@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&display=swap');

:root {
    --canvas: #f7f7f4;
    --ink: #26251e;
    --body-color: #5a5852;
    --muted: #807d72;
    --muted-soft: #a09c92;
    --primary: #f54e00;
    --primary-active: #d04200;
    --surface-card: #ffffff;
    --surface-strong: #e6e5e0;
    --hairline: #e6e5e0;
    --hairline-soft: #efeee8;
    --hairline-strong: #cfcdc4;
    --on-primary: #ffffff;
    --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-color);
    font-family: 'Inter', system-ui, 'Helvetica Neue', Helvetica, Arial, sans-serif;
    font-size: 16px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }

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

/* ─── NAV ─── */
.site-nav {
    background: var(--canvas);
    border-bottom: 1px solid var(--hairline);
    height: 64px;
    position: sticky;
    top: 0;
    z-index: 200;
}

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

.nav-logo {
    font-size: 18px;
    font-weight: 600;
    color: var(--ink);
    letter-spacing: -0.3px;
}

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

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

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

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

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

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

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

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

.mobile-nav a {
    display: block;
    font-size: 15px;
    font-weight: 500;
    color: var(--body-color);
    padding: 10px 0;
    border-bottom: 1px solid var(--hairline-soft);
}

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

/* ─── HERO ─── */
.hero {
    padding: 80px 0;
    border-bottom: 1px solid var(--hairline);
}

.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);
    padding: 4px 10px;
    border-radius: 9999px;
    margin-bottom: 24px;
}

.hero-title {
    font-size: 56px;
    font-weight: 400;
    color: var(--ink);
    line-height: 1.1;
    letter-spacing: -1.2px;
    max-width: 760px;
    margin-bottom: 20px;
}

.hero-title em {
    font-style: normal;
    color: var(--primary);
}

.hero-desc {
    font-size: 18px;
    color: var(--body-color);
    line-height: 1.6;
    max-width: 600px;
    margin-bottom: 48px;
}

.hero-img-wrap {
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--hairline);
    max-height: 480px;
}

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

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

/* ─── SECTIONS ─── */
section { padding: 80px 0; }
section + section { border-top: 1px solid var(--hairline); }

.section-title {
    font-size: 36px;
    font-weight: 400;
    color: var(--ink);
    line-height: 1.2;
    letter-spacing: -0.72px;
    margin-bottom: 8px;
}

.section-sub {
    font-size: 16px;
    color: var(--muted);
    margin-bottom: 48px;
}

/* ─── ARTICLE CARDS ─── */
.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: 12px;
    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%;
    height: 200px;
    object-fit: cover;
}

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

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

.article-card-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--ink);
    line-height: 1.4;
    margin-bottom: 10px;
}

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

.article-card-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    font-weight: 500;
    color: var(--primary);
    margin-top: 16px;
}

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

/* ─── INFO BAND ─── */
.info-band {
    background: var(--surface-card);
    border-top: 1px solid var(--hairline);
    border-bottom: 1px solid var(--hairline);
    padding: 80px 0;
}

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

.info-img {
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--hairline);
}

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

.info-content .section-label { margin-bottom: 16px; }

.info-title {
    font-size: 32px;
    font-weight: 400;
    color: var(--ink);
    line-height: 1.25;
    letter-spacing: -0.5px;
    margin-bottom: 16px;
}

.info-text {
    font-size: 16px;
    color: var(--body-color);
    line-height: 1.65;
    margin-bottom: 12px;
}

/* ─── ARTICLE PAGE ─── */
.article-hero {
    padding: 64px 0 0;
}

.article-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 24px;
}

.article-tag {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    color: var(--on-primary);
    background: var(--primary);
    padding: 4px 10px;
    border-radius: 9999px;
}

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

.article-title {
    font-size: 44px;
    font-weight: 400;
    color: var(--ink);
    line-height: 1.15;
    letter-spacing: -0.9px;
    max-width: 820px;
    margin-bottom: 20px;
}

.article-intro {
    font-size: 18px;
    color: var(--body-color);
    line-height: 1.65;
    max-width: 720px;
    margin-bottom: 40px;
}

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

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

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

.article-content h2 {
    font-size: 26px;
    font-weight: 400;
    color: var(--ink);
    letter-spacing: -0.3px;
    margin: 40px 0 16px;
    line-height: 1.3;
}

