@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: #5a5852;
    --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 {
    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;
    line-height: 1.5;
}

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

h1 {
    font-size: 72px;
    font-weight: 400;
    line-height: 1.1;
    letter-spacing: -2.16px;
    color: var(--ink);
}

h2 {
    font-size: 36px;
    font-weight: 400;
    line-height: 1.2;
    letter-spacing: -0.72px;
    color: var(--ink);
}

h3 {
    font-size: 26px;
    font-weight: 400;
    line-height: 1.25;
    letter-spacing: -0.325px;
    color: var(--ink);
}

h4 {
    font-size: 22px;
    font-weight: 400;
    line-height: 1.3;
    letter-spacing: -0.11px;
    color: var(--ink);
}

p {
    color: var(--body);
    line-height: 1.5;
}

a {
    color: var(--ink);
    text-decoration: none;
}

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

code, pre {
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
}

.site-nav {
    background: var(--canvas);
    border-bottom: 1px solid var(--hairline);
    height: 64px;
    display: flex;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

.nav-logo {
    font-size: 15px;
    font-weight: 600;
    color: var(--ink);
    letter-spacing: 0;
    white-space: nowrap;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 28px;
    list-style: none;
}

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

.nav-links a:hover {
    color: var(--muted);
}

.nav-hamburger {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    flex-direction: column;
    gap: 4px;
}

.nav-hamburger span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--ink);
}

.nav-mobile {
    display: none;
    background: var(--canvas);
    border-bottom: 1px solid var(--hairline);
    padding: 8px 0 16px;
}

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

.nav-mobile ul {
    list-style: none;
    padding: 0 24px;
}

.nav-mobile ul li {
    border-bottom: 1px solid var(--hairline-soft);
}

.nav-mobile ul li a {
    display: block;
    padding: 12px 0;
    font-size: 14px;
    font-weight: 500;
    color: var(--ink);
}

section {
    padding: 80px 0;
}

.hero {
    padding: 96px 0 80px;
}

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

.hero-label {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 24px;
}

.hero-description {
    font-size: 18px;
    line-height: 1.6;
    max-width: 640px;
    margin-top: 24px;
    color: var(--body);
}

.hero-image {
    margin-top: 64px;
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--hairline);
}

.hero-image img {
    width: 100%;
    height: 480px;
    object-fit: cover;
    display: block;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 40px;
}

.article-card {
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: 12px;
    overflow: hidden;
    text-decoration: none;
    display: flex;
    flex-direction: column;
}

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

.article-card-img {
    width: 100%;
    height: 210px;
    object-fit: cover;
    display: block;
}

.article-card-body {
    padding: 24px;
    flex: 1;
}

.article-card-label {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 10px;
}

.article-card-title {
    font-size: 22px;
    font-weight: 400;
    line-height: 1.3;
    letter-spacing: -0.11px;
    color: var(--ink);
    margin-bottom: 12px;
}

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

.intro-band {
    background: var(--canvas-soft);
    border-top: 1px solid var(--hairline);
    border-bottom: 1px solid var(--hairline);
}

.intro-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: start;
}

.intro-grid h2 {
    margin-bottom: 24px;
}

.intro-grid p {
    margin-bottom: 16px;
    font-size: 16px;
    color: var(--body);
}

.intro-features {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.intro-feature {
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: 12px;
    padding: 20px 24px;
}

.intro-feature h4 {
    font-size: 16px;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 8px;
}

.intro-feature p {
    font-size: 14px;
    color: var(--body);
    margin: 0;
}

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

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 64px;
    align-items: start;
}

.contact-info h2 {
    margin-bottom: 16px;
}

.contact-info p {
    font-size: 15px;
    color: var(--body);
    margin-bottom: 12px;
}

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

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

.form-group input,
.form-group textarea {
    width: 100%;
    background: var(--surface-card);
    color: var(--ink);
    font-size: 16px;
    padding: 12px 16px;
    border: 1px solid var(--hairline);
    border-radius: 8px;
    outline: none;
    font-family: inherit;
}

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

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

.form-group input {
    height: 44px;
}

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

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.btn-primary {
    background: var(--primary);
    color: var(--on-primary);
    font-size: 14px;
    font-weight: 500;
    padding: 0 18px;
    height: 40px;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    font-family: inherit;
    display: inline-flex;
    align-items: center;
}

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

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

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

.form-message.success {
    background: #e8f5f0;
    color: var(--success);
    border: 1px solid #b3dece;
    display: block;
}

.article-header {
    padding: 64px 0 48px;
    border-bottom: 1px solid var(--hairline);
}

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

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

.article-breadcrumb span {
    color: var(--muted-soft);
}

.article-meta {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-top: 20px;
    font-size: 13px;
    color: var(--muted);
}

.article-content {
    padding: 64px 0 80px;
}

.article-layout {
    display: grid;
    grid-template-columns: 720px 1fr;
    gap: 64px;
    align-items: start;
}

.article-body h2 {
    font-size: 26px;
    font-weight: 400;
    line-height: 1.25;
    letter-spacing: -0.325px;
    color: var(--ink);
    margin: 48px 0 16px;
}

.article-body h3 {
    font-size: 20px;
    font-weight: 500;
    line-height: 1.35;
    letter-spacing: 0;
    color: var(--ink);
    margin: 32px 0 12px;
}

.article-body p {
    font-size: 16px;
    color: var(--body);
    line-height: 1.65;
    margin-bottom: 20px;
}

.article-body ul,
.article-body ol {
    margin: 0 0 20px 20px;
    color: var(--body);
}

