@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&family=Inter+Display:wght@400;500&display=swap');

*, *::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-hairline: #dddddd;
    --color-ink: #181d26;
    --color-body: #333840;
    --color-muted: #41454d;
    --color-on-primary: #ffffff;
    --color-link: #1b61c9;
    --color-signature-coral: #aa2d00;
    --color-signature-forest: #0a2e0e;
    --color-signature-cream: #f5e9d4;
    --color-signature-peach: #fcab79;
    --color-signature-mint: #a8d8c4;
    --color-signature-yellow: #f4d35e;
    --rounded-sm: 6px;
    --rounded-md: 10px;
    --rounded-lg: 12px;
    --rounded-xs: 2px;
    --spacing-xxs: 4px;
    --spacing-xs: 8px;
    --spacing-sm: 12px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-xxl: 48px;
    --spacing-section: 96px;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 14px;
    font-weight: 400;
    line-height: 1.25;
    color: var(--color-body);
    background: var(--color-canvas);
    -webkit-font-smoothing: antialiased;
}

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);
}

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

.top-nav .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
}

.nav-brand {
    font-family: 'Inter Display', 'Inter', sans-serif;
    font-size: 18px;
    font-weight: 500;
    color: var(--color-ink);
    text-decoration: none;
    letter-spacing: -0.3px;
}

.nav-brand:hover {
    text-decoration: none;
}

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

.nav-menu a {
    font-size: 14px;
    font-weight: 400;
    color: var(--color-body);
    text-decoration: none;
}

.nav-menu a:hover {
    color: var(--color-ink);
    text-decoration: none;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.btn-primary {
    background: var(--color-primary);
    color: var(--color-on-primary);
    font-size: 16px;
    font-weight: 500;
    line-height: 1.4;
    padding: 12px var(--spacing-lg);
    border-radius: var(--rounded-lg);
    border: none;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
    transition: background 0.15s ease;
}

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

.btn-secondary {
    background: var(--color-canvas);
    color: var(--color-ink);
    font-size: 16px;
    font-weight: 500;
    line-height: 1.4;
    padding: 12px var(--spacing-lg);
    border-radius: var(--rounded-lg);
    border: 1px solid var(--color-hairline);
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
    transition: border-color 0.15s ease;
}

.btn-secondary:hover {
    border-color: var(--color-ink);
    text-decoration: none;
    color: var(--color-ink);
}

.btn-secondary-on-dark {
    background: var(--color-canvas);
    color: var(--color-ink);
    font-size: 16px;
    font-weight: 500;
    line-height: 1.4;
    padding: 12px var(--spacing-lg);
    border-radius: var(--rounded-lg);
    border: none;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
}

.btn-secondary-on-dark:hover {
    opacity: 0.9;
    text-decoration: none;
    color: var(--color-ink);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    background: none;
    border: none;
    padding: 4px;
}

.hamburger span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--color-ink);
    border-radius: 2px;
}

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

.hero-band h1 {
    font-family: 'Inter Display', 'Inter', sans-serif;
    font-size: 40px;
    font-weight: 400;
    line-height: 1.2;
    color: var(--color-ink);
    max-width: 640px;
    margin-bottom: var(--spacing-lg);
}

.hero-band p {
    font-size: 14px;
    font-weight: 400;
    color: var(--color-body);
    max-width: 520px;
    margin-bottom: var(--spacing-xl);
    line-height: 1.6;
}

.hero-band .btn-row {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
    flex-wrap: wrap;
}

/* SECTION TITLES */
.section-title {
    font-family: 'Inter Display', 'Inter', sans-serif;
    font-size: 24px;
    font-weight: 400;
    line-height: 1.35;
    letter-spacing: 0.12px;
    color: var(--color-ink);
    margin-bottom: var(--spacing-md);
}

.section-sub {
    font-size: 14px;
    color: var(--color-body);
    line-height: 1.6;
    max-width: 560px;
    margin-bottom: var(--spacing-xxl);
}

/* BODY SECTIONS */
.body-section {
    padding: var(--spacing-section) 0;
    background: var(--color-canvas);
}

