/* ───────────────────────────────────────────────────────────
 Quill Blog - shared styles. Matches the landing site theme.
 Dark default + light override, Inter, purple accent.
 ─────────────────────────────────────────────────────────── */

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

:root {
 --accent: #7c3aed;
 --accent2: #a855f7;
 --accent3: #6d28d9;
 --gold: #b45309;
 --green: #059669;
 --red: #dc2626;
 --bg: #f3f4f6;
 --bg2: #ffffff;
 --bg3: #e9eaee;
 --border: rgba(0,0,0,0.08);
 --border2: rgba(0,0,0,0.14);
 --text: #18181b;
 --text2: #3f3f46;
 --text3: #6b7280;
 --nav-bg: rgba(243,244,246,0.85);
 --shadow: rgba(0,0,0,0.08);
 --radius: 16px;
 --radius-sm: 10px;
}

[data-theme="dark"] {
 --accent3: #c084fc;
 --gold: #f59e0b;
 --green: #10b981;
 --red: #ef4444;
 --bg: #09090b;
 --bg2: #111115;
 --bg3: #18181f;
 --border: rgba(255,255,255,0.07);
 --border2: rgba(255,255,255,0.13);
 --text: #f4f4f5;
 --text2: #a1a1aa;
 --text3: #71717a;
 --nav-bg: rgba(9,9,11,0.85);
 --shadow: rgba(0,0,0,0.5);
}

html { scroll-behavior: smooth; }
body {
 font-family: 'Inter', system-ui, -apple-system, sans-serif;
 background: var(--bg);
 color: var(--text);
 line-height: 1.7;
 -webkit-font-smoothing: antialiased;
}

a { color: var(--accent3); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---- NAV ---- */
nav#main-nav {
 position: sticky; top: 0; z-index: 50;
 display: flex; align-items: center; justify-content: space-between;
 padding: 0 40px; height: 64px;
 background: var(--nav-bg);
 backdrop-filter: blur(20px);
 border-bottom: 1px solid var(--border);
}
.nav-logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.15rem; letter-spacing: -.02em; color: var(--text); }
.nav-logo:hover { text-decoration: none; }
.logo-icon { width: 32px; height: 32px; border-radius: 8px; object-fit: cover; display: block; box-shadow: 0 0 20px rgba(124,58,237,.4); }
.nav-links { display: flex; gap: 22px; list-style: none; }
.nav-links a { color: var(--text2); font-size: .9rem; font-weight: 500; }
.nav-links a:hover { color: var(--text); text-decoration: none; }
.nav-cta {
 background: var(--accent); color: #fff; padding: 9px 18px;
 border-radius: var(--radius-sm); font-weight: 600; font-size: .9rem;
}
.nav-cta:hover { background: var(--accent2); text-decoration: none; }
.theme-toggle { background: none; border: 1px solid var(--border2); color: var(--text); border-radius: 8px; padding: 6px 10px; cursor: pointer; font-size: 1rem; }
@media (max-width: 720px) { .nav-links { display: none; } }

/* ---- LAYOUT ---- */
.wrap { max-width: 760px; margin: 0 auto; padding: 0 24px; }
.wrap-wide { max-width: 1100px; margin: 0 auto; padding: 0 24px; }

/* ---- BLOG INDEX ---- */
.blog-hero { text-align: center; padding: 72px 24px 40px; }
.blog-hero h1 { font-size: 2.6rem; font-weight: 900; letter-spacing: -0.02em; margin-bottom: 14px; }
.blog-hero p { color: var(--text2); font-size: 1.1rem; max-width: 520px; margin: 0 auto; }
.eyebrow { color: var(--accent3); font-weight: 700; font-size: .8rem; letter-spacing: .08em; text-transform: uppercase; margin-bottom: 14px; }

