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

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

body {
    background: 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;
}

a { color: inherit; text-decoration: none; }
a:hover { color: var(--ink); }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }

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

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

.rh-nav__inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-lg);
}

.rh-nav__logo {
    font-size: 16px;
    font-weight: 600;
    color: var(--ink);
    letter-spacing: -0.3px;
    white-space: nowrap;
    flex-shrink: 0;
}

.rh-nav__tld { color: var(--primary); }

.rh-nav__links {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.rh-nav__links li a {
    font-size: 14px;
    font-weight: 500;
    color: var(--body);
    transition: color 0.15s;
    white-space: nowrap;
}

.rh-nav__links li a:hover,
.rh-nav__links li a[aria-current="page"] {
    color: var(--ink);
}

.rh-nav__burger {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    width: 32px;
    height: 32px;
    padding: 4px;
}

.rh-nav__burger span {
    display: block;
    width: 20px;
    height: 1.5px;
    background: var(--ink);
    border-radius: 2px;
    transition: transform 0.2s, opacity 0.2s;
}

.rh-nav__burger.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.rh-nav__burger.open span:nth-child(2) { opacity: 0; }
.rh-nav__burger.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

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

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

.hero__title {
    font-size: 56px;
    font-weight: 400;
    line-height: 1.1;
    letter-spacing: -1.5px;
    color: var(--ink);
    max-width: 720px;
    margin-bottom: var(--spacing-lg);
}

.hero__desc {
    font-size: 18px;
    color: var(--body);
    max-width: 560px;
    margin-bottom: var(--spacing-xl);
    line-height: 1.6;
}

.hero__meta {
    font-size: 13px;
    color: var(--muted);
}

.hero__img {
    margin-top: var(--spacing-xxl);
    border-radius: var(--rounded-lg);
    border: 1px solid var(--hairline);
    width: 100%;
    max-height: 460px;
    object-fit: cover;
}

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

.section--bordered {
    border-bottom: 1px solid var(--hairline);
}

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

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

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

.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;
    transition: border-color 0.15s;
}

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

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

.article-card__body {
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    flex: 1;
}

.article-card__tag {
    display: inline-block;
    background: var(--surface-strong);
    color: var(--muted);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    padding: 3px 8px;
    border-radius: var(--rounded-pill);
    margin-bottom: var(--spacing-sm);
    width: fit-content;
}

.article-card__title {
    font-size: 18px;
    font-weight: 600;
    line-height: 1.3;
    color: var(--ink);
    margin-bottom: var(--spacing-sm);
}

.article-card__excerpt {
    font-size: 14px;
    color: var(--body);
    line-height: 1.5;
    flex: 1;
    margin-bottom: var(--spacing-base);
}

.article-card__meta {
    font-size: 12px;
    color: var(--muted);
}

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

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

.highlight-card__icon {
    width: 36px;
    height: 36px;
    border-radius: var(--rounded-md);
    background: var(--surface-strong);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-base);
    font-size: 18px;
}

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

.highlight-card__text {
    font-size: 14px;
    color: var(--body);
    line-height: 1.5;
}

.article-hero {
    padding: var(--spacing-section) 0 var(--spacing-xl);
    border-bottom: 1px solid var(--hairline);
}

.article-hero__breadcrumb {
    font-size: 13px;
    color: var(--muted);
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.article-hero__breadcrumb a { color: var(--muted); }
.article-hero__breadcrumb a:hover { color: var(--ink); }

.article-hero__tag {
    display: inline-block;
    background: var(--surface-strong);
    color: var(--muted);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    padding: 3px 8px;
    border-radius: var(--rounded-pill);
    margin-bottom: var(--spacing-base);
}

.article-hero__title {
    font-size: 42px;
    font-weight: 400;
    line-height: 1.15;
    letter-spacing: -0.9px;
    color: var(--ink);
    max-width: 760px;
    margin-bottom: var(--spacing-base);
}

.article-hero__desc {
    font-size: 18px;
    color: var(--body);
    max-width: 640px;
    line-height: 1.6;
    margin-bottom: var(--spacing-lg);
}

.article-hero__meta {
    font-size: 13px;
    color: var(--muted);
    margin-bottom: var(--spacing-xxl);
}

.article-hero__img {
    width: 100%;
    max-height: 480px;
    object-fit: cover;
    border-radius: var(--rounded-lg);
    border: 1px solid var(--hairline);
}

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

.article-content h2 {
    font-size: 26px;
    font-weight: 400;
    line-height: 1.25;
    letter-spacing: -0.325px;
    color: var(--ink);
    margin-top: var(--spacing-xxl);
    margin-bottom: var(--spacing-base);
}

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

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

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

.article-content ul { list-style: disc; }
.article-content ol { list-style: decimal; }

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

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

.article-content a:hover { color: var(--primary-active); }

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

.article-content .info-box p {
    margin-bottom: 0;
    font-size: 14px;
    color: var(--body);
}

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

.article-content table th {
    background: var(--surface-strong);
    color: var(--ink);
    font-weight: 600;
    padding: var(--spacing-sm) var(--spacing-base);
    text-align: left;
    border: 1px solid var(--hairline);
}

.article-content table td {
    padding: var(--spacing-sm) var(--spacing-base);
    border: 1px solid var(--hairline);
    color: var(--body);
}

.article-content table tr:nth-child(even) td {
    background: var(--canvas-soft);
}

.article-content .img-caption {
    font-size: 13px;
    color: var(--muted);
    margin-top: var(--spacing-xs);
    text-align: center;
}

.article-content figure {
    margin: var(--spacing-xl) 0;
}

.article-content figure img {
    border-radius: var(--rounded-md);
    border: 1px solid var(--hairline);
    width: 100%;
}