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

.signature-coral-card h2 {
    font-family: 'Inter Display', 'Inter', sans-serif;
    font-size: 32px;
    font-weight: 400;
    line-height: 1.2;
    color: var(--color-on-primary);
    margin-bottom: var(--spacing-md);
    max-width: 560px;
}

.signature-coral-card p {
    font-size: 14px;
    line-height: 1.6;
    color: rgba(255,255,255,0.85);
    max-width: 480px;
    margin-bottom: var(--spacing-xl);
}

.signature-coral-section {
    padding: var(--spacing-section) 0;
    background: var(--color-canvas);
}

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

.signature-forest-card h2 {
    font-family: 'Inter Display', 'Inter', sans-serif;
    font-size: 32px;
    font-weight: 400;
    line-height: 1.2;
    color: var(--color-on-primary);
    margin-bottom: var(--spacing-md);
}

.signature-forest-card p {
    font-size: 14px;
    line-height: 1.6;
    color: rgba(255,255,255,0.8);
    max-width: 480px;
    margin-bottom: var(--spacing-xl);
}

/* 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 h2 {
    font-family: 'Inter Display', 'Inter', sans-serif;
    font-size: 32px;
    font-weight: 400;
    line-height: 1.2;
    color: var(--color-on-primary);
    margin-bottom: var(--spacing-md);
}

.hero-card-dark p {
    font-size: 14px;
    line-height: 1.6;
    color: rgba(255,255,255,0.8);
    max-width: 480px;
    margin-bottom: var(--spacing-xl);
}

/* CREAM CALLOUT */
.cream-callout {
    background: var(--color-signature-cream);
    border-radius: var(--rounded-md);
    padding: var(--spacing-section) 0;
}

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

.cream-callout h2 {
    font-family: 'Inter Display', 'Inter', sans-serif;
    font-size: 32px;
    font-weight: 400;
    line-height: 1.2;
    color: var(--color-ink);
    margin-bottom: var(--spacing-md);
}

.cream-callout p {
    font-size: 14px;
    line-height: 1.6;
    color: var(--color-body);
    margin-bottom: var(--spacing-lg);
}

/* ARTICLE CARDS GRID */
.article-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;
    text-decoration: none;
    display: block;
    transition: box-shadow 0.15s ease;
}

.article-card:hover {
    box-shadow: 0 4px 16px rgba(24,29,38,0.08);
    text-decoration: none;
}

.article-card-img {
    width: 100%;
    aspect-ratio: 16/9;
    object-fit: cover;
}

.article-card-body {
    padding: var(--spacing-md);
}

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

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

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

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

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

.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 h3 {
    font-size: 16px;
    font-weight: 500;
    line-height: 1.4;
    color: var(--color-ink);
    margin-top: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
}

.demo-card p {
    font-size: 14px;
    line-height: 1.6;
    color: var(--color-body);
}

/* CTA BAND LIGHT */
.cta-band-light {
    background: var(--color-surface-strong);
    padding: var(--spacing-section) 0;
}

.cta-band-light .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-xl);
}

.cta-band-light h2 {
    font-family: 'Inter Display', 'Inter', sans-serif;
    font-size: 32px;
    font-weight: 400;
    line-height: 1.2;
    color: var(--color-ink);
    max-width: 560px;
}

/* CONTACT FORM */
.contact-form-section {
    padding: var(--spacing-section) 0;
    background: var(--color-surface-soft);
}

.contact-form {
    max-width: 560px;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

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

.form-group input,
.form-group textarea {
    background: var(--color-canvas);
    color: var(--color-ink);
    font-size: 14px;
    font-family: inherit;
    border-radius: var(--rounded-sm);
    padding: 12px var(--spacing-md);
    height: 44px;
    border: 1px solid var(--color-hairline);
    outline: none;
    width: 100%;
}

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

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

/* FOOTER */
.site-footer {
    background: var(--color-canvas);
    border-top: 1px solid var(--color-hairline);
    padding: var(--spacing-section) 0 var(--spacing-xl);
}

