*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --canvas:          #f7f7f4;
    --canvas-soft:     #fafaf7;
    --surface-card:    #ffffff;
    --surface-strong:  #e6e5e0;
    --hairline:        #e6e5e0;
    --hairline-soft:   #efeee8;
    --hairline-strong: #cfcdc4;
    --ink:             #26251e;
    --body:            #5a5852;
    --body-strong:     #26251e;
    --muted:           #807d72;
    --muted-soft:      #a09c92;
    --primary:         #f54e00;
    --primary-active:  #d04200;
    --on-primary:      #ffffff;
    --semantic-success:#1f8a65;
    --semantic-error:  #cf2d56;

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

html { font-size: 16px; scroll-behavior: smooth; }

body {
    font-family: 'Inter', system-ui, 'Helvetica Neue', Helvetica, Arial, sans-serif;
    background: var(--canvas);
    color: var(--body);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

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

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

code { font-family: 'JetBrains Mono', 'Fira Mono', monospace; font-size: 13px; background: var(--surface-card); padding: 2px 6px; border-radius: var(--r-xs); border: 1px solid var(--hairline); }

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

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

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

.main-nav ul {
    display: flex;
    gap: 4px;
    list-style: none;
}
.main-nav a {
    font-size: 14px;
    font-weight: 500;
    color: var(--body);
    padding: 6px 12px;
    border-radius: var(--r-sm);
    transition: color 0.15s, background 0.15s;
}
.main-nav a:hover, .main-nav a.active {
    color: var(--ink);
    background: var(--surface-strong);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}
.nav-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--ink);
    border-radius: 2px;
    transition: transform 0.2s;
}

.badge-pill {
    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(--r-pill);
    line-height: 1.4;
}

.btn-primary {
    display: inline-block;
    background: var(--primary);
    color: var(--on-primary);
    font-size: 14px;
    font-weight: 500;
    padding: 10px 18px;
    height: 40px;
    border-radius: var(--r-md);
    border: none;
    cursor: pointer;
    line-height: 1;
    text-align: center;
    transition: background 0.15s;
}
.btn-primary:hover { background: var(--primary-active); color: var(--on-primary); }

.btn-download {
    display: inline-block;
    background: var(--ink);
    color: var(--canvas);
    font-size: 14px;
    font-weight: 500;
    padding: 12px 20px;
    height: 44px;
    border-radius: var(--r-md);
    line-height: 1;
    transition: opacity 0.15s;
}
.btn-download:hover { color: var(--canvas); opacity: 0.85; }

.btn-secondary {
    display: inline-block;
    background: var(--surface-card);
    color: var(--ink);
    font-size: 14px;
    font-weight: 500;
    padding: 10px 18px;
    height: 40px;
    border-radius: var(--r-md);
    border: 1px solid var(--hairline-strong);
    line-height: 1;
    transition: border-color 0.15s;
}
.btn-secondary:hover { border-color: var(--ink); color: var(--ink); }

.btn-tertiary {
    display: inline-block;
    color: var(--body);
    font-size: 14px;
    font-weight: 500;
    padding: 10px 0;
    transition: color 0.15s;
}
.btn-tertiary:hover { color: var(--ink); }

.hero-band {
    padding: 80px 0 72px;
    text-align: center;
}
.hero-band .badge-pill { margin-bottom: 20px; }
.hero-band h1 {
    font-size: 56px;
    font-weight: 400;
    line-height: 1.1;
    letter-spacing: -1.4px;
    color: var(--ink);
    margin-bottom: 20px;
}
.hero-sub {
    font-size: 18px;
    color: var(--body);
    max-width: 640px;
    margin: 0 auto 32px;
    line-height: 1.5;
}
.hero-links {
    display: flex;
    gap: 16px;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
}

.section-band { padding: 80px 0; }
.section-band--alt { background: var(--canvas-soft); }

.section-label {
    font-size: 26px;
    font-weight: 400;
    letter-spacing: -0.325px;
    color: var(--ink);
    margin-bottom: 40px;
    line-height: 1.25;
}

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

.feature-card {
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: var(--r-lg);
    padding: 24px;
}
.card-icon { font-size: 28px; margin-bottom: 14px; }
.feature-card h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 10px;
    line-height: 1.4;
}
.feature-card p { font-size: 15px; color: var(--body); line-height: 1.6; }