.article-sidebar {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

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

.sidebar-card__title {
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: var(--spacing-base);
}

.sidebar-card ul li {
    padding: var(--spacing-xs) 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: 1.4;
}

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

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

.page-header__title {
    font-size: 42px;
    font-weight: 400;
    line-height: 1.15;
    letter-spacing: -0.9px;
    color: var(--ink);
    margin-bottom: var(--spacing-base);
}

.page-header__meta {
    font-size: 13px;
    color: var(--muted);
}

.page-content {
    padding: var(--spacing-section) 0;
    max-width: 760px;
}

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

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

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

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

.page-content ul { list-style: disc; }
.page-content ol { list-style: decimal; }

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

.contact-section {
    padding: var(--spacing-section) 0;
    border-top: 1px solid var(--hairline);
}

.contact-section__title {
    font-size: 26px;
    font-weight: 400;
    letter-spacing: -0.325px;
    color: var(--ink);
    margin-bottom: var(--spacing-xl);
}

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

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

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

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

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

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

.form-error {
    font-size: 12px;
    color: var(--semantic-error);
    display: none;
}

.form-group.has-error input,
.form-group.has-error textarea {
    border-color: var(--semantic-error);
}

.form-group.has-error .form-error { display: block; }

.btn-primary {
    background: var(--primary);
    color: var(--on-primary);
    border: none;
    border-radius: var(--rounded-md);
    padding: 10px 18px;
    height: 40px;
    font-family: inherit;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    transition: background 0.15s;
    white-space: nowrap;
}

.btn-primary:hover { background: var(--primary-active); }
.btn-primary:disabled { opacity: 0.6; cursor: not-allowed; }

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

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

.form-feedback {
    display: none;
    padding: var(--spacing-base);
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-left: 3px solid var(--semantic-success);
    border-radius: var(--rounded-md);
    font-size: 14px;
    color: var(--body);
}

.form-feedback.visible { display: block; }

.rh-footer {
    background: var(--canvas);
    border-top: 1px solid var(--hairline);
    padding: var(--spacing-section) 0 var(--spacing-xxl);
}

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

.rh-footer__brand {
    font-size: 15px;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: var(--spacing-sm);
}

.rh-footer__brand span { color: var(--primary); }

.rh-footer__tagline {
    font-size: 13px;
    color: var(--muted);
    line-height: 1.5;
}

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

.rh-footer__col ul li {
    margin-bottom: var(--spacing-xs);
}

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

.rh-footer__col ul li a:hover { color: var(--ink); }

.rh-footer__text {
    font-size: 14px;
    color: var(--body);
    margin-bottom: var(--spacing-xs);
}

.rh-footer__bottom {
    max-width: 1200px;
    margin: var(--spacing-xxl) auto 0;
    padding: var(--spacing-lg) var(--spacing-xl) 0;
    border-top: 1px solid var(--hairline);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

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

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

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

.cookie-banner {
    position: fixed;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
    background: var(--ink);
    color: var(--canvas);
    border-radius: var(--rounded-lg);
    padding: var(--spacing-base) var(--spacing-lg);
    max-width: 640px;
    width: calc(100% - 2 * var(--spacing-xl));
    z-index: 1000;
    display: none;
    box-shadow: 0 4px 24px rgba(38, 37, 30, 0.18);
}

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

.cookie-banner__inner {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.cookie-banner__inner p {
    font-size: 14px;
    color: var(--canvas-soft);
    flex: 1;
    min-width: 200px;
}

.cookie-banner__inner p a {
    color: var(--canvas);
    text-decoration: underline;
    text-underline-offset: 2px;
}

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

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

.cookie-banner .btn-secondary {
    background: transparent;
    color: var(--canvas);
    border-color: rgba(255,255,255,0.3);
}

.cookie-banner .btn-secondary:hover {
    border-color: rgba(255,255,255,0.6);
}

@media (max-width: 1024px) {
    .articles-grid { grid-template-columns: repeat(2, 1fr); }
    .highlights-grid { grid-template-columns: repeat(2, 1fr); }
    .article-layout { grid-template-columns: 1fr; }
    .article-sidebar { display: none; }
    .rh-footer__inner { grid-template-columns: repeat(2, 1fr); gap: var(--spacing-xl); }
}

@media (max-width: 768px) {
    .hero__title { font-size: 36px; letter-spacing: -0.8px; }
    .section__title { font-size: 28px; }
    .article-hero__title { font-size: 30px; }
    .page-header__title { font-size: 30px; }
    .rh-nav__links {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: var(--canvas);
        border-bottom: 1px solid var(--hairline);
        flex-direction: column;
        padding: var(--spacing-base) var(--spacing-xl);
        gap: 0;
    }
    .rh-nav__links.open { display: flex; }
    .rh-nav__links li a {
        display: block;
        padding: var(--spacing-sm) 0;
        border-bottom: 1px solid var(--hairline-soft);
    }
    .rh-nav__burger { display: flex; }
    .rh-nav { position: relative; }
    .articles-grid { grid-template-columns: 1fr; }
    .highlights-grid { grid-template-columns: 1fr; }
    .rh-footer__inner { grid-template-columns: 1fr; gap: var(--spacing-xl); }
    .rh-footer__bottom { flex-direction: column; align-items: flex-start; }
    .container { padding: 0 var(--spacing-base); }
    .hero { padding: var(--spacing-xxl) 0; }
    .section { padding: var(--spacing-xxl) 0; }
}

@media (max-width: 640px) {
    .hero__title { font-size: 28px; }
    .hero__desc { font-size: 16px; }
}