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

.footer-brand {
    font-family: 'Inter Display', 'Inter', sans-serif;
    font-size: 16px;
    font-weight: 500;
    color: var(--color-ink);
    margin-bottom: var(--spacing-sm);
    display: block;
}

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

.footer-contact-item {
    font-size: 14px;
    color: var(--color-muted);
    line-height: 1.8;
}

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

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

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.footer-links a {
    font-size: 14px;
    color: var(--color-muted);
    text-decoration: none;
}

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

.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-hairline);
    font-size: 14px;
    color: var(--color-muted);
}

.footer-bottom-links {
    display: flex;
    gap: var(--spacing-lg);
}

.footer-bottom-links a {
    font-size: 14px;
    color: var(--color-muted);
    text-decoration: none;
}

/* ARTICLE PAGE */
.article-page {
    padding: var(--spacing-section) 0;
}

.article-header {
    max-width: 720px;
    margin-bottom: var(--spacing-xxl);
}

.article-header .article-tag {
    font-size: 11px;
    font-weight: 500;
    letter-spacing: 0.8px;
    text-transform: uppercase;
    color: var(--color-muted);
    margin-bottom: var(--spacing-md);
}

.article-header h1 {
    font-family: 'Inter Display', 'Inter', sans-serif;
    font-size: 40px;
    font-weight: 400;
    line-height: 1.2;
    color: var(--color-ink);
    margin-bottom: var(--spacing-md);
}

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

.article-hero-img {
    width: 100%;
    max-height: 480px;
    object-fit: cover;
    border-radius: var(--rounded-md);
    margin-bottom: var(--spacing-xxl);
}

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

.article-body h2 {
    font-family: 'Inter Display', 'Inter', sans-serif;
    font-size: 24px;
    font-weight: 400;
    line-height: 1.35;
    color: var(--color-ink);
    margin-top: var(--spacing-xxl);
    margin-bottom: var(--spacing-md);
}

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

.article-body p {
    font-size: 14px;
    line-height: 1.7;
    color: var(--color-body);
    margin-bottom: var(--spacing-md);
}

.article-body ul,
.article-body ol {
    margin-left: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
}

.article-body li {
    font-size: 14px;
    line-height: 1.7;
    color: var(--color-body);
    margin-bottom: var(--spacing-xs);
}

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

.article-body img {
    border-radius: var(--rounded-md);
    margin: var(--spacing-xl) 0;
    width: 100%;
    max-height: 400px;
    object-fit: cover;
}

.article-body blockquote {
    border-left: 3px solid var(--color-signature-coral);
    padding-left: var(--spacing-lg);
    margin: var(--spacing-xl) 0;
    color: var(--color-body);
    font-size: 14px;
    line-height: 1.7;
}

/* BREADCRUMB */
.breadcrumb {
    font-size: 14px;
    color: var(--color-muted);
    padding: var(--spacing-md) 0;
    display: flex;
    gap: var(--spacing-xs);
    align-items: center;
}

.breadcrumb a {
    color: var(--color-muted);
    text-decoration: none;
}

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

.breadcrumb-sep {
    color: var(--color-hairline);
}

/* RELATED ARTICLES */
.related-section {
    padding: var(--spacing-section) 0;
    background: var(--color-surface-soft);
}

/* PAGE (ABOUT / PRIVACY / TERMS) */
.page-body {
    padding: var(--spacing-section) 0;
    max-width: 720px;
    margin: 0 auto;
}

.page-body h1 {
    font-family: 'Inter Display', 'Inter', sans-serif;
    font-size: 40px;
    font-weight: 400;
    line-height: 1.2;
    color: var(--color-ink);
    margin-bottom: var(--spacing-lg);
}

.page-body h2 {
    font-family: 'Inter Display', 'Inter', sans-serif;
    font-size: 24px;
    font-weight: 400;
    line-height: 1.35;
    color: var(--color-ink);
    margin-top: var(--spacing-xxl);
    margin-bottom: var(--spacing-md);
}