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

.article-card {
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: var(--r-lg);
    overflow: hidden;
}
.article-card img { width: 100%; height: 200px; object-fit: cover; transition: opacity 0.2s; }
.article-card a:hover img { opacity: 0.9; }
.article-card-body { padding: 20px; }
.article-card-body .badge-pill { margin-bottom: 12px; }
.article-card-body h3 {
    font-size: 17px;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 10px;
    line-height: 1.4;
}
.article-card-body h3 a { color: var(--ink); }
.article-card-body h3 a:hover { color: var(--primary); }
.article-card-body p { font-size: 14px; color: var(--body); margin-bottom: 14px; line-height: 1.6; }
.read-link { font-size: 14px; font-weight: 500; color: var(--primary); }
.read-link:hover { color: var(--primary-active); }

.two-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}
.two-col-text h2 {
    font-size: 32px;
    font-weight: 400;
    letter-spacing: -0.6px;
    color: var(--ink);
    margin-bottom: 20px;
    line-height: 1.2;
}
.two-col-text p { font-size: 15px; color: var(--body); margin-bottom: 16px; line-height: 1.7; }
.two-col-text .btn-secondary { margin-top: 8px; }
.two-col-image img { border-radius: var(--r-lg); width: 100%; object-fit: cover; }

.ref-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}
.ref-item {
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: var(--r-lg);
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.ref-label { font-size: 12px; font-weight: 600; letter-spacing: 0.6px; text-transform: uppercase; color: var(--muted); }
.ref-value { font-size: 22px; font-weight: 400; color: var(--ink); letter-spacing: -0.2px; }

.contact-band { background: var(--canvas); }
.contact-band h2 {
    font-size: 36px;
    font-weight: 400;
    color: var(--ink);
    letter-spacing: -0.72px;
    margin-bottom: 12px;
}
.contact-band > .container > p { color: var(--body); margin-bottom: 32px; font-size: 16px; }

.contact-form {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    max-width: 720px;
}
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group--full { grid-column: 1 / -1; }
.form-group label { font-size: 14px; font-weight: 500; color: var(--ink); }
.form-group input, .form-group textarea {
    background: var(--surface-card);
    color: var(--ink);
    border: 1px solid var(--hairline-strong);
    border-radius: var(--r-md);
    padding: 12px 16px;
    font-size: 15px;
    font-family: inherit;
    line-height: 1.5;
    transition: border-color 0.15s;
    width: 100%;
}
.form-group input:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--ink);
}
.form-group textarea { resize: vertical; min-height: 120px; }

.form-status { margin-top: 12px; font-size: 14px; }
.form-status.success { color: var(--semantic-success); }
.form-status.error { color: var(--semantic-error); }

.site-footer {
    background: var(--canvas);
    border-top: 1px solid var(--hairline);
    padding: 64px 0 48px;
}
.footer-inner {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
}
.footer-wordmark { display: block; font-size: 16px; font-weight: 600; color: var(--ink); margin-bottom: 12px; }
.footer-col p { font-size: 14px; color: var(--body); line-height: 1.6; }
.footer-col h4 { font-size: 14px; font-weight: 600; color: var(--ink); margin-bottom: 14px; }
.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.footer-col ul li a { font-size: 14px; color: var(--body); }
.footer-col ul li a:hover { color: var(--ink); }
.footer-col ul li { font-size: 14px; color: var(--body); }

.footer-bottom {
    border-top: 1px solid var(--hairline);
    margin-top: 48px;
    padding-top: 24px;
}
.footer-bottom .container { display: flex; justify-content: space-between; }
.footer-bottom span { font-size: 13px; color: var(--muted); }

.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--ink);
    color: var(--canvas);
    z-index: 999;
    padding: 0;
}
.cookie-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 16px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    flex-wrap: wrap;
}
.cookie-inner p { font-size: 14px; color: var(--canvas-soft); line-height: 1.5; flex: 1; min-width: 200px; }
.cookie-actions { display: flex; gap: 10px; flex-shrink: 0; }
#cookie-accept {
    background: var(--primary);
    color: var(--on-primary);
    border: none;
    border-radius: var(--r-md);
    padding: 8px 16px;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
}
#cookie-accept:hover { background: var(--primary-active); }
#cookie-reject {
    background: transparent;
    color: var(--canvas);
    border: 1px solid rgba(255,255,255,0.3);
    border-radius: var(--r-md);
    padding: 8px 16px;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
}
#cookie-reject:hover { border-color: rgba(255,255,255,0.6); }

