*, *::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;
    --on-primary: #ffffff;
    --ink: #26251e;
    --body: #5a5852;
    --body-strong: #26251e;
    --muted: #807d72;
    --muted-soft: #a09c92;
    --hairline: #e6e5e0;
    --hairline-soft: #efeee8;
    --hairline-strong: #cfcdc4;
    --semantic-success: #1f8a65;
    --semantic-error: #cf2d56;
    --rounded-xs: 4px;
    --rounded-sm: 6px;
    --rounded-md: 8px;
    --rounded-lg: 12px;
    --rounded-xl: 16px;
    --rounded-pill: 9999px;
    --font-body: 'Inter', system-ui, 'Helvetica Neue', Helvetica, Arial, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --section: 80px;
}

html { scroll-behavior: smooth; }

body {
    font-family: var(--font-body);
    font-size: 16px;
    font-weight: 400;
    line-height: 1.5;
    color: var(--body);
    background-color: var(--canvas);
    -webkit-font-smoothing: antialiased;
}

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

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

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

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    height: 64px;
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-logo {
    font-size: 18px;
    font-weight: 600;
    color: var(--ink);
    letter-spacing: -0.11px;
    white-space: nowrap;
    flex-shrink: 0;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-left: auto;
    flex-wrap: wrap;
}

.nav-item--has-dropdown {
    position: relative;
}

.nav-item--has-dropdown:hover .nav-dropdown,
.nav-item--has-dropdown:focus-within .nav-dropdown {
    display: block;
}

.nav-dropdown {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: var(--rounded-lg);
    min-width: 240px;
    padding: 8px 0;
    box-shadow: 0 4px 16px rgba(38,37,30,0.08);
    z-index: 200;
}

.nav-dropdown-link {
    display: block;
    padding: 10px 16px;
    font-size: 14px;
    font-weight: 400;
    color: var(--body);
    transition: color 0.15s, background 0.15s;
}

.nav-dropdown-link:hover,
.nav-dropdown-link:focus {
    color: var(--ink);
    background: var(--canvas-soft);
}

.nav-link {
    font-size: 14px;
    font-weight: 500;
    color: var(--body);
    padding: 8px 12px;
    border-radius: var(--rounded-sm);
    transition: color 0.15s;
    white-space: nowrap;
}

.nav-link:hover,
.nav-link:focus { color: var(--ink); }
.nav-link--active { color: var(--ink); }

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

.nav-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--ink);
    border-radius: 2px;
    transition: transform 0.2s, opacity 0.2s;
}

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

.hero-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.hero-label {
    display: inline-block;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    color: var(--muted);
    background: var(--surface-strong);
    border-radius: var(--rounded-pill);
    padding: 4px 10px;
    margin-bottom: 20px;
}

.hero h1 {
    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;
    line-height: 1.6;
    color: var(--body);
    max-width: 480px;
    margin-bottom: 32px;
}

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

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

.hero-image-wrap img {
    width: 100%;
    height: 380px;
    object-fit: cover;
}

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

.section--light {
    background: var(--canvas);
}

.section--card {
    background: var(--canvas-soft);
}

.section-header {
    margin-bottom: 48px;
}

.section-label {
    display: inline-block;
    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;
    letter-spacing: -0.72px;
    line-height: 1.2;
    color: var(--ink);
    margin-bottom: 12px;
}

.section-desc {
    font-size: 16px;
    color: var(--body);
    max-width: 560px;
    line-height: 1.6;
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.card {
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: var(--rounded-lg);
    padding: 24px;
    transition: border-color 0.15s;
}

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

.card-img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: var(--rounded-md);
    margin-bottom: 20px;
}

.card-label {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 8px;
}

.card-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--ink);
    line-height: 1.3;
    margin-bottom: 10px;
}

.card-excerpt {
    font-size: 14px;
    color: var(--body);
    line-height: 1.5;
    margin-bottom: 16px;
}

.card-link {
    font-size: 14px;
    font-weight: 500;
    color: var(--ink);
    border-bottom: 1px solid var(--hairline-strong);
    padding-bottom: 2px;
    transition: border-color 0.15s, color 0.15s;
}

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

.info-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.info-card {
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: var(--rounded-lg);
    padding: 28px;
}

.info-card-title {
    font-size: 22px;
    font-weight: 400;
    letter-spacing: -0.11px;
    color: var(--ink);
    margin-bottom: 12px;
}

.info-card-text {
    font-size: 15px;
    color: var(--body);
    line-height: 1.6;
}

.contact-section {
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: var(--rounded-lg);
    padding: 48px;
    max-width: 640px;
    margin: 0 auto;
}

.contact-section h2 {
    font-size: 26px;
    font-weight: 400;
    letter-spacing: -0.325px;
    color: var(--ink);
    margin-bottom: 8px;
}

.contact-section p {
    font-size: 15px;
    color: var(--body);
    margin-bottom: 32px;
}

