/* ============================================================
   KidsWorkPrint — Shared Design System (content pages)
   Brand tokens mirror the existing tool pages:
   nav #1e3a5f · accent #3182ce · gold #facc15 · bg #f8fafc
   ============================================================ */
:root {
    --nav-bg: #1e3a5f;
    --nav-bg-2: #16314f;
    --brand: #2c5282;
    --accent: #3182ce;
    --accent-hover: #2b6cb0;
    --gold: #facc15;
    --bg: #f8fafc;
    --surface: #ffffff;
    --text: #1e293b;
    --muted: #64748b;
    --border: #e2e8f0;
    --soft-blue: #eff6ff;
    --soft-blue-border: #dbeafe;
    --radius: 12px;
    --maxw: 1100px;
}

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

body {
    font-family: Arial, Helvetica, sans-serif;
    background-color: var(--bg);
    color: var(--text);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); }

.container {
    max-width: var(--maxw);
    margin: 0 auto;
    padding: 0 20px;
}

/* ===== TOP NAVIGATION ===== */
.main-nav {
    background: var(--nav-bg);
    color: #fff;
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
    position: sticky;
    top: 0;
    z-index: 999;
}
.nav-container {
    max-width: var(--maxw);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    min-height: 56px;
    padding: 0 20px;
}
.nav-brand {
    font-size: 1.3rem;
    font-weight: 700;
    color: #fff;
    text-decoration: none;
    letter-spacing: 0.5px;
    padding: 8px 0;
}
.nav-brand:hover { color: var(--gold); }
.nav-links {
    display: flex;
    flex-wrap: wrap;
    gap: 6px 14px;
    list-style: none;
    padding: 6px 0;
    align-items: center;
}
.nav-links li a {
    color: #e2e8f0;
    text-decoration: none;
    font-size: 0.92rem;
    font-weight: 500;
    padding: 4px 0;
    border-bottom: 2px solid transparent;
    transition: 0.2s;
    white-space: nowrap;
}
.nav-links li a:hover,
.nav-links li a.active { color: #fff; border-bottom-color: var(--gold); }

.nav-toggle {
    display: none;
    background: none;
    border: 1px solid rgba(255,255,255,0.4);
    color: #fff;
    border-radius: 6px;
    padding: 6px 10px;
    font-size: 1rem;
    cursor: pointer;
}

/* ===== BREADCRUMB ===== */
.breadcrumb {
    font-size: 0.85rem;
    color: var(--muted);
    padding: 18px 0 0;
}
.breadcrumb a { color: var(--accent); text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb span.sep { margin: 0 6px; color: #cbd5e1; }

/* ===== HERO ===== */
.page-hero {
    text-align: center;
    padding: 28px 0 14px;
}
.page-hero h1 {
    color: var(--brand);
    font-size: 2.4rem;
    line-height: 1.2;
    margin-bottom: 12px;
}
.page-hero .subtitle {
    font-size: 1.12rem;
    color: var(--muted);
    max-width: 760px;
    margin: 0 auto;
}

/* ===== CONTENT CARD ===== */
.content-card {
    background: var(--surface);
    border-radius: var(--radius);
    padding: 34px 36px;
    margin: 22px 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.06);
    border: 1px solid var(--border);
}
.content-card h2 {
    color: var(--brand);
    font-size: 1.65rem;
    margin: 26px 0 12px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--soft-blue-border);
}
.content-card h2:first-child { margin-top: 0; }
.content-card h3 {
    color: #243b53;
    font-size: 1.22rem;
    margin: 22px 0 8px;
}
.content-card p { margin-bottom: 14px; }
.content-card ul, .content-card ol { margin: 0 0 16px 22px; }
.content-card li { margin-bottom: 8px; }
.content-card strong { color: var(--nav-bg); }
.content-card a.inline { color: var(--accent); text-decoration: underline; }

/* callout box */
.tip-box {
    background: var(--soft-blue);
    border-left: 4px solid var(--accent);
    border-radius: 8px;
    padding: 16px 18px;
    margin: 18px 0;
    color: #1e3357;
}
.tip-box strong { color: var(--nav-bg); }