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

.page-body p {
    font-size: 14px;
    line-height: 1.7;
    color: var(--color-body);
    margin-bottom: var(--spacing-md);
}

.page-body ul {
    margin-left: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
}

.page-body li {
    font-size: 14px;
    line-height: 1.7;
    color: var(--color-body);
    margin-bottom: var(--spacing-xs);
}

.page-body .updated {
    font-size: 14px;
    font-weight: 500;
    color: var(--color-muted);
    margin-bottom: var(--spacing-xxl);
}

/* COOKIE BANNER */
.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--color-surface-dark);
    color: var(--color-on-primary);
    padding: var(--spacing-lg) var(--spacing-xxl);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-xl);
    z-index: 999;
    font-size: 14px;
    line-height: 1.5;
}

.cookie-banner p {
    max-width: 720px;
    color: rgba(255,255,255,0.85);
}

.cookie-banner p a {
    color: rgba(255,255,255,0.85);
    text-decoration: underline;
}

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

.btn-cookie-accept {
    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;
    white-space: nowrap;
}

.btn-cookie-reject {
    background: transparent;
    color: rgba(255,255,255,0.7);
    font-size: 13.12px;
    font-weight: 600;
    padding: 12px 10px;
    border-radius: var(--rounded-xs);
    border: 1px solid rgba(255,255,255,0.3);
    cursor: pointer;
    white-space: nowrap;
}

/* DISCLAIMER */
.disclaimer-band {
    background: var(--color-surface-soft);
    border-top: 1px solid var(--color-hairline);
    padding: var(--spacing-lg) 0;
    font-size: 14px;
    color: var(--color-muted);
    line-height: 1.6;
}

/* STATS ROW */
.stats-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xxl);
}

.stat-item {
    padding: var(--spacing-lg);
    background: var(--color-surface-soft);
    border-radius: var(--rounded-md);
    border: 1px solid var(--color-hairline);
}

.stat-number {
    font-family: 'Inter Display', 'Inter', sans-serif;
    font-size: 32px;
    font-weight: 400;
    color: var(--color-ink);
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: 14px;
    color: var(--color-muted);
}

/* MOBILE NAV OVERLAY */
.mobile-nav-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: var(--color-canvas);
    z-index: 200;
    flex-direction: column;
    padding: var(--spacing-xl) var(--spacing-xxl);
}

.mobile-nav-overlay.open {
    display: flex;
}

.mobile-nav-close {
    align-self: flex-end;
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--color-ink);
    margin-bottom: var(--spacing-xl);
}

.mobile-nav-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.mobile-nav-list a {
    font-size: 24px;
    font-weight: 400;
    color: var(--color-ink);
    text-decoration: none;
}

/* SCHEMA IMG CAPTION */
.img-caption {
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 0.16px;
    color: var(--color-muted);
    margin-top: var(--spacing-xs);
    text-align: center;
}

/* RESPONSIVE */
@media (max-width: 1024px) {
    .article-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .demo-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
    .cream-callout .container {
        grid-template-columns: 1fr;
    }
    .cta-band-light .container {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    .nav-menu,
    .nav-actions {
        display: none;
    }
    .hamburger {
        display: flex;
    }
    .hero-band {
        padding: var(--spacing-xxl) 0;
    }
    .hero-band h1 {
        font-size: 28px;
    }
    .body-section {
        padding: var(--spacing-xxl) 0;
    }
    .article-grid {
        grid-template-columns: 1fr;
    }
    .demo-grid {
        grid-template-columns: 1fr;
    }
    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-md);
        align-items: flex-start;
    }
    .stats-row {
        grid-template-columns: 1fr;
    }
    .article-header h1 {
        font-size: 28px;
    }
    .cookie-banner {
        flex-direction: column;
        align-items: flex-start;
        padding: var(--spacing-md);
    }
    .signature-coral-card h2,
    .signature-forest-card h2,
    .hero-card-dark h2 {
        font-size: 24px;
    }
    .page-body {
        padding: var(--spacing-xxl) var(--spacing-md);
    }
}