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

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

:root {
    --color-canvas: #f7f7f4;
    --color-canvas-soft: #fafaf7;
    --color-surface-card: #ffffff;
    --color-surface-strong: #e6e5e0;
    --color-primary: #f54e00;
    --color-primary-active: #d04200;
    --color-ink: #26251e;
    --color-body: #5a5852;
    --color-body-strong: #26251e;
    --color-muted: #807d72;
    --color-muted-soft: #a09c92;
    --color-on-primary: #ffffff;
    --color-hairline: #e6e5e0;
    --color-hairline-soft: #efeee8;
    --color-hairline-strong: #cfcdc4;
    --color-success: #1f8a65;
    --color-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;
}

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

body {
    background-color: var(--color-canvas);
    color: var(--color-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(--color-ink);
    text-decoration: none;
}

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

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

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

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

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

.nav-brand {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-ink);
    letter-spacing: -0.2px;
}

.nav-brand span {
    color: var(--color-primary);
}

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

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

.nav-links a:hover,
.nav-links a.active {
    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-color: var(--color-ink);
    transition: all 0.2s ease;
}

.site-header {
    background-color: var(--color-canvas);
    padding: var(--spacing-section) 0;
    border-bottom: 1px solid var(--color-hairline);
}

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

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

.hero-text p {
    font-size: 18px;
    color: var(--color-body);
    line-height: 1.6;
    margin-bottom: var(--spacing-xxl);
    max-width: 480px;
}

.hero-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 13px;
    color: var(--color-muted);
}

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

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

.hero-image 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(--color-muted);
    margin-bottom: var(--spacing-base);
}

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

.section-subtitle {
    font-size: 16px;
    color: var(--color-body);
    max-width: 640px;
    line-height: 1.6;
    margin-bottom: var(--spacing-xxl);
}

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

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

.article-card {
    background-color: var(--color-surface-card);
    border: 1px solid var(--color-hairline);
    border-radius: var(--rounded-lg);
    overflow: hidden;
    transition: border-color 0.15s ease;
}

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

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

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

.article-card-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-sm);
}

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

.article-card h2,
.article-card h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-ink);
    line-height: 1.4;
    margin-bottom: var(--spacing-sm);
}

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

.article-card-link {
    display: block;
    color: inherit;
    text-decoration: none;
}

.article-card-link:hover .article-card h3 {
    color: var(--color-primary);
}

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

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

.feature-card-icon {
    width: 40px;
    height: 40px;
    background-color: var(--color-surface-strong);
    border-radius: var(--rounded-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-base);
    font-size: 18px;
}

.feature-card h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-ink);
    margin-bottom: var(--spacing-xs);
}

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

.contact-section {
    background-color: var(--color-canvas-soft);
    border-top: 1px solid var(--color-hairline);
    border-bottom: 1px solid var(--color-hairline);
}

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

.contact-info h2 {
    font-size: 36px;
    font-weight: 400;
    letter-spacing: -0.72px;
    color: var(--color-ink);
    margin-bottom: var(--spacing-base);
}

.contact-info p {
    font-size: 16px;
    color: var(--color-body);
    line-height: 1.6;
    margin-bottom: var(--spacing-xxl);
}

.contact-details {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.contact-details li {
    font-size: 14px;
    color: var(--color-body);
}

.contact-details strong {
    color: var(--color-ink);
    font-weight: 600;
}

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

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

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

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

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

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

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

.btn-primary {
    display: inline-block;
    background-color: var(--color-primary);
    color: var(--color-on-primary);
    font-size: 14px;
    font-weight: 500;
    line-height: 1;
    padding: 10px 18px;
    height: 40px;
    border-radius: var(--rounded-md);
    border: none;
    cursor: pointer;
    transition: background-color 0.15s ease;
    font-family: inherit;
    white-space: nowrap;
}

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

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

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

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

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

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

.form-message.success {
    color: var(--color-success);
    background-color: #f0faf5;
    border: 1px solid #b8e0d1;
}

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

.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);
}

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

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

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

.btn-cookie-accept {
    background-color: var(--color-primary);
    color: var(--color-on-primary);
    border: none;
    border-radius: var(--rounded-md);
    padding: 8px 16px;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    font-family: inherit;
    transition: background-color 0.15s ease;
}

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

.btn-cookie-reject {
    background-color: transparent;
    color: var(--color-canvas);
    border: 1px solid rgba(247,247,244,0.3);
    border-radius: var(--rounded-md);
    padding: 8px 16px;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    font-family: inherit;
    transition: border-color 0.15s ease;
}

.btn-cookie-reject:hover {
    border-color: rgba(247,247,244,0.7);
}

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

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

.footer-brand p {
    font-size: 14px;
    color: var(--color-body);
    line-height: 1.6;
    margin-top: var(--spacing-base);
    max-width: 260px;
}