/* ===== RELATED / TOPIC GRID ===== */
.section-title {
    color: var(--brand);
    font-size: 1.6rem;
    margin: 36px 0 16px;
    text-align: center;
}
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 22px;
    margin: 10px 0 30px;
}
.info-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 22px 22px;
    box-shadow: 0 1px 6px rgba(0,0,0,0.05);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.info-card:hover { transform: translateY(-4px); box-shadow: 0 6px 18px rgba(30,58,95,0.12); }
.info-card .ico { font-size: 2rem; margin-bottom: 8px; }
.info-card h3 { font-size: 1.15rem; color: var(--brand); margin-bottom: 8px; }
.info-card p { font-size: 0.95rem; color: var(--muted); margin-bottom: 14px; }
.info-card a.btn-link {
    display: inline-block;
    background: var(--accent);
    color: #fff;
    text-decoration: none;
    padding: 9px 20px;
    border-radius: 8px;
    font-size: 0.92rem;
    font-weight: 600;
    transition: background 0.2s;
}
.info-card a.btn-link:hover { background: var(--accent-hover); }

/* ===== CTA BANNER ===== */
.cta-banner {
    background: linear-gradient(135deg, #1e3a5f, #2c5282);
    color: #fff;
    border-radius: var(--radius);
    padding: 30px 34px;
    text-align: center;
    margin: 28px 0;
}
.cta-banner h2 { color: #fff; font-size: 1.7rem; margin-bottom: 10px; }
.cta-banner p { color: #dbeafe; margin-bottom: 18px; }
.cta-banner a.btn-cta {
    display: inline-block;
    background: var(--gold);
    color: #1e3a5f;
    font-weight: 700;
    text-decoration: none;
    padding: 12px 28px;
    border-radius: 8px;
    transition: 0.2s;
}
.cta-banner a.btn-cta:hover { background: #fde047; }

/* ===== FAQ ===== */
.faq-section {
    background: var(--surface);
    border-radius: var(--radius);
    padding: 28px 30px;
    margin: 26px 0;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
    border: 1px solid var(--border);
}
.faq-section h2 { color: var(--brand); font-size: 1.6rem; margin-bottom: 18px; }
.faq-item { border-bottom: 1px solid var(--border); padding: 14px 0; }
.faq-item:last-child { border-bottom: none; }
.faq-question {
    width: 100%;
    background: none;
    border: none;
    text-align: left;
    font-size: 1rem;
    font-weight: 700;
    color: var(--nav-bg);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    padding: 0;
}
.faq-question .faq-arrow { font-size: 0.85rem; color: var(--accent); transition: transform 0.2s; flex-shrink: 0; }
.faq-question[aria-expanded="true"] .faq-arrow { transform: rotate(180deg); }
.faq-answer { display: none; padding-top: 10px; color: #4a5568; font-size: 0.97rem; }
.faq-answer.open { display: block; }

/* ===== TABLE OF CONTENTS ===== */
.toc {
    background: var(--soft-blue);
    border: 1px solid var(--soft-blue-border);
    border-radius: 10px;
    padding: 16px 20px;
    margin: 0 0 20px;
}
.toc h4 { color: var(--nav-bg); font-size: 0.95rem; margin-bottom: 8px; }
.toc ol { margin: 0 0 0 20px; }
.toc li { margin-bottom: 4px; }
.toc a { color: var(--accent); text-decoration: none; font-size: 0.92rem; }
.toc a:hover { text-decoration: underline; }

/* ===== AUTHOR / ARTICLE META ===== */
.article-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    align-items: center;
    color: var(--muted);
    font-size: 0.9rem;
    margin: 6px 0 18px;
}
.article-meta .author-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--soft-blue);
    padding: 6px 12px;
    border-radius: 999px;
    color: var(--nav-bg);
    font-weight: 600;
}
.featured-img {
    width: 100%;
    border-radius: var(--radius);
    margin: 6px 0 18px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.08);
}

/* ===== FOOTER ===== */
.site-footer {
    text-align: center;
    padding: 30px 20px 40px;
    border-top: 1px solid var(--border);
    color: var(--muted);
    font-size: 0.9rem;
    margin-top: 28px;
}
.site-footer a { color: var(--accent); text-decoration: none; margin: 0 8px; }
.site-footer a:hover { text-decoration: underline; }
.site-footer .copy { margin-top: 10px; }

/* ===== RESPONSIVE ===== */
@media (max-width: 820px) {
    .nav-toggle { display: block; }
    .nav-links {
        display: none;
        width: 100%;
        flex-direction: column;
        align-items: stretch;
        gap: 2px;
        padding: 8px 0 12px;
    }
    .nav-links.open { display: flex; }
    .nav-links li a { padding: 8px 4px; border-bottom: 1px solid rgba(255,255,255,0.08); }
    .page-hero h1 { font-size: 1.8rem; }
    .content-card { padding: 22px 18px; }
    .content-card h2 { font-size: 1.35rem; }
}
@media (max-width: 480px) {
    .card-grid { grid-template-columns: 1fr; }
    .container { padding: 0 12px; }
}