.article-body li {
    margin-bottom: 10px;
    line-height: 1.6;
    font-size: 16px;
}

.article-body img {
    width: 100%;
    border-radius: 12px;
    border: 1px solid var(--hairline);
    margin: 32px 0 8px;
    display: block;
}

.img-caption {
    font-size: 13px;
    color: var(--muted);
    margin-bottom: 32px;
    line-height: 1.4;
}

.reference-box {
    background: var(--canvas-soft);
    border: 1px solid var(--hairline);
    border-radius: 8px;
    padding: 20px 24px;
    margin: 32px 0;
}

.reference-box p {
    font-size: 14px;
    color: var(--muted);
    margin-bottom: 8px;
    line-height: 1.5;
}

.reference-box p:last-child {
    margin-bottom: 0;
}

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

.step-list {
    list-style: none;
    margin: 0 0 24px;
    padding: 0;
}

.step-list > li {
    display: flex;
    gap: 16px;
    margin-bottom: 20px;
    align-items: flex-start;
}

.step-num {
    min-width: 28px;
    height: 28px;
    background: var(--surface-strong);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 600;
    color: var(--ink);
    flex-shrink: 0;
    margin-top: 3px;
}

.step-content strong {
    display: block;
    font-size: 15px;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 4px;
}

.step-content p {
    font-size: 15px;
    margin: 0;
    color: var(--body);
}

.article-sidebar {
    position: sticky;
    top: 84px;
}

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

.sidebar-card h4 {
    font-size: 14px;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 16px;
    letter-spacing: 0.08px;
}

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

.sidebar-card ul li {
    padding: 8px 0;
    border-bottom: 1px solid var(--hairline-soft);
    font-size: 14px;
}

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

.sidebar-card ul li a {
    color: var(--body);
    font-size: 14px;
}

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

.badge-pill {
    display: inline-flex;
    align-items: center;
    background: var(--surface-strong);
    color: var(--ink);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    border-radius: 9999px;
    padding: 4px 10px;
}

.page-header {
    padding: 64px 0 48px;
    border-bottom: 1px solid var(--hairline);
}

.page-header h1 {
    font-size: 48px;
    letter-spacing: -1.2px;
    margin-top: 16px;
}

.page-content {
    padding: 64px 0 80px;
}

.page-body {
    max-width: 720px;
}

.page-body h2 {
    font-size: 26px;
    margin: 40px 0 14px;
}

.page-body h3 {
    font-size: 20px;
    font-weight: 500;
    margin: 28px 0 10px;
    color: var(--ink);
}

.page-body p {
    margin-bottom: 18px;
    font-size: 16px;
    color: var(--body);
    line-height: 1.65;
}

.page-body ul, .page-body ol {
    margin: 0 0 18px 20px;
    color: var(--body);
}

.page-body li {
    margin-bottom: 8px;
    font-size: 16px;
    line-height: 1.6;
}

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

.site-footer {
    background: 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 .nav-logo {
    display: inline-block;
    margin-bottom: 12px;
}

.footer-brand p {
    font-size: 14px;
    color: var(--muted);
    max-width: 220px;
    line-height: 1.6;
}

.footer-col h4 {
    font-size: 13px;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 16px;
}

.footer-col ul {
    list-style: none;
    padding: 0;
}

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

.footer-col ul li a {
    font-size: 14px;
    color: var(--body);
}

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

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

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

.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--surface-card);
    border-top: 1px solid var(--hairline);
    padding: 20px 24px;
    display: none;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    z-index: 9999;
}

.cookie-banner.show {
    display: flex;
}

.cookie-banner p {
    font-size: 14px;
    color: var(--body);
    margin: 0;
    max-width: 800px;
}

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

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

.btn-cookie-accept {
    background: var(--ink);
    color: var(--canvas);
    font-size: 14px;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    font-family: inherit;
}

.btn-cookie-reject {
    background: var(--surface-card);
    color: var(--body);
    font-size: 14px;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: 8px;
    border: 1px solid var(--hairline-strong);
    cursor: pointer;
    font-family: inherit;
}

.related-articles {
    border-top: 1px solid var(--hairline);
    padding: 64px 0;
    background: var(--canvas-soft);
}

@media (max-width: 1100px) {
    .article-layout {
        grid-template-columns: 1fr;
    }
    .article-sidebar {
        position: static;
    }
}

@media (max-width: 1024px) {
    h1 { font-size: 52px; letter-spacing: -1.4px; }
    .card-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
    .intro-grid { grid-template-columns: 1fr; gap: 40px; }
    .contact-grid { grid-template-columns: 1fr; gap: 40px; }
}

@media (max-width: 768px) {
    h1 { font-size: 36px; letter-spacing: -0.8px; }
    h2 { font-size: 28px; letter-spacing: -0.4px; }
    h3 { font-size: 22px; }
    .page-header h1 { font-size: 32px; }

    .nav-links { display: none; }
    .nav-hamburger { display: flex; }

    .hero { padding: 48px 0 64px; }
    .hero-image img { height: 280px; }
    .hero-description { font-size: 16px; }

    .card-grid { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; }

    section { padding: 64px 0; }

    .cookie-banner { flex-direction: column; align-items: flex-start; }
    .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
}

@media (max-width: 640px) {
    h1 { font-size: 28px; letter-spacing: -0.4px; }
    .container { padding: 0 16px; }
    .footer-grid { grid-template-columns: 1fr; }
    .footer-brand p { max-width: 100%; }
}