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

.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: var(--surface-card);
    border: 1px solid var(--hairline-strong);
    border-radius: var(--rounded-md);
    padding: 12px 16px;
    height: 44px;
    font-family: var(--font-body);
    font-size: 15px;
    color: var(--ink);
    outline: none;
    transition: border-color 0.15s;
}

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

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

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

.form-group .field-error {
    font-size: 13px;
    color: var(--semantic-error);
    margin-top: 4px;
    display: none;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--primary);
    color: var(--on-primary);
    font-family: var(--font-body);
    font-size: 14px;
    font-weight: 500;
    padding: 10px 18px;
    height: 40px;
    border-radius: var(--rounded-md);
    border: none;
    cursor: pointer;
    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 {
    display: inline-flex;
    align-items: center;
    background: var(--surface-card);
    color: var(--ink);
    font-family: var(--font-body);
    font-size: 14px;
    font-weight: 500;
    padding: 10px 18px;
    height: 40px;
    border-radius: var(--rounded-md);
    border: 1px solid var(--hairline-strong);
    cursor: pointer;
    transition: border-color 0.15s;
}

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

.form-status {
    display: none;
    margin-top: 16px;
    padding: 12px 16px;
    border-radius: var(--rounded-md);
    font-size: 14px;
}

.form-status--success {
    background: rgba(31,138,101,0.1);
    border: 1px solid rgba(31,138,101,0.3);
    color: var(--semantic-success);
}

.form-status--loading {
    background: var(--canvas-soft);
    border: 1px solid var(--hairline);
    color: var(--muted);
}

.article-hero {
    padding: 60px 0 40px;
    background: var(--canvas);
    border-bottom: 1px solid var(--hairline-soft);
}

.article-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

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

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

.article-hero h1 {
    font-size: 42px;
    font-weight: 400;
    letter-spacing: -0.72px;
    line-height: 1.15;
    color: var(--ink);
    max-width: 760px;
    margin-bottom: 16px;
}

.article-hero-desc {
    font-size: 18px;
    color: var(--body);
    line-height: 1.6;
    max-width: 640px;
    margin-bottom: 32px;
}

.article-hero-img {
    width: 100%;
    max-height: 460px;
    object-fit: cover;
    border-radius: var(--rounded-lg);
    border: 1px solid var(--hairline);
}

.article-body {
    padding: 60px 0 var(--section);
}

.article-content {
    max-width: 760px;
    margin: 0 auto;
}

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

.article-content h3 {
    font-size: 20px;
    font-weight: 500;
    color: var(--ink);
    margin-top: 32px;
    margin-bottom: 12px;
}

.article-content p {
    font-size: 16px;
    line-height: 1.7;
    color: var(--body);
    margin-bottom: 20px;
}

.article-content ul, .article-content ol {
    margin-bottom: 20px;
    padding-left: 0;
}

.article-content ul li, .article-content ol li {
    font-size: 16px;
    line-height: 1.7;
    color: var(--body);
    margin-bottom: 8px;
    padding-left: 20px;
    position: relative;
}

.article-content ul li::before {
    content: '—';
    position: absolute;
    left: 0;
    color: var(--muted);
}

.article-content ol {
    counter-reset: ol-counter;
}

.article-content ol li {
    counter-increment: ol-counter;
}

.article-content ol li::before {
    content: counter(ol-counter) '.';
    position: absolute;
    left: 0;
    color: var(--muted);
    font-size: 14px;
    font-weight: 500;
}

.article-content blockquote {
    border-left: 3px solid var(--hairline-strong);
    padding: 16px 24px;
    margin: 32px 0;
    background: var(--canvas-soft);
    border-radius: 0 var(--rounded-md) var(--rounded-md) 0;
}

.article-content blockquote p {
    font-size: 17px;
    color: var(--muted);
    font-style: italic;
    margin-bottom: 0;
}

.article-content .info-box {
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: var(--rounded-lg);
    padding: 24px;
    margin: 32px 0;
}

.article-content .info-box h4 {
    font-size: 14px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--muted);
    margin-bottom: 12px;
}

.article-content .info-box p,
.article-content .info-box li {
    font-size: 15px;
}

.article-content a {
    color: var(--ink);
    border-bottom: 1px solid var(--hairline-strong);
    transition: border-color 0.15s;
}

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

.article-content .source-note {
    font-size: 13px;
    color: var(--muted);
    border-top: 1px solid var(--hairline-soft);
    padding-top: 16px;
    margin-top: 40px;
}

.article-sidebar {
    position: sticky;
    top: 88px;
}

.toc {
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: var(--rounded-lg);
    padding: 24px;
    margin-bottom: 24px;
}

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

.toc-list { padding-left: 0; }
.toc-list li { margin-bottom: 8px; }
.toc-list li a {
    font-size: 14px;
    color: var(--body);
    transition: color 0.15s;
}
.toc-list li a:hover { color: var(--ink); }

.article-layout {
    display: grid;
    grid-template-columns: 1fr 280px;
    gap: 48px;
    align-items: start;
}

