*, *::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;
    --radius-xs: 4px;
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-pill: 9999px;
}

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;
}

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

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

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

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

.nav-wordmark {
    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;
    flex-wrap: wrap;
}

.nav-link {
    font-size: 14px;
    font-weight: 500;
    color: var(--muted);
    padding: 6px 10px;
    border-radius: var(--radius-sm);
    transition: color 0.15s, background 0.15s;
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

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

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

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

.hero-band__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(--radius-pill);
    margin-bottom: 20px;
}

.hero-band__h1 {
    font-size: 52px;
    font-weight: 400;
    line-height: 1.1;
    letter-spacing: -1.5px;
    color: var(--ink);
    margin-bottom: 20px;
}

.hero-band__sub {
    font-size: 16px;
    color: var(--body);
    line-height: 1.6;
    margin-bottom: 32px;
    max-width: 480px;
}

.hero-band__img {
    width: 100%;
    aspect-ratio: 4/3;
    object-fit: cover;
    border-radius: var(--radius-lg);
    border: 1px solid var(--hairline);
}

.section {
    padding: 80px 0;
}

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

.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;
    letter-spacing: -0.72px;
    color: var(--ink);
    line-height: 1.2;
    margin-bottom: 16px;
}

.section__sub {
    font-size: 16px;
    color: var(--body);
    line-height: 1.6;
    max-width: 600px;
    margin-bottom: 48px;
}

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

.article-card {
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: var(--radius-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%;
    aspect-ratio: 16/9;
    object-fit: cover;
}

.article-card__body {
    padding: 24px;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.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(--radius-pill);
    align-self: flex-start;
}

.article-card__title {
    font-size: 18px;
    font-weight: 600;
    color: var(--ink);
    line-height: 1.35;
}

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

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

.article-card__excerpt {
    font-size: 14px;
    color: var(--body);
    line-height: 1.55;
    flex: 1;
}

.article-card__meta {
    font-size: 13px;
    color: var(--muted);
    display: flex;
    align-items: center;
    gap: 8px;
    padding-top: 12px;
    border-top: 1px solid var(--hairline-soft);
}

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

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

.info-card__icon {
    font-size: 24px;
    margin-bottom: 12px;
}

.info-card__title {
    font-size: 18px;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 8px;
}

.info-card__text {
    font-size: 14px;
    color: var(--body);
    line-height: 1.6;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 500;
    border-radius: var(--radius-md);
    padding: 10px 18px;
    height: 40px;
    cursor: pointer;
    border: none;
    transition: background 0.15s, color 0.15s;
    text-decoration: none;
    white-space: nowrap;
}

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

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

.btn--secondary {
    background: var(--surface-card);
    color: var(--ink);
    border: 1px solid var(--hairline-strong);
}

.btn--secondary:hover {
    background: var(--surface-strong);
    color: var(--ink);
}

.btn--download {
    background: var(--ink);
    color: var(--canvas);
    padding: 12px 20px;
    height: 44px;
}

.btn--download:hover {
    background: #3a3930;
    color: var(--canvas);
}

.contact-section {
    padding: 80px 0;
}

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

.contact-intro__title {
    font-size: 36px;
    font-weight: 400;
    letter-spacing: -0.72px;
    color: var(--ink);
    margin-bottom: 16px;
}

.contact-intro__text {
    font-size: 16px;
    color: var(--body);
    line-height: 1.6;
    margin-bottom: 24px;
}

.contact-detail {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 24px;
}

.contact-detail__label {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    color: var(--muted);
}

.contact-detail__value {
    font-size: 16px;
    color: var(--ink);
}

.form-card {
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: var(--radius-lg);
    padding: 32px;
}

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

.form-label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--ink);
    margin-bottom: 6px;
}

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

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

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

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

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

.form-error--show {
    display: block;
}

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

.form-status--success {
    display: block;
    background: #e8f5f0;
    color: var(--success);
    border: 1px solid #b3ddd0;
}

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

.site-footer {
    background: var(--canvas);
    border-top: 1px solid var(--hairline);
    padding: 64px 24px 48px;
}

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

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

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

.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;
}

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

.footer-bottom {
    max-width: 1200px;
    margin: 0 auto;
    padding-top: 24px;
    border-top: 1px solid var(--hairline-soft);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
}

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

.cookie-banner {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    width: calc(100% - 48px);
    max-width: 720px;
    background: var(--surface-card);
    border: 1px solid var(--hairline-strong);
    border-radius: var(--radius-lg);
    padding: 20px 24px;
    z-index: 999;
    display: none;
    box-shadow: 0 2px 16px rgba(38,37,30,0.08);
}

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

.cookie-banner__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    flex-wrap: wrap;
}

.cookie-banner__text {
    font-size: 14px;
    color: var(--body);
    line-height: 1.5;
    flex: 1;
    min-width: 200px;
}

