@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 {
    --canvas: #f7f7f4;
    --canvas-soft: #fafaf7;
    --surface-card: #ffffff;
    --surface-strong: #e6e5e0;
    --primary: #f54e00;
    --primary-active: #d04200;
    --ink: #26251e;
    --body: #5a5852;
    --body-strong: #26251e;
    --muted: #807d72;
    --muted-soft: #a09c92;
    --on-primary: #ffffff;
    --hairline: #e6e5e0;
    --hairline-soft: #efeee8;
    --hairline-strong: #cfcdc4;
    --success: #1f8a65;
    --error: #cf2d56;
    --rounded-xs: 4px;
    --rounded-sm: 6px;
    --rounded-md: 8px;
    --rounded-lg: 12px;
    --rounded-xl: 16px;
    --rounded-pill: 9999px;
    --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(--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;
    -webkit-font-smoothing: antialiased;
}

a {
    color: inherit;
    text-decoration: none;
}

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

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

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

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

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

.wordmark {
    font-size: 18px;
    font-weight: 600;
    color: var(--ink);
    letter-spacing: -0.3px;
    line-height: 1;
}

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

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

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

.primary-nav a:hover,
.primary-nav a.active {
    color: var(--ink);
}

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

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

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

.hero-band h1 {
    font-size: 72px;
    font-weight: 400;
    line-height: 1.1;
    letter-spacing: -2.16px;
    color: var(--ink);
    max-width: 820px;
    margin-bottom: var(--spacing-lg);
}

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

.hero-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-base);
    margin-bottom: var(--spacing-section);
}

.badge-pill {
    display: inline-flex;
    align-items: center;
    background-color: var(--surface-strong);
    color: var(--ink);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    border-radius: var(--rounded-pill);
    padding: 4px 10px;
    line-height: 1.4;
}

.hero-image-wrap {
    border-radius: var(--rounded-lg);
    overflow: hidden;
    border: 1px solid var(--hairline);
    background-color: var(--surface-card);
    aspect-ratio: 16/7;
}

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

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

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

.section-sub {
    font-size: 16px;
    line-height: 1.5;
    color: var(--body);
    max-width: 600px;
    margin-bottom: var(--spacing-xxl);
}

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

.content-band + .content-band {
    border-top: 1px solid var(--hairline-soft);
}

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

.article-card {
    background-color: 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 {
    aspect-ratio: 16/9;
    overflow: hidden;
    background-color: var(--surface-strong);
}

.article-card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s;
}

.article-card:hover .article-card-img img {
    transform: scale(1.03);
}

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

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

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

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

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

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

.article-card-link::after {
    content: '→';
    transition: transform 0.15s;
}

.article-card:hover .article-card-link::after {
    transform: translateX(3px);
}

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

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

.feature-card-icon {
    width: 40px;
    height: 40px;
    background-color: var(--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(--ink);
    line-height: 1.4;
    margin-bottom: var(--spacing-xs);
}

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

.two-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-section);
    align-items: center;
}

.two-col-text h2 {
    font-size: 36px;
    font-weight: 400;
    line-height: 1.2;
    letter-spacing: -0.72px;
    color: var(--ink);
    margin-bottom: var(--spacing-base);
}

.two-col-text p {
    font-size: 16px;
    line-height: 1.5;
    color: var(--body);
    margin-bottom: var(--spacing-base);
}

.two-col-text p:last-child {
    margin-bottom: 0;
}

.two-col-img {
    border-radius: var(--rounded-lg);
    overflow: hidden;
    border: 1px solid var(--hairline);
    aspect-ratio: 4/3;
}

.two-col-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.cta-band {
    padding: 96px 0;
    background-color: var(--canvas);
    border-top: 1px solid var(--hairline-soft);
    text-align: center;
}

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

.cta-band p {
    font-size: 16px;
    color: var(--body);
    max-width: 500px;
    margin: 0 auto var(--spacing-xxl);
}

.contact-form-wrap {
    max-width: 560px;
    margin: 0 auto;
    background-color: var(--surface-card);
    border: 1px solid var(--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(--ink);
    margin-bottom: 6px;
}

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

.form-group textarea {
    height: auto;
    min-height: 100px;
    resize: vertical;
}

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

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

.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background-color: var(--primary);
    color: var(--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;
    font-family: inherit;
}

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

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

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

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

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

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

.form-feedback.success {
    background-color: #e8f5f0;
    color: var(--success);
    border: 1px solid #b8e0d4;
    display: block;
}

.form-feedback.error {
    background-color: #fde8ed;
    color: var(--error);
    border: 1px solid #f0bdc9;
    display: block;
}

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

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

.footer-brand .wordmark {
    margin-bottom: var(--spacing-sm);
}

.footer-brand p {
    font-size: 14px;
    line-height: 1.5;
    color: var(--body);
    max-width: 240px;
}

.footer-col h4 {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    color: var(--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(--body);
    transition: color 0.15s;
}

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

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

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

.footer-bottom-links {
    display: flex;
    gap: var(--spacing-lg);
    list-style: none;
}

.footer-bottom-links a {
    font-size: 13px;
    color: var(--muted);
    transition: color 0.15s;
}

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

.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: var(--ink);
    color: var(--canvas);
    padding: var(--spacing-base) var(--spacing-xl);
    z-index: 999;
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
    justify-content: space-between;
    border-top: 1px solid var(--hairline-strong);
}

.cookie-banner p {
    font-size: 14px;
    line-height: 1.5;
    color: var(--canvas);
    max-width: 700px;
}

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

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

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

.btn-cookie-reject {
    background-color: transparent;
    color: var(--canvas);
    font-size: 13px;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: var(--rounded-md);
    border: 1px solid rgba(255,255,255,0.3);
    cursor: pointer;
    font-family: inherit;
}

