@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;
    --ink: #26251e;
    --body-color: #5a5852;
    --body-strong: #26251e;
    --muted: #807d72;
    --muted-soft: #a09c92;
    --primary: #f54e00;
    --primary-active: #d04200;
    --on-primary: #ffffff;
    --hairline: #e6e5e0;
    --hairline-soft: #efeee8;
    --hairline-strong: #cfcdc4;
    --success: #1f8a65;
    --error: #cf2d56;
}

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

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

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

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

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

.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

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

.site-logo span {
    color: var(--primary);
}

.site-nav {
    display: flex;
    align-items: center;
    gap: 32px;
}

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

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

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

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

.mobile-nav {
    display: none;
    background-color: var(--canvas);
    border-bottom: 1px solid var(--hairline);
    padding: 16px 24px;
}

.mobile-nav.is-open {
    display: block;
}

.mobile-nav a {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--ink);
    padding: 10px 0;
    border-bottom: 1px solid var(--hairline-soft);
}

.mobile-nav a:last-child {
    border-bottom: none;
}

.hero-band {
    padding: 80px 0;
    background-color: var(--canvas);
    border-bottom: 1px solid var(--hairline);
}

.hero-band .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.hero-content {}

.hero-label {
    display: inline-block;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    color: var(--ink);
    background-color: var(--surface-strong);
    padding: 4px 10px;
    border-radius: 9999px;
    margin-bottom: 24px;
}

.hero-title {
    font-size: 56px;
    font-weight: 400;
    line-height: 1.1;
    letter-spacing: -1.5px;
    color: var(--ink);
    margin-bottom: 20px;
}

.hero-desc {
    font-size: 16px;
    font-weight: 400;
    line-height: 1.5;
    color: var(--body-color);
    margin-bottom: 0;
}

.hero-image-wrap {
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--hairline);
    background-color: var(--surface-card);
}

.hero-image-wrap img {
    width: 100%;
    height: 360px;
    object-fit: cover;
}

.section {
    padding: 80px 0;
}

.section-label {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 12px;
}

.section-title {
    font-size: 36px;
    font-weight: 400;
    line-height: 1.2;
    letter-spacing: -0.72px;
    color: var(--ink);
    margin-bottom: 48px;
}

.section-title-sm {
    font-size: 26px;
    font-weight: 400;
    line-height: 1.25;
    letter-spacing: -0.325px;
    color: var(--ink);
    margin-bottom: 32px;
}

.articles-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.article-card {
    background-color: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: 12px;
    overflow: hidden;
    transition: border-color 0.15s;
}

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

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

.article-card-body {
    padding: 24px;
}

.article-card-tag {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 12px;
}

.article-card-title {
    font-size: 18px;
    font-weight: 600;
    line-height: 1.4;
    color: var(--ink);
    margin-bottom: 12px;
}

.article-card-excerpt {
    font-size: 14px;
    font-weight: 400;
    line-height: 1.5;
    color: var(--body-color);
    margin-bottom: 20px;
}

.article-card-link {
    font-size: 14px;
    font-weight: 500;
    color: var(--primary);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

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

.article-card-link::after {
    content: '→';
}

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

.article-hero {
    padding: 60px 0 48px;
    background-color: var(--canvas);
    border-bottom: 1px solid var(--hairline);
}

.article-breadcrumb {
    font-size: 13px;
    color: var(--muted);
    margin-bottom: 20px;
}

.article-breadcrumb a {
    color: var(--muted);
    transition: color 0.15s;
}

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

.article-breadcrumb span {
    margin: 0 6px;
}

.article-tag {
    display: inline-block;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    color: var(--ink);
    background-color: var(--surface-strong);
    padding: 4px 10px;
    border-radius: 9999px;
    margin-bottom: 16px;
}

.article-title {
    font-size: 46px;
    font-weight: 400;
    line-height: 1.1;
    letter-spacing: -1px;
    color: var(--ink);
    margin-bottom: 20px;
    max-width: 820px;
}

.article-meta {
    font-size: 13px;
    color: var(--muted);
    display: flex;
    align-items: center;
    gap: 16px;
}