.related-articles {
    margin-top: 60px;
    padding-top: 40px;
    border-top: 1px solid var(--hairline);
}

.related-articles h3 {
    font-size: 22px;
    font-weight: 400;
    letter-spacing: -0.11px;
    color: var(--ink);
    margin-bottom: 24px;
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.related-card {
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: var(--rounded-lg);
    padding: 20px;
    transition: border-color 0.15s;
}

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

.related-card-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 8px;
    line-height: 1.3;
}

.related-card-text {
    font-size: 13px;
    color: var(--body);
    line-height: 1.5;
}

.page-hero {
    padding: 60px 0 40px;
    border-bottom: 1px solid var(--hairline-soft);
}

.page-hero h1 {
    font-size: 42px;
    font-weight: 400;
    letter-spacing: -0.72px;
    color: var(--ink);
    margin-bottom: 12px;
}

.page-hero p {
    font-size: 16px;
    color: var(--body);
    max-width: 560px;
    line-height: 1.6;
}

.page-body {
    padding: 60px 0 var(--section);
    max-width: 760px;
}

.page-body h2 {
    font-size: 24px;
    font-weight: 400;
    color: var(--ink);
    margin-top: 40px;
    margin-bottom: 12px;
}

.page-body p, .page-body li {
    font-size: 15px;
    color: var(--body);
    line-height: 1.7;
    margin-bottom: 16px;
}

.page-body ul, .page-body ol {
    padding-left: 20px;
}

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

.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--muted);
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.breadcrumb a { color: var(--body); }
.breadcrumb a:hover { color: var(--ink); }
.breadcrumb-sep { color: var(--hairline-strong); }

.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--ink);
    color: var(--canvas);
    padding: 20px 24px;
    z-index: 999;
    display: none;
}

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

.cookie-text {
    flex: 1;
    font-size: 14px;
    line-height: 1.5;
    color: #ccc9be;
    min-width: 240px;
}

.cookie-text a {
    color: var(--canvas);
    border-bottom: 1px solid rgba(247,247,244,0.4);
}

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

.btn-cookie-accept {
    background: var(--primary);
    color: var(--on-primary);
    border: none;
    border-radius: var(--rounded-md);
    padding: 8px 18px;
    height: 36px;
    font-family: var(--font-body);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.15s;
}

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

.btn-cookie-reject {
    background: transparent;
    color: var(--canvas);
    border: 1px solid rgba(247,247,244,0.3);
    border-radius: var(--rounded-md);
    padding: 8px 18px;
    height: 36px;
    font-family: var(--font-body);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: border-color 0.15s;
}

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

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

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 48px;
}

.footer-logo {
    font-size: 18px;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 12px;
}

.footer-tagline {
    font-size: 14px;
    color: var(--muted);
    line-height: 1.5;
    max-width: 200px;
}

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

.footer-links { display: flex; flex-direction: column; gap: 10px; }

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

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

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

.footer-bottom {
    max-width: 1200px;
    margin: 0 auto;
    padding: 24px 24px 0;
    border-top: 1px solid var(--hairline-soft);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
}

.footer-copy, .footer-disclaimer {
    font-size: 13px;
    color: var(--muted);
}

@media (max-width: 1024px) {
    .hero h1 { font-size: 44px; }
    .hero-inner { gap: 40px; }
    .cards-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-container { grid-template-columns: 1fr 1fr; }
    .article-layout { grid-template-columns: 1fr; }
    .article-sidebar { position: static; }
}

@media (max-width: 768px) {
    .nav-toggle { display: flex; }
    .nav-menu {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: var(--canvas);
        border-bottom: 1px solid var(--hairline);
        flex-direction: column;
        align-items: flex-start;
        padding: 16px 24px;
        gap: 4px;
    }
    .nav-menu.is-open { display: flex; }
    .nav-item--has-dropdown { width: 100%; }
    .nav-dropdown {
        position: static;
        box-shadow: none;
        border: none;
        border-left: 2px solid var(--hairline);
        border-radius: 0;
        padding: 4px 0 4px 12px;
        margin-top: 4px;
    }
    .hero-inner { grid-template-columns: 1fr; gap: 40px; }
    .hero h1 { font-size: 36px; }
    .hero-image-wrap { order: -1; }
    .cards-grid { grid-template-columns: 1fr; }
    .info-grid { grid-template-columns: 1fr; }
    .related-grid { grid-template-columns: 1fr; }
    .footer-container { grid-template-columns: 1fr 1fr; }
    .footer-bottom { flex-direction: column; align-items: flex-start; }
    .article-hero h1 { font-size: 32px; }
    .contact-section { padding: 32px 24px; }
    .section-title { font-size: 28px; }
    .page-hero h1 { font-size: 32px; }
}

@media (max-width: 480px) {
    .footer-container { grid-template-columns: 1fr; }
    .cookie-inner { flex-direction: column; align-items: flex-start; }
}