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

.cookie-banner__actions {
    display: flex;
    gap: 8px;
    flex-shrink: 0;
}

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

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

.article-hero__breadcrumb {
    font-size: 13px;
    color: var(--muted);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.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: 4px 10px;
    border-radius: var(--radius-pill);
    margin-bottom: 16px;
}

.article-hero__h1 {
    font-size: 42px;
    font-weight: 400;
    letter-spacing: -0.9px;
    color: var(--ink);
    line-height: 1.15;
    max-width: 800px;
    margin-bottom: 20px;
}

.article-hero__meta {
    font-size: 14px;
    color: var(--muted);
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}

.article-layout {
    max-width: 1200px;
    margin: 0 auto;
    padding: 48px 24px 80px;
    display: grid;
    grid-template-columns: 1fr 340px;
    gap: 64px;
    align-items: start;
}

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

.article-content img {
    width: 100%;
    border-radius: var(--radius-lg);
    border: 1px solid var(--hairline);
    margin: 32px 0;
}

.article-content h2 {
    font-size: 26px;
    font-weight: 400;
    letter-spacing: -0.325px;
    color: var(--ink);
    margin: 40px 0 16px;
    line-height: 1.25;
}

.article-content h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--ink);
    margin: 28px 0 12px;
    line-height: 1.3;
}

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

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

.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: 6px;
}

.article-content a {
    color: var(--ink);
    text-decoration: underline;
    text-underline-offset: 3px;
}

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

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

.tip-box {
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-left: 3px solid var(--primary);
    border-radius: var(--radius-md);
    padding: 20px 24px;
    margin: 32px 0;
}

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

.tip-box p {
    margin-bottom: 0;
    font-size: 15px;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    margin: 24px 0;
    font-size: 14px;
}

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

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

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

.article-sidebar {
    position: sticky;
    top: 80px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

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

.sidebar-card__title {
    font-size: 14px;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--hairline-soft);
}

.sidebar-toc {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.sidebar-toc a {
    font-size: 14px;
    color: var(--body);
    text-decoration: none;
    padding: 4px 0;
    border-bottom: 1px solid transparent;
    transition: color 0.15s;
}

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

.sidebar-related {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.related-link {
    font-size: 14px;
    color: var(--body);
    line-height: 1.4;
    padding: 8px 0;
    border-bottom: 1px solid var(--hairline-soft);
    display: block;
    transition: color 0.15s;
}

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

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

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

.page-hero__inner {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 24px;
}

.page-hero__h1 {
    font-size: 42px;
    font-weight: 400;
    letter-spacing: -0.9px;
    color: var(--ink);
    margin-bottom: 16px;
}

.page-hero__sub {
    font-size: 16px;
    color: var(--body);
    line-height: 1.6;
}

.page-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 48px 24px 80px;
}

.page-content h2 {
    font-size: 26px;
    font-weight: 400;
    letter-spacing: -0.325px;
    color: var(--ink);
    margin: 40px 0 16px;
}

.page-content h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--ink);
    margin: 28px 0 12px;
}

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

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

.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: 6px;
}

.page-updated {
    font-size: 13px;
    color: var(--muted);
    margin-top: 48px;
    padding-top: 20px;
    border-top: 1px solid var(--hairline-soft);
}

.disclaimer-box {
    background: var(--canvas-soft);
    border: 1px solid var(--hairline);
    border-radius: var(--radius-md);
    padding: 20px 24px;
    margin: 32px 0;
    font-size: 14px;
    color: var(--muted);
    line-height: 1.6;
}

@media (max-width: 1024px) {
    .hero-band__h1 { font-size: 42px; }
    .hero-band__inner { gap: 40px; }
    .articles-grid { grid-template-columns: repeat(2, 1fr); }
    .info-grid { grid-template-columns: repeat(2, 1fr); }
    .article-layout { grid-template-columns: 1fr; }
    .article-sidebar { position: static; }
    .footer-inner { grid-template-columns: 1fr 1fr; }
    .contact-grid { grid-template-columns: 1fr; gap: 40px; }
}

@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);
        padding: 12px 24px;
        flex-direction: column;
        align-items: flex-start;
    }
    .nav-menu--open { display: flex; }
    .hero-band__inner { grid-template-columns: 1fr; }
    .hero-band__img { max-width: 100%; }
    .hero-band__h1 { font-size: 32px; }
    .section__title { font-size: 28px; }
}

@media (max-width: 640px) {
    .articles-grid { grid-template-columns: 1fr; }
    .info-grid { grid-template-columns: 1fr; }
    .footer-inner { grid-template-columns: 1fr; gap: 32px; }
    .footer-bottom { flex-direction: column; align-items: flex-start; }
    .cookie-banner__inner { flex-direction: column; align-items: flex-start; }
}