.article-layout {
    padding: 64px 0;
}

.article-layout .container {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 64px;
    align-items: start;
}

.article-content {
    min-width: 0;
}

.article-content .article-img {
    width: 100%;
    border-radius: 12px;
    border: 1px solid var(--hairline);
    margin-bottom: 36px;
    height: 420px;
    object-fit: cover;
}

.article-content h2 {
    font-size: 26px;
    font-weight: 400;
    line-height: 1.25;
    letter-spacing: -0.325px;
    color: var(--ink);
    margin-top: 48px;
    margin-bottom: 16px;
}

.article-content h3 {
    font-size: 18px;
    font-weight: 600;
    line-height: 1.4;
    color: var(--ink);
    margin-top: 32px;
    margin-bottom: 12px;
}

.article-content p {
    font-size: 16px;
    font-weight: 400;
    line-height: 1.6;
    color: var(--body-color);
    margin-bottom: 20px;
}

.article-content ul,
.article-content ol {
    padding-left: 24px;
    margin-bottom: 20px;
}

.article-content li {
    font-size: 16px;
    line-height: 1.6;
    color: var(--body-color);
    margin-bottom: 8px;
}

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

.article-content .data-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 32px;
    font-size: 14px;
}

.article-content .data-table th {
    text-align: left;
    font-weight: 600;
    font-size: 11px;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    color: var(--muted);
    padding: 10px 16px;
    border-bottom: 1px solid var(--hairline);
    background-color: var(--canvas-soft);
}

.article-content .data-table td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--hairline-soft);
    color: var(--body-color);
}

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

.info-box {
    background-color: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 32px;
}

.info-box-label {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 12px;
}

.info-box p {
    margin-bottom: 0;
}

.code-block {
    background-color: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 28px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
    line-height: 1.5;
    color: var(--ink);
    overflow-x: auto;
}

.article-sidebar {}

.sidebar-card {
    background-color: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 24px;
    position: sticky;
    top: 80px;
}

.sidebar-card-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 16px;
}

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

.sidebar-toc li {
    margin-bottom: 0;
}

.sidebar-toc a {
    display: block;
    font-size: 14px;
    color: var(--body-color);
    padding: 8px 0;
    border-bottom: 1px solid var(--hairline-soft);
    transition: color 0.15s;
}

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

.sidebar-toc li:last-child a {
    border-bottom: none;
}

.related-articles {}

.related-article-link {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--ink);
    padding: 10px 0;
    border-bottom: 1px solid var(--hairline-soft);
    transition: color 0.15s;
}

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

.related-article-link:last-child {
    border-bottom: none;
}

.page-hero {
    padding: 60px 0;
    background-color: var(--canvas);
    border-bottom: 1px solid var(--hairline);
}

.page-title {
    font-size: 46px;
    font-weight: 400;
    line-height: 1.1;
    letter-spacing: -1px;
    color: var(--ink);
    margin-bottom: 16px;
}

.page-desc {
    font-size: 16px;
    color: var(--body-color);
    max-width: 600px;
}

.page-content {
    padding: 64px 0;
}

.page-content h2 {
    font-size: 26px;
    font-weight: 400;
    letter-spacing: -0.325px;
    color: var(--ink);
    margin-top: 48px;
    margin-bottom: 16px;
}

.page-content h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--ink);
    margin-top: 28px;
    margin-bottom: 12px;
}

.page-content p {
    font-size: 16px;
    line-height: 1.6;
    color: var(--body-color);
    margin-bottom: 20px;
    max-width: 760px;
}

.page-content ul,
.page-content ol {
    padding-left: 24px;
    margin-bottom: 20px;
    max-width: 760px;
}

.page-content li {
    font-size: 16px;
    line-height: 1.6;
    color: var(--body-color);
    margin-bottom: 8px;
}

.contact-form-wrap {
    background-color: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: 12px;
    padding: 32px;
    max-width: 560px;
    margin-top: 48px;
}

.form-title {
    font-size: 22px;
    font-weight: 400;
    letter-spacing: -0.11px;
    color: var(--ink);
    margin-bottom: 24px;
}

