;
    color: var(--color-ink);
    margin: var(--spacing-xxl) 0 var(--spacing-md);
    line-height: 1.3;
}

.article-body h3 {
    font-size: 20px;
    font-weight: 400;
    color: var(--color-ink);
    margin: var(--spacing-xl) 0 var(--spacing-sm);
    line-height: 1.5;
}

.article-body p {
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-body);
    margin-bottom: var(--spacing-md);
}

.article-body ul,
.article-body ol {
    margin: 0 0 var(--spacing-md) var(--spacing-xl);
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-body);
}

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

.article-body a { color: var(--color-link); }
.article-body a:hover { color: var(--color-link-active); }

.article-figure {
    margin: var(--spacing-xl) 0;
    border-radius: var(--rounded-md);
    overflow: hidden;
}

.article-figure img {
    width: 100%;
    border-radius: var(--rounded-md);
}

.article-figure figcaption {
    font-size: 13.12px;
    font-weight: 600;
    color: var(--color-muted);
    margin-top: var(--spacing-xs);
    letter-spacing: 0px;
}

.article-sidebar {
    position: sticky;
    top: 80px;
}

.sidebar-box {
    background: var(--color-surface-soft);
    border-radius: var(--rounded-md);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
}

.sidebar-box h4 {
    font-size: 16px;
    font-weight: 500;
    color: var(--color-ink);
    margin-bottom: var(--spacing-md);
}

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

.sidebar-box ul li {
    border-bottom: 1px solid var(--color-hairline);
    padding: var(--spacing-xs) 0;
}

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

.sidebar-box ul li a {
    font-size: 14px;
    color: var(--color-ink);
}

/* PAGE LAYOUT */
.page-header {
    padding: var(--spacing-section) 0 var(--spacing-xxl);
}

.page-h1 {
    font-family: var(--font-display);
    font-size: 40px;
    font-weight: 400;
    line-height: 1.2;
    color: var(--color-ink);
    margin-bottom: var(--spacing-md);
}

.page-sub {
    font-size: 18px;
    color: var(--color-body);
    line-height: 1.5;
    max-width: 560px;
}

.page-body {
    max-width: 800px;
    padding-bottom: var(--spacing-section);
}

.page-body h2 {
    font-family: var(--font-display);
    font-size: 24px;
    font-weight: 400;
    color: var(--color-ink);
    margin: var(--spacing-xxl) 0 var(--spacing-md);
    letter-spacing: 0.12px;
}

.page-body p {
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-body);
    margin-bottom: var(--spacing-md);
}

.page-body ul {
    margin: 0 0 var(--spacing-md) var(--spacing-xl);
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-body);
}

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

.page-body a { color: var(--color-link); }

/* FOOTER */
.site-footer {
    background: var(--color-canvas);
    border-top: 1px solid var(--color-hairline);
}

.footer-inner {
    max-width: 1280px;
    margin: 0 auto;
    padding: var(--spacing-section) var(--spacing-xxl) var(--spacing-xl);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--spacing-xxl);
    margin-bottom: var(--spacing-xxl);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    text-decoration: none;
    margin-bottom: var(--spacing-md);
}

.footer-desc {
    font-size: 14px;
    color: var(--color-muted);
    line-height: 1.6;
    max-width: 320px;
    margin-bottom: var(--spacing-lg);
}

.footer-contact {
    font-style: normal;
}

.footer-contact p {
    font-size: 14px;
    color: var(--color-muted);
    line-height: 1.6;
}

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

.footer-links h3 {
    font-size: 14px;
    font-weight: 500;
    color: var(--color-ink);
    margin-bottom: var(--spacing-md);
}

.footer-links ul { list-style: none; }

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

.footer-links ul li a {
    font-size: 14px;
    color: var(--color-muted);
}

.footer-bottom {
    border-top: 1px solid var(--color-hairline);
    padding-top: var(--spacing-md);
}

.footer-bottom p {
    font-size: 14px;
    color: var(--color-muted);
}

/* COOKIE BANNER */
.cookie-banner {
    position: fixed;
    bottom: var(--spacing-lg);
    left: var(--spacing-lg);
    right: var(--spacing-lg);
    max-width: 640px;
    background: var(--color-surface-dark);
    color: var(--color-on-primary);
    border-radius: var(--rounded-md);
    padding: var(--spacing-lg);
    z-index: 999;
    display: none;
    box-shadow: 0 8px 32px rgba(0,0,0,0.24);
}

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

.cookie-banner p {
    font-size: 14px;
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
    opacity: 0.9;
}

.cookie-banner a { color: var(--color-signature-mint); }

.cookie-actions {
    display: flex;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
}

/* DISCLAIMER */
.disclaimer {
    background: var(--color-signature-cream);
    border-radius: var(--rounded-md);
    padding: var(--spacing-lg);
    margin: var(--spacing-xl) 0;
    font-size: 14px;
    color: var(--color-body);
    line-height: 1.6;
}

/* UTILITY */
.text-muted { color: var(--color-muted); }
.mt-section { margin-top: var(--spacing-section); }
.mb-section { margin-bottom: var(--spacing-section); }
.mt-xl { margin-top: var(--spacing-xl); }
.mb-xl { margin-bottom: var(--spacing-xl); }

/* RESPONSIVE */
@media (max-width: 1024px) {
    .articles-grid { grid-template-columns: repeat(2, 1fr); }
    .demo-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .footer-brand { grid-column: 1 / -1; }
    .article-layout { grid-template-columns: 1fr; }
    .article-sidebar { position: static; }
}

@media (max-width: 768px) {
    .container { padding: 0 var(--spacing-md); }
    .nav-inner { padding: 0 var(--spacing-md); }
    .footer-inner { padding: var(--spacing-xxl) var(--spacing-md) var(--spacing-lg); }

    .nav-toggle { display: flex; }

    .nav-menu {
        display: none;
        position: fixed;
        inset: 64px 0 0 0;
        background: var(--color-canvas);
        flex-direction: column;
        align-items: flex-start;
        padding: var(--spacing-xl) var(--spacing-md);
        gap: var(--spacing-xs);
        overflow-y: auto;
        z-index: 100;
    }

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

    .nav-menu > li { width: 100%; }
    .nav-menu > li > a { display: block; padding: var(--spacing-sm) var(--spacing-md); width: 100%; }

    .nav-sub {
        display: block;
        position: static;
        box-shadow: none;
        border: none;
        border-left: 2px solid var(--color-hairline);
        border-radius: 0;
        margin-left: var(--spacing-md);
        padding: 0;
    }

    .hero-h1 { font-size: 28px; }
    .section-title { font-size: 24px; }
    .signature-coral .sig-title,
    .signature-forest .sig-title,
    .hero-card-dark .sig-title { font-size: 24px; }
    .articles-grid { grid-template-columns: 1fr; }
    .demo-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
    .cta-band-light { flex-direction: column; align-items: flex-start; }
    .cta-band-light-title { font-size: 24px; }
    .article-h1 { font-size: 28px; }
    .page-h1 { font-size: 28px; }
    .signature-coral,
    .signature-forest,
    .hero-card-dark { padding: var(--spacing-xl); }
}