.page-main { padding: 60px 0 80px; }
.page-container { max-width: 760px; }
.article-container { max-width: 760px; }

.page-header { margin-bottom: 40px; }
.page-header .badge-pill { margin-bottom: 16px; }
.page-header h1 {
    font-size: 40px;
    font-weight: 400;
    color: var(--ink);
    letter-spacing: -0.8px;
    line-height: 1.15;
    margin-bottom: 14px;
}
.page-intro { font-size: 18px; color: var(--body); line-height: 1.6; }

.page-body h2, .article-body h2 {
    font-size: 24px;
    font-weight: 600;
    color: var(--ink);
    margin: 36px 0 14px;
    line-height: 1.3;
}
.page-body h3, .article-body h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--ink);
    margin: 24px 0 10px;
    line-height: 1.4;
}
.page-body p, .article-body p {
    font-size: 16px;
    color: var(--body);
    line-height: 1.75;
    margin-bottom: 16px;
}
.page-body ul, .article-body ul {
    padding-left: 20px;
    margin-bottom: 16px;
}
.page-body ul li, .article-body ul li {
    font-size: 16px;
    color: var(--body);
    line-height: 1.75;
    margin-bottom: 6px;
}
.page-body a, .article-body a { color: var(--primary); text-decoration: underline; text-underline-offset: 3px; }
.page-body a:hover, .article-body a:hover { color: var(--primary-active); }

.article-header { margin-bottom: 32px; }
.article-header .badge-pill { margin-bottom: 14px; }
.article-header h1 {
    font-size: 38px;
    font-weight: 400;
    color: var(--ink);
    letter-spacing: -0.76px;
    line-height: 1.15;
    margin-bottom: 12px;
}
.article-meta { display: flex; gap: 8px; font-size: 13px; color: var(--muted); }

.article-figure {
    margin: 0 0 40px;
    border-radius: var(--r-lg);
    overflow: hidden;
    border: 1px solid var(--hairline);
}
.article-figure img { width: 100%; height: 400px; object-fit: cover; }
.article-figure figcaption { padding: 10px 16px; font-size: 13px; color: var(--muted); background: var(--canvas-soft); border-top: 1px solid var(--hairline); }

.ref-list { padding-left: 20px; margin-top: 8px; }
.ref-list li { margin-bottom: 8px; }
.ref-list a { font-size: 15px; }

.article-nav {
    display: flex;
    gap: 12px;
    margin-top: 48px;
    padding-top: 32px;
    border-top: 1px solid var(--hairline);
    flex-wrap: wrap;
}

@media (max-width: 1024px) {
    .feature-grid, .articles-grid { grid-template-columns: 1fr 1fr; }
    .hero-band h1 { font-size: 44px; }
    .footer-inner { grid-template-columns: 1fr 1fr; }
    .ref-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .nav-toggle { display: flex; }
    .main-nav {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: var(--canvas);
        border-bottom: 1px solid var(--hairline);
        padding: 12px 16px;
    }
    .main-nav.open { display: block; }
    .main-nav ul { flex-direction: column; gap: 0; }
    .main-nav a { display: block; padding: 10px 12px; }
    .two-col { grid-template-columns: 1fr; gap: 32px; }
    .two-col-image { order: -1; }
    .contact-form { grid-template-columns: 1fr; }
    .hero-band h1 { font-size: 34px; letter-spacing: -0.8px; }
    .hero-sub { font-size: 16px; }
}

@media (max-width: 640px) {
    .feature-grid, .articles-grid { grid-template-columns: 1fr; }
    .footer-inner { grid-template-columns: 1fr; gap: 28px; }
    .footer-bottom .container { flex-direction: column; gap: 4px; }
    .ref-grid { grid-template-columns: 1fr 1fr; }
    .hero-band { padding: 48px 0 40px; }
    .section-band { padding: 48px 0; }
    .article-figure img { height: 240px; }
    .page-header h1, .article-header h1 { font-size: 28px; }
}