.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--ink);
    margin-bottom: 8px;
}

.form-input {
    width: 100%;
    background-color: var(--surface-card);
    color: var(--ink);
    border: 1px solid var(--hairline-strong);
    border-radius: 8px;
    padding: 12px 16px;
    height: 44px;
    font-size: 16px;
    font-family: inherit;
    transition: border-color 0.15s;
    outline: none;
}

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

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

.form-submit {
    background-color: var(--primary);
    color: var(--on-primary);
    border: none;
    border-radius: 8px;
    padding: 10px 18px;
    height: 40px;
    font-size: 14px;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    transition: background-color 0.15s;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.form-submit:hover {
    background-color: var(--primary-active);
}

.form-submit:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.form-message {
    margin-top: 16px;
    font-size: 14px;
    padding: 12px 16px;
    border-radius: 8px;
    display: none;
}

.form-message.success {
    background-color: #e8f5f0;
    color: var(--success);
    border: 1px solid #b8ddd0;
    display: block;
}

.form-message.error {
    background-color: #fdeaee;
    color: var(--error);
    border: 1px solid #f5c0cc;
    display: block;
}

.site-footer {
    background-color: var(--canvas);
    border-top: 1px solid var(--hairline);
    padding: 64px 0 48px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 48px;
}

.footer-brand-name {
    font-size: 16px;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 12px;
}

.footer-brand-desc {
    font-size: 14px;
    color: var(--muted);
    line-height: 1.6;
    max-width: 260px;
}

.footer-col-title {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 16px;
}

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

.footer-links li {
    margin-bottom: 10px;
}

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

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

.footer-bottom {
    border-top: 1px solid var(--hairline);
    padding-top: 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

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

.footer-legal {
    display: flex;
    gap: 24px;
}

.footer-legal a {
    font-size: 14px;
    color: var(--muted);
    transition: color 0.15s;
}

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

.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: var(--surface-card);
    border-top: 1px solid var(--hairline);
    padding: 20px 24px;
    z-index: 200;
    display: none;
}

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

.cookie-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.cookie-text {
    font-size: 14px;
    color: var(--body-color);
    line-height: 1.5;
    max-width: 720px;
}

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

.cookie-actions {
    display: flex;
    gap: 12px;
    flex-shrink: 0;
}

.btn-cookie-accept {
    background-color: var(--ink);
    color: var(--canvas);
    border: none;
    border-radius: 8px;
    padding: 10px 18px;
    height: 40px;
    font-size: 14px;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    transition: opacity 0.15s;
}

.btn-cookie-accept:hover {
    opacity: 0.85;
}

.btn-cookie-reject {
    background-color: transparent;
    color: var(--ink);
    border: 1px solid var(--hairline-strong);
    border-radius: 8px;
    padding: 10px 18px;
    height: 40px;
    font-size: 14px;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    transition: border-color 0.15s;
}

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

.source-list {
    list-style: none;
    padding: 0;
    margin-bottom: 0;
}

.source-list li {
    padding: 10px 0;
    border-bottom: 1px solid var(--hairline-soft);
    font-size: 14px;
    color: var(--body-color);
}

.source-list li:last-child {
    border-bottom: none;
}

.source-list a {
    color: var(--ink);
    text-decoration: underline;
    text-underline-offset: 2px;
}

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

.img-caption {
    font-size: 13px;
    color: var(--muted);
    margin-top: 8px;
    line-height: 1.4;
}

@media (max-width: 1023px) {
    .hero-band .container {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .hero-title {
        font-size: 42px;
    }

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

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

    .article-sidebar {
        display: none;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }

    .article-title {
        font-size: 36px;
    }
}

@media (max-width: 767px) {
    .site-nav {
        display: none;
    }

    .nav-hamburger {
        display: flex;
    }

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

    .hero-band {
        padding: 48px 0;
    }

    .section {
        padding: 48px 0;
    }

    .section-title {
        font-size: 28px;
    }

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

    .article-title {
        font-size: 28px;
        letter-spacing: -0.5px;
    }

    .page-title {
        font-size: 32px;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
    }

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

    .contact-form-wrap {
        padding: 24px;
    }
}