/* ============================================
   MARLOW GROUP — ARTICLE PAGE STYLES
   Reading-optimized SEO article layout
   ============================================ */

.article-page {
    padding-top: calc(var(--nav-height) + 40px);
    padding-bottom: 80px;
    background: var(--color-bg);
}

/* --- Breadcrumbs --- */
.article-breadcrumbs {
    max-width: 760px;
    margin: 0 auto 24px;
    padding: 0 24px;
    font-size: 14px;
    color: var(--color-muted);
}
.article-breadcrumbs ol {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
}
.article-breadcrumbs li {
    display: flex;
    align-items: center;
    gap: 8px;
}
.article-breadcrumbs li:not(:last-child)::after {
    content: "/";
    color: var(--color-light);
}
.article-breadcrumbs a {
    color: var(--color-muted);
    transition: color 0.2s;
}
.article-breadcrumbs a:hover { color: var(--color-primary); }
.article-breadcrumbs li[aria-current] { color: var(--color-dark); }

/* --- Article header --- */
.article-header {
    max-width: 760px;
    margin: 0 auto 40px;
    padding: 0 24px;
}
.article-header__category {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-primary);
    background: var(--color-primary-light);
    padding: 6px 12px;
    border-radius: 999px;
    margin-bottom: 20px;
}
.article-header h1 {
    font-size: clamp(30px, 5vw, 44px);
    line-height: 1.15;
    margin-bottom: 20px;
    letter-spacing: -0.025em;
}
.article-header__intro {
    font-size: 19px;
    line-height: 1.6;
    color: var(--color-muted);
    margin-bottom: 28px;
}
.article-header__meta {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    font-size: 14px;
    color: var(--color-muted);
    padding-top: 24px;
    border-top: 1px solid var(--color-border);
}
.article-header__meta-item {
    display: flex;
    align-items: center;
    gap: 8px;
}
.article-header__meta strong { color: var(--color-dark); font-weight: 600; }

/* --- Key facts box --- */
.article-keyfacts {
    max-width: 760px;
    margin: 0 auto 40px;
    padding: 24px 28px;
    background: var(--color-primary-light);
    border-left: 4px solid var(--color-primary);
    border-radius: var(--radius-md);
}
.article-keyfacts h2 {
    font-size: 15px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-primary);
    margin-bottom: 14px;
}
.article-keyfacts ul {
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.article-keyfacts li {
    position: relative;
    padding-left: 26px;
    font-size: 15px;
    line-height: 1.6;
    color: var(--color-dark);
}
.article-keyfacts li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 8px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--color-primary);
    background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3.5' stroke-linecap='round' stroke-linejoin='round'><polyline points='20 6 9 17 4 12'/></svg>");
    background-repeat: no-repeat;
    background-position: center;
    background-size: 10px;
}

/* --- Table of contents --- */
.article-toc {
    max-width: 760px;
    margin: 0 auto 40px;
    padding: 24px 28px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
}
.article-toc h2 {
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-muted);
    margin-bottom: 14px;
}
.article-toc ol {
    list-style: none;
    counter-reset: toc;
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.article-toc li {
    counter-increment: toc;
    position: relative;
    padding-left: 32px;
    font-size: 15px;
    line-height: 1.5;
}
.article-toc li::before {
    content: counter(toc);
    position: absolute;
    left: 0;
    top: 0;
    width: 22px;
    height: 22px;
    background: var(--color-primary-light);
    color: var(--color-primary);
    border-radius: 50%;
    font-size: 12px;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
}
.article-toc a {
    color: var(--color-text);
    transition: color 0.2s;
    border-bottom: 1px solid transparent;
}
.article-toc a:hover {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
}

/* --- Article body --- */
.article-body {
    max-width: 760px;
    margin: 0 auto;
    padding: 0 24px;
    font-size: 17px;
    line-height: 1.75;
    color: var(--color-text);
}
.article-body h2 {
    font-size: 28px;
    margin-top: 56px;
    margin-bottom: 20px;
    letter-spacing: -0.02em;
    scroll-margin-top: calc(var(--nav-height) + 24px);
}
.article-body h2:first-child { margin-top: 0; }
.article-body h3 {
    font-size: 21px;
    margin-top: 36px;
    margin-bottom: 14px;
    color: var(--color-dark);
    letter-spacing: -0.015em;
}
.article-body p {
    margin-bottom: 20px;
}
.article-body p strong { color: var(--color-dark); font-weight: 600; }
.article-body a {
    color: var(--color-primary);
    border-bottom: 1px solid var(--color-primary);
    transition: opacity 0.2s;
}
.article-body a:hover { opacity: 0.7; }
.article-body ul, .article-body ol {
    margin: 0 0 24px 0;
    padding-left: 24px;
}
.article-body ul li, .article-body ol li {
    margin-bottom: 10px;
    line-height: 1.7;
}
.article-body ul li { list-style: disc; }
.article-body ol li { list-style: decimal; }
.article-body ul li::marker { color: var(--color-primary); }
.article-body ol li::marker { color: var(--color-primary); font-weight: 600; }