.footer-col h4 {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    color: var(--color-muted);
    margin-bottom: var(--spacing-base);
}

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

.footer-col a {
    font-size: 14px;
    color: var(--color-body);
    transition: color 0.15s ease;
}

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

.footer-bottom {
    max-width: 1200px;
    margin: var(--spacing-xxl) auto 0;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-hairline);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

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

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

.page-hero {
    padding: var(--spacing-xxl) 0;
    border-bottom: 1px solid var(--color-hairline);
}

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

.page-hero p {
    font-size: 16px;
    color: var(--color-muted);
    max-width: 600px;
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 13px;
    color: var(--color-muted);
    margin-bottom: var(--spacing-base);
    list-style: none;
}

.breadcrumb li + li::before {
    content: '/';
    margin-right: var(--spacing-xs);
    color: var(--color-muted-soft);
}

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

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

.article-layout {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: var(--spacing-xxl);
    align-items: start;
}

.article-content h1 {
    font-size: 36px;
    font-weight: 400;
    letter-spacing: -0.72px;
    color: var(--color-ink);
    margin-bottom: var(--spacing-lg);
    line-height: 1.25;
}

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

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

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

.article-content ul,
.article-content ol {
    padding-left: var(--spacing-xl);
    margin-bottom: var(--spacing-base);
}

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

.article-content strong {
    color: var(--color-ink);
    font-weight: 600;
}

.article-content a {
    color: var(--color-primary);
    text-decoration: underline;
}

.article-content img {
    width: 100%;
    border-radius: var(--rounded-lg);
    border: 1px solid var(--color-hairline);
    margin: var(--spacing-xl) 0;
}

.article-content figcaption {
    font-size: 13px;
    color: var(--color-muted);
    margin-top: calc(-1 * var(--spacing-base));
    margin-bottom: var(--spacing-xl);
}

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

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

.article-sidebar {
    position: sticky;
    top: 80px;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

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

.sidebar-card h4 {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    color: var(--color-muted);
    margin-bottom: var(--spacing-base);
}

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

.sidebar-toc a {
    font-size: 14px;
    color: var(--color-body);
    display: block;
    padding: 3px 0;
    transition: color 0.15s ease;
}

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

.data-table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--spacing-xl) 0;
    font-size: 14px;
}

.data-table th {
    background-color: var(--color-surface-strong);
    color: var(--color-ink);
    font-weight: 600;
    text-align: left;
    padding: 10px 14px;
    border-bottom: 1px solid var(--color-hairline);
}

.data-table td {
    color: var(--color-body);
    padding: 10px 14px;
    border-bottom: 1px solid var(--color-hairline-soft);
}

.data-table tr:last-child td {
    border-bottom: none;
}

.prose {
    max-width: 720px;
}

.prose h1, .prose h2, .prose h3 {
    color: var(--color-ink);
}

.prose p, .prose li {
    color: var(--color-body);
    line-height: 1.7;
}

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

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

.prose p {
    font-size: 16px;
    margin-bottom: var(--spacing-base);
}

.prose ul, .prose ol {
    padding-left: var(--spacing-xl);
    margin-bottom: var(--spacing-base);
}

.prose li {
    font-size: 16px;
    margin-bottom: var(--spacing-xs);
}

.disclaimer {
    background-color: var(--color-surface-card);
    border: 1px solid var(--color-hairline);
    border-left: 3px solid var(--color-primary);
    border-radius: var(--rounded-md);
    padding: var(--spacing-base) var(--spacing-lg);
    margin: var(--spacing-xl) 0;
}

.disclaimer p {
    font-size: 13px;
    color: var(--color-muted);
    margin: 0;
}

@media (max-width: 1024px) {
    .site-header .container {
        grid-template-columns: 1fr;
    }

    .hero-text h1 {
        font-size: 42px;
    }

    .articles-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-inner {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-xl);
    }

    .article-layout {
        grid-template-columns: 1fr;
    }

    .article-sidebar {
        position: static;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-base);
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background-color: var(--color-canvas);
        border-bottom: 1px solid var(--color-hairline);
        flex-direction: column;
        padding: var(--spacing-base);
        gap: var(--spacing-sm);
    }

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

    .nav-hamburger {
        display: flex;
    }

    .hero-text h1 {
        font-size: 32px;
        letter-spacing: -0.8px;
    }

    .hero-text p {
        font-size: 16px;
    }

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

    .section-title {
        font-size: 26px;
    }

    .articles-grid {
        grid-template-columns: 1fr;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .contact-grid {
        grid-template-columns: 1fr;
    }

    .footer-inner {
        grid-template-columns: 1fr;
    }

    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-sm);
        text-align: center;
    }

    .cookie-inner {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (max-width: 640px) {
    .hero-text h1 {
        font-size: 28px;
    }
}