/* ---- CATEGORY FILTER ---- */
.blog-filter { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; max-width: 1100px; margin: 0 auto; padding: 8px 24px 4px; }
.blog-filter .chip { font-family: inherit; cursor: pointer; border: 1px solid var(--border2); background: var(--bg2); color: var(--text2); font-size: .85rem; font-weight: 600; padding: 8px 16px; border-radius: 999px; transition: background .15s, border-color .15s, color .15s; }
.blog-filter .chip:hover { border-color: var(--accent); color: var(--text); }
.blog-filter .chip.active { background: var(--accent); border-color: var(--accent); color: #fff; }
.blog-filter .chip-count { opacity: .55; font-weight: 500; margin-left: 2px; }
.blog-filter .chip.active .chip-count { opacity: .8; }

/* ---- PAGINATION ---- */
.pagination { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; padding: 8px 24px 80px; }
.pagination .pg { font-family: inherit; cursor: pointer; min-width: 42px; border: 1px solid var(--border2); background: var(--bg2); color: var(--text2); font-size: .9rem; font-weight: 600; padding: 9px 14px; border-radius: 10px; transition: background .15s, border-color .15s, color .15s; }
.pagination .pg:hover:not(:disabled) { border-color: var(--accent); color: var(--text); }
.pagination .pg.active { background: var(--accent); border-color: var(--accent); color: #fff; }
.pagination .pg:disabled { opacity: .4; cursor: default; }

.post-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 20px; padding: 20px 0 40px; }
.post-card {
 background: var(--bg2); border: 1px solid var(--border);
 border-radius: var(--radius); padding: 0; overflow: hidden;
 box-shadow: 0 1px 3px var(--shadow);
 transition: transform .2s, border-color .2s, box-shadow .2s;
 display: flex; flex-direction: column;
}
.post-card:hover { transform: translateY(-3px); border-color: var(--border2); box-shadow: 0 12px 30px var(--shadow); text-decoration: none; }
.post-thumb { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; display: block; border-bottom: 1px solid var(--border); background: var(--bg3); }
.post-card-body { padding: 22px 24px 24px; display: flex; flex-direction: column; flex: 1; }
.post-card .tag { color: var(--accent3); font-size: .75rem; font-weight: 700; text-transform: uppercase; letter-spacing: .06em; }
.post-card h2 { font-size: 1.2rem; font-weight: 700; margin: 9px 0; color: var(--text); line-height: 1.35; }
.post-card p { color: var(--text2); font-size: .92rem; flex: 1; }
.post-card .meta { color: var(--text3); font-size: .8rem; margin-top: 16px; }

/* ---- ARTICLE ---- */
article.post { padding: 56px 0 40px; }
.post-breadcrumb { font-size: .82rem; color: var(--text3); margin-bottom: 22px; }
.post-breadcrumb a { color: var(--text2); }
article.post h1 { font-size: 2.4rem; font-weight: 900; letter-spacing: -0.02em; line-height: 1.15; margin-bottom: 16px; }
.post-meta { color: var(--text3); font-size: .88rem; margin-bottom: 8px; }
.post-lede { font-size: 1.18rem; color: var(--text2); margin: 22px 0 28px; line-height: 1.6; }
.post-hero { width: 100%; aspect-ratio: 2 / 1; object-fit: cover; border-radius: var(--radius); border: 1px solid var(--border); margin: 0 0 36px; display: block; box-shadow: 0 4px 16px var(--shadow); }
article.post h2 { font-size: 1.6rem; font-weight: 800; margin: 44px 0 14px; letter-spacing: -0.01em; }
article.post h3 { font-size: 1.2rem; font-weight: 700; margin: 30px 0 10px; }
article.post p { margin-bottom: 18px; color: var(--text); }
article.post ul, article.post ol { margin: 0 0 18px 24px; color: var(--text); }
article.post li { margin-bottom: 8px; }
article.post strong { color: var(--text); font-weight: 700; }
article.post blockquote {
 border-left: 3px solid var(--accent); padding: 6px 20px; margin: 24px 0;
 color: var(--text2); font-style: italic; background: var(--bg2); border-radius: 0 8px 8px 0;
}
article.post code { background: var(--bg3); padding: 2px 7px; border-radius: 6px; font-size: .88em; font-family: ui-monospace, "SF Mono", Menlo, monospace; }
article.post table { width: 100%; border-collapse: collapse; margin: 24px 0; font-size: .92rem; }
article.post th, article.post td { border: 1px solid var(--border2); padding: 10px 14px; text-align: left; }
article.post th { background: var(--bg2); font-weight: 700; }
.callout {
 background: var(--bg2); border: 1px solid var(--border2); border-radius: var(--radius);
 padding: 22px 26px; margin: 32px 0;
}
.callout strong { color: var(--accent3); }