.article-content h2:first-child { margin-top: 0; }

.article-content h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--ink);
    margin: 28px 0 12px;
    line-height: 1.35;
}

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

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

.article-content ul { list-style: disc; }
.article-content ol { list-style: decimal; }

.article-content li {
    font-size: 16px;
    color: var(--body-color);
    line-height: 1.7;
    margin-bottom: 8px;
}

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

.article-content blockquote {
    border-left: 3px solid var(--primary);
    padding: 12px 20px;
    margin: 28px 0;
    background: var(--surface-card);
    border-radius: 0 8px 8px 0;
}

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

.article-content .inline-img {
    margin: 32px 0;
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--hairline);
}

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

.article-content .inline-img figcaption {
    font-size: 13px;
    color: var(--muted);
    padding: 10px 16px;
    background: var(--surface-card);
}

.article-sidebar {
    position: sticky;
    top: 88px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

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

.sidebar-card-title {
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 16px;
}

.sidebar-toc { display: flex; flex-direction: column; gap: 10px; }

.sidebar-toc a {
    font-size: 14px;
    color: var(--body-color);
    line-height: 1.4;
    padding-left: 12px;
    border-left: 2px solid var(--hairline);
    transition: border-color 0.15s, color 0.15s;
}

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

.related-list { display: flex; flex-direction: column; gap: 14px; }

.related-item { display: flex; flex-direction: column; gap: 2px; }

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

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

.related-item span {
    font-size: 12px;
    color: var(--muted);
}

/* ─── TRAIL HIGHLIGHT BOX ─── */
.trail-box {
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: 12px;
    padding: 24px;
    margin: 28px 0;
}

.trail-box-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.trail-box-title::before {
    content: '';
    display: inline-block;
    width: 4px;
    height: 16px;
    background: var(--primary);
    border-radius: 2px;
}

.trail-box dl { display: grid; grid-template-columns: auto 1fr; gap: 8px 16px; }
.trail-box dt { font-size: 13px; font-weight: 600; color: var(--muted); }
.trail-box dd { font-size: 14px; color: var(--body-color); }

/* ─── ABOUT PAGE ─── */
.page-hero {
    padding: 64px 0;
    border-bottom: 1px solid var(--hairline);
}

.page-title {
    font-size: 44px;
    font-weight: 400;
    color: var(--ink);
    letter-spacing: -0.9px;
    margin-bottom: 16px;
}

.page-intro {
    font-size: 18px;
    color: var(--body-color);
    line-height: 1.65;
    max-width: 680px;
}

.page-content {
    padding: 64px 0 80px;
    max-width: 820px;
}

.page-content h2 {
    font-size: 26px;
    font-weight: 400;
    color: var(--ink);
    letter-spacing: -0.3px;
    margin: 40px 0 14px;
}

.page-content h2:first-child { margin-top: 0; }

.page-content p {
    font-size: 16px;
    color: var(--body-color);
    line-height: 1.7;
    margin-bottom: 18px;
}

.page-content ul, .page-content ol {
    padding-left: 20px;
    margin-bottom: 18px;
}

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

.page-content li {
    font-size: 16px;
    color: var(--body-color);
    line-height: 1.7;
    margin-bottom: 6px;
}

/* ─── CONTACT FORM ─── */
.contact-section {
    padding: 80px 0;
    border-top: 1px solid var(--hairline);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: start;
}

.contact-info-title {
    font-size: 32px;
    font-weight: 400;
    color: var(--ink);
    letter-spacing: -0.5px;
    margin-bottom: 16px;
}

.contact-info-text {
    font-size: 16px;
    color: var(--body-color);
    line-height: 1.65;
    margin-bottom: 28px;
}

.contact-detail {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 20px;
}

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

.contact-detail-value {
    font-size: 15px;
    color: var(--ink);
}

.contact-form {
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: 12px;
    padding: 32px;
}

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

.form-label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 6px;
}

.form-input, .form-textarea {
    width: 100%;
    background: var(--canvas);
    border: 1px solid var(--hairline-strong);
    border-radius: 8px;
    padding: 12px 16px;
    font-size: 15px;
    font-family: inherit;
    color: var(--ink);
    height: 44px;
    transition: border-color 0.15s;
    outline: none;
}