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

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

.article-main h1 {
    font-size: 42px;
    font-weight: 400;
    letter-spacing: -1px;
    color: var(--ink);
    line-height: 1.15;
    margin-bottom: var(--spacing-lg);
}

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

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

.article-meta .sep {
    color: var(--hairline-strong);
}

.article-img-hero {
    border-radius: var(--rounded-lg);
    overflow: hidden;
    border: 1px solid var(--hairline);
    margin-bottom: var(--spacing-xxl);
    aspect-ratio: 16/7;
}

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

.article-body {
    font-size: 16px;
    line-height: 1.7;
    color: var(--body);
}

.article-body h2 {
    font-size: 26px;
    font-weight: 400;
    letter-spacing: -0.325px;
    color: var(--ink);
    line-height: 1.25;
    margin: var(--spacing-xxl) 0 var(--spacing-base);
}

.article-body h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--ink);
    line-height: 1.4;
    margin: var(--spacing-xl) 0 var(--spacing-sm);
}

.article-body p {
    margin-bottom: var(--spacing-base);
}

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

.article-body li {
    margin-bottom: 6px;
}

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

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

.info-box {
    background-color: var(--surface-card);
    border: 1px solid var(--hairline);
    border-left: 3px solid var(--primary);
    border-radius: 0 var(--rounded-md) var(--rounded-md) 0;
    padding: var(--spacing-base) var(--spacing-lg);
    margin: var(--spacing-xl) 0;
    font-size: 15px;
}

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

.article-img-inline {
    border-radius: var(--rounded-lg);
    overflow: hidden;
    border: 1px solid var(--hairline);
    margin: var(--spacing-xl) 0;
}

.article-img-inline img {
    width: 100%;
    height: auto;
    max-height: 360px;
    object-fit: cover;
}

.article-img-inline figcaption {
    padding: var(--spacing-sm) var(--spacing-base);
    font-size: 13px;
    color: var(--muted);
    border-top: 1px solid var(--hairline-soft);
    background-color: var(--canvas-soft);
}

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

.sidebar-card {
    background-color: var(--surface-card);
    border: 1px solid var(--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(--muted);
    margin-bottom: var(--spacing-base);
}

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

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

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

.sidebar-related ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-base);
}

.sidebar-related li {
    padding-bottom: var(--spacing-base);
    border-bottom: 1px solid var(--hairline-soft);
}

.sidebar-related li:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

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

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

.breadcrumb {
    padding: var(--spacing-base) 0;
    border-bottom: 1px solid var(--hairline-soft);
    margin-bottom: 0;
}

.breadcrumb ol {
    list-style: none;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

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

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

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

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

.page-layout {
    padding: var(--spacing-section) 0;
    max-width: 800px;
    margin: 0 auto;
}

.page-layout h1 {
    font-size: 42px;
    font-weight: 400;
    letter-spacing: -1px;
    color: var(--ink);
    line-height: 1.15;
    margin-bottom: var(--spacing-base);
}

.page-layout .page-sub {
    font-size: 16px;
    color: var(--muted);
    margin-bottom: var(--spacing-xxl);
    padding-bottom: var(--spacing-xxl);
    border-bottom: 1px solid var(--hairline-soft);
}

.page-layout h2 {
    font-size: 22px;
    font-weight: 400;
    letter-spacing: -0.11px;
    color: var(--ink);
    margin: var(--spacing-xxl) 0 var(--spacing-base);
}

.page-layout h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--ink);
    margin: var(--spacing-xl) 0 var(--spacing-sm);
}

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

.page-layout ul {
    padding-left: var(--spacing-xl);
    margin-bottom: var(--spacing-base);
    color: var(--body);
}

.page-layout li {
    font-size: 16px;
    line-height: 1.7;
    margin-bottom: 6px;
}

.disclaimer-box {
    background-color: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: var(--rounded-md);
    padding: var(--spacing-base) var(--spacing-lg);
    font-size: 13px;
    color: var(--muted);
    line-height: 1.6;
    margin-bottom: var(--spacing-xl);
}

@media (max-width: 1024px) {
    .hero-band h1 {
        font-size: 56px;
        letter-spacing: -1.5px;
    }
    .footer-inner {
        grid-template-columns: 1fr 1fr 1fr;
    }
    .article-layout .container {
        grid-template-columns: 1fr;
    }
    .article-sidebar {
        position: static;
    }
}

@media (max-width: 768px) {
    .primary-nav {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background-color: var(--canvas);
        border-bottom: 1px solid var(--hairline);
        flex-direction: column;
        align-items: flex-start;
        padding: var(--spacing-base) var(--spacing-xl);
        gap: var(--spacing-base);
    }
    .primary-nav.open {
        display: flex;
    }
    .nav-toggle {
        display: flex;
    }
    .hero-band h1 {
        font-size: 36px;
        letter-spacing: -0.5px;
    }
    .articles-grid {
        grid-template-columns: 1fr;
    }
    .feature-grid {
        grid-template-columns: 1fr;
    }
    .two-col {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    .footer-inner {
        grid-template-columns: 1fr 1fr;
    }
    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-base);
        align-items: flex-start;
    }
    .cookie-banner {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-base);
    }
    .page-layout {
        padding: var(--spacing-xxl) 0;
    }
    .page-layout h1 {
        font-size: 30px;
    }
    .article-main h1 {
        font-size: 28px;
    }
}

@media (max-width: 640px) {
    .articles-grid {
        grid-template-columns: 1fr;
    }
    .container {
        padding: 0 var(--spacing-base);
    }
    .hero-band {
        padding: var(--spacing-xxl) 0;
    }
    .content-band {
        padding: var(--spacing-xxl) 0;
    }
}