/* ---- FAQ ---- */
.faq { margin: 40px 0; }
.faq h2 { margin-bottom: 18px; }
.faq details { border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 16px 20px; margin-bottom: 12px; background: var(--bg2); }
.faq summary { font-weight: 700; cursor: pointer; color: var(--text); }
.faq details p { margin: 12px 0 0; color: var(--text2); }

/* ---- CTA BLOCK ---- */
.cta-block {
 background: linear-gradient(135deg, var(--accent), var(--accent2));
 border-radius: var(--radius); padding: 40px 32px; text-align: center;
 margin: 48px 0 12px; color: #fff;
}
.cta-block h3 { font-size: 1.5rem; font-weight: 800; margin-bottom: 10px; color: #fff; }
article.post .cta-block p { color: rgba(255,255,255,0.92); margin-bottom: 20px; }
.cta-block a.btn { background: #fff; color: var(--accent); padding: 12px 26px; border-radius: var(--radius-sm); font-weight: 700; display: inline-block; }
.cta-block a.btn:hover { text-decoration: none; opacity: .92; }

/* ---- FOOTER ---- */
footer { border-top: 1px solid var(--border); padding: 40px 24px; text-align: center; margin-top: 40px; }
.footer-inner { max-width: 1100px; margin: 0 auto; display: flex; flex-direction: column; align-items: center; gap: 16px; }
.footer-links { display: flex; gap: 24px; flex-wrap: wrap; justify-content: center; }
.footer-links a { color: var(--text3); font-size: .85rem; }
.footer-links a:hover { color: var(--text2); }
.footer-copy { color: var(--text3); font-size: .8rem; }

/* ---- NEWSLETTER ---- */
.nl-section { padding: 60px 0; border-top: 1px solid var(--border); }
.nl-inner { max-width: 540px; margin: 0 auto; text-align: center; padding: 0 24px; }
.nl-inner h2 { font-size: 1.5rem; font-weight: 800; letter-spacing: -.03em; margin-bottom: 10px; }
.nl-inner p { color: var(--text2); font-size: 1rem; margin-bottom: 24px; line-height: 1.6; }
.nl-form { display: flex; gap: 10px; }
.nl-form input[type="email"] {
  flex: 1; padding: 13px 16px; border: 1.5px solid var(--border);
  border-radius: 10px; font-size: 15px; background: var(--surface);
  color: var(--text); outline: none; transition: border-color .15s;
}
.nl-form input[type="email"]:focus { border-color: var(--accent); }
.nl-form button {
  padding: 13px 22px; background: var(--accent); color: #fff;
  border: 0; border-radius: 10px; font-size: 15px; font-weight: 600;
  cursor: pointer; white-space: nowrap; transition: opacity .15s;
}
.nl-form button:hover { opacity: .88; }
.nl-form button:disabled { opacity: .5; cursor: default; }
.nl-msg { margin-top: 14px; font-size: 14px; min-height: 20px; }
.nl-msg.ok { color: #059669; }
.nl-msg.err { color: #dc2626; }
.nl-note { margin-top: 12px; font-size: 12px; color: var(--text3, #9ca3af); }
@media (max-width: 480px) { .nl-form { flex-direction: column; } }