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

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

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

.form-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: var(--ink);
    color: var(--canvas);
    font-size: 14px;
    font-weight: 500;
    font-family: inherit;
    padding: 12px 24px;
    height: 44px;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    width: 100%;
    transition: opacity 0.15s;
}

.form-btn:hover { opacity: 0.85; }
.form-btn:disabled { opacity: 0.6; cursor: default; }

.form-status {
    margin-top: 14px;
    font-size: 14px;
    color: var(--success);
    display: none;
}

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

/* ─── FOOTER ─── */
.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-name {
    font-size: 17px;
    font-weight: 600;
    color: var(--ink);
    letter-spacing: -0.3px;
    margin-bottom: 12px;
}

.footer-brand-name span { color: var(--primary); }

.footer-brand-desc {
    font-size: 14px;
    color: var(--body-color);
    line-height: 1.6;
    max-width: 280px;
}

.footer-col-title {
    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-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-soft);
    padding-top: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
}

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

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

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

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

/* ─── COOKIE BANNER ─── */
.cookie-banner {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1000;
    background: var(--ink);
    color: var(--canvas);
    border-radius: 12px;
    padding: 20px 28px;
    display: flex;
    align-items: center;
    gap: 24px;
    max-width: 720px;
    width: calc(100% - 48px);
    border: 1px solid rgba(255,255,255,0.08);
}

.cookie-text {
    font-size: 14px;
    line-height: 1.55;
    flex: 1;
}

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

.cookie-buttons {
    display: flex;
    gap: 10px;
    flex-shrink: 0;
}

.cookie-btn {
    font-size: 13px;
    font-weight: 500;
    font-family: inherit;
    padding: 8px 16px;
    border-radius: 8px;
    cursor: pointer;
    border: none;
    white-space: nowrap;
}

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

.cookie-btn-reject {
    background: transparent;
    color: var(--canvas);
    border: 1px solid rgba(255,255,255,0.25);
}

.cookie-banner.hidden { display: none; }

/* ─── BREADCRUMBS ─── */
.breadcrumbs {
    padding: 16px 0;
    border-bottom: 1px solid var(--hairline-soft);
}

.breadcrumbs-list {
    display: flex;
    align-items: center;
    gap: 8px;
}

.breadcrumbs-list li {
    font-size: 13px;
    color: var(--muted);
    display: flex;
    align-items: center;
    gap: 8px;
}

.breadcrumbs-list li:not(:last-child)::after {
    content: '/';
    color: var(--hairline-strong);
}

.breadcrumbs-list a {
    color: var(--muted);
    transition: color 0.15s;
}

.breadcrumbs-list a:hover { color: var(--body-color); }

.breadcrumbs-list li:last-child { color: var(--body-color); }

/* ─── TRAIL FEATURES GRID ─── */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin: 48px 0 0;
}

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

.feature-item-icon {
    font-size: 22px;
    margin-bottom: 12px;
}

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

.feature-item-text {
    font-size: 14px;
    color: var(--body-color);
    line-height: 1.55;
}

/* ─── RESPONSIVE ─── */
@media (max-width: 1024px) {
    .articles-grid { grid-template-columns: 1fr 1fr; }
    .article-layout { grid-template-columns: 1fr; }
    .article-sidebar { position: static; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .info-grid { gap: 40px; }
    .contact-grid { gap: 48px; }
}

@media (max-width: 768px) {
    .hero-title { font-size: 36px; letter-spacing: -0.5px; }
    .section-title { font-size: 28px; }
    .article-title { font-size: 30px; }
    .page-title { font-size: 32px; }
    .nav-links { display: none; }
    .nav-hamburger { display: flex; }
    .articles-grid { grid-template-columns: 1fr; }
    .info-grid { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .features-grid { grid-template-columns: 1fr 1fr; }
    .cookie-banner { flex-direction: column; align-items: flex-start; }
    .hero-desc { font-size: 16px; }
    .footer-bottom { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 480px) {
    .footer-grid { grid-template-columns: 1fr; }
    .features-grid { grid-template-columns: 1fr; }
    .hero-title { font-size: 30px; }
    .article-title { font-size: 26px; }
    .cookie-buttons { flex-direction: column; width: 100%; }
    .cookie-btn { width: 100%; text-align: center; }
}