/* Callout boxes */
.article-callout {
    margin: 32px 0;
    padding: 20px 24px;
    border-radius: var(--radius-md);
    border-left: 4px solid;
    font-size: 15px;
    line-height: 1.65;
}
.article-callout h4 {
    font-size: 15px;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
}
.article-callout p { margin: 0; }
.article-callout p + p { margin-top: 10px; }
.article-callout--warning {
    background: var(--color-red-light);
    border-color: var(--color-red);
    color: #5a1717;
}
.article-callout--warning h4 { color: var(--color-red); }
.article-callout--info {
    background: var(--color-blue-light);
    border-color: var(--color-blue);
    color: #1a2d5c;
}
.article-callout--info h4 { color: var(--color-blue); }
.article-callout--tip {
    background: var(--color-green-light);
    border-color: var(--color-green);
    color: #1a3a22;
}
.article-callout--tip h4 { color: var(--color-green); }

/* Timeline for step-based articles */
.article-timeline {
    margin: 32px 0;
    padding: 0;
    counter-reset: step;
}
.article-timeline li {
    list-style: none;
    position: relative;
    padding: 20px 0 20px 60px;
    counter-increment: step;
    border-left: 2px solid var(--color-border);
    margin-left: 20px;
}
.article-timeline li::before {
    content: counter(step);
    position: absolute;
    left: -20px;
    top: 16px;
    width: 40px;
    height: 40px;
    background: var(--color-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 16px;
    font-family: var(--font-heading);
}
.article-timeline li:last-child { border-left: 2px solid transparent; }
.article-timeline li strong {
    display: block;
    color: var(--color-dark);
    font-size: 17px;
    margin-bottom: 6px;
}

/* Data table */
.article-body table {
    width: 100%;
    margin: 28px 0;
    border-collapse: collapse;
    font-size: 15px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
}
.article-body th, .article-body td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}
.article-body th {
    background: var(--color-primary-light);
    color: var(--color-primary);
    font-weight: 600;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}
.article-body tr:last-child td { border-bottom: none; }
.article-body tbody tr:hover { background: var(--color-bg); }

/* Sources / references */
.article-sources {
    margin: 48px auto 0;
    max-width: 760px;
    padding: 28px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
}
.article-sources h2 {
    font-size: 15px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-muted);
    margin-bottom: 16px;
}
.article-sources ol {
    list-style: decimal;
    padding-left: 20px;
    font-size: 14px;
    color: var(--color-muted);
    line-height: 1.6;
}
.article-sources li { margin-bottom: 8px; }
.article-sources a {
    color: var(--color-primary);
    word-break: break-word;
}
.article-sources a:hover { text-decoration: underline; }

/* --- CTA block at end of article --- */
.article-cta {
    margin: 56px auto 0;
    max-width: 760px;
    padding: 40px;
    background: linear-gradient(135deg, var(--color-primary) 0%, #0f2e22 100%);
    color: #f0f5f2;
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-lg);
}
.article-cta h2 {
    color: #ffffff;
    font-size: 28px;
    margin-bottom: 12px;
}
.article-cta p {
    font-size: 16px;
    color: #c5d5cc;
    margin-bottom: 24px;
    max-width: 520px;
    margin-left: auto;
    margin-right: auto;
}
.article-cta .btn--primary {
    background: var(--color-accent);
    color: #ffffff;
    padding: 14px 32px;
    font-size: 16px;
}
.article-cta .btn--primary:hover {
    background: #a86a30;
    transform: translateY(-1px);
}
.article-cta__note {
    margin-top: 16px;
    font-size: 13px;
    color: #8ca596;
}

/* --- Related articles --- */
.article-related {
    max-width: 1100px;
    margin: 80px auto 0;
    padding: 0 24px;
}
.article-related h2 {
    font-size: 24px;
    margin-bottom: 24px;
    text-align: center;
}
.article-related__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}
.article-related__card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 24px;
    transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease), border-color 0.3s;
}
.article-related__card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary);
}
.article-related__card span {
    display: inline-block;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-primary);
    font-weight: 600;
    margin-bottom: 10px;
}
.article-related__card h3 {
    font-size: 17px;
    line-height: 1.35;
    color: var(--color-dark);
}

/* --- Responsive --- */
@media (max-width: 720px) {
    .article-page { padding-top: calc(var(--nav-height) + 24px); padding-bottom: 56px; }
    .article-header h1 { font-size: 28px; }
    .article-header__intro { font-size: 17px; }
    .article-body { font-size: 16px; line-height: 1.7; }
    .article-body h2 { font-size: 24px; margin-top: 40px; }
    .article-body h3 { font-size: 19px; margin-top: 28px; }
    .article-cta { padding: 32px 24px; }
    .article-cta h2 { font-size: 22px; }
    .article-keyfacts, .article-toc { padding: 20px; }
    .article-timeline li { padding: 16px 0 16px 44px; }
    .article-timeline li::before { width: 36px; height: 36px; left: -18px; font-size: 14px; }
    .article-body table { font-size: 14px; }
    .article-body th, .article-body td { padding: 10px 12px; }
}