/* ============================================================
   WhaleHub Blog — article + index styling.
   Built on the design-system tokens (../styles.css). Deep navy
   surfaces, teal #00cc99 → blue #005f99 accent, Poppins/Inter.
   ============================================================ */

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--bg-app);color:var(--text-body);
  font-family:var(--font-body, 'Inter', sans-serif);font-size:16px;line-height:1.55;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
::selection{background:var(--teal-500);color:#06241c}
a{text-decoration:none;color:inherit}
img{display:block;max-width:100%;height:auto}
h1,h2,h3,h4{font-family:var(--font-heading, 'Poppins', sans-serif);color:var(--text-heading);letter-spacing:-.02em;line-height:1.2}
.wrap{max-width:1200px;margin:0 auto;padding:0 28px}

/* ---- nav (mirrors the marketing site) ---- */
.nav{display:flex;align-items:center;gap:28px;height:72px;max-width:1200px;margin:0 auto;padding:0 28px}
.nav .logo{height:30px;width:auto}
.nav-links{display:flex;gap:26px;margin-left:8px}
.nav-links a{color:var(--text-muted);font-family:var(--font-heading, 'Poppins', sans-serif);font-weight:500;font-size:14px;transition:color .2s}
.nav-links a:hover,.nav-links a.active{color:var(--text-heading)}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:14px}
.topbar{position:sticky;top:0;z-index:50;background:rgba(11,13,21,.82);backdrop-filter:blur(12px);border-bottom:1px solid var(--border-subtle)}

/* ---- buttons ---- */
.btn{display:inline-flex;align-items:center;gap:9px;font-family:var(--font-heading, 'Poppins', sans-serif);font-weight:600;
  font-size:15px;border-radius:12px;padding:13px 22px;cursor:pointer;border:1px solid transparent;transition:transform .2s,box-shadow .2s,filter .2s;white-space:nowrap}
.btn:active{transform:scale(.97)}
.btn-primary{background:linear-gradient(120deg,#00e0a3 0%,#0aa0c4 52%,#0b6aa6 100%);color:#fff;font-weight:600;box-shadow:0 2px 14px -2px rgba(0,204,153,.35)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 30px 3px rgba(0,204,153,.5)}
.btn-ghost{background:transparent;color:var(--text-body);border:1px solid var(--border-default)}
.btn-ghost:hover{border-color:var(--border-accent);color:var(--text-heading)}
.ic-whale{display:block;flex-shrink:0;border-radius:5px}

/* ---- badges / tags ---- */
.tag{display:inline-flex;align-items:center;font-family:var(--font-heading, 'Poppins', sans-serif);font-weight:600;font-size:12px;
  letter-spacing:.14em;text-transform:uppercase;border-radius:999px;padding:5px 13px;
  background:rgba(0,204,153,.10);color:var(--teal-300);border:1px solid rgba(0,204,153,.24)}
.tag.blue{background:rgba(38,165,228,.10);color:var(--blue-sky);border-color:rgba(38,165,228,.26)}

/* ============================================================
   BLOG INDEX
   ============================================================ */
.blog-hero{padding:70px 0 40px;text-align:center;background:radial-gradient(120% 120% at 50% 0%,#14182a 0%,var(--navy-900) 55%,var(--navy-950) 100%)}
.blog-hero .overline{font-family:var(--font-heading,'Poppins',sans-serif);font-weight:600;font-size:13px;letter-spacing:.18em;text-transform:uppercase;color:var(--text-accent)}
.blog-hero h1{font-size:clamp(34px,5vw,52px);font-weight:800;margin:14px 0 12px}
.blog-hero p{color:var(--text-muted);max-width:620px;margin:0 auto;font-size:18px}

.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(340px,1fr));gap:26px;padding:44px 0 80px}
.card{background:var(--surface-card);border:1px solid var(--border-subtle);border-radius:16px;overflow:hidden;
  display:flex;flex-direction:column;transition:transform .2s,border-color .2s,box-shadow .2s}
.card:hover{transform:translateY(-4px);border-color:var(--border-accent);box-shadow:0 14px 40px -12px rgba(0,0,0,.6)}
.card img{aspect-ratio:1200/630;object-fit:cover;width:100%;border-bottom:1px solid var(--border-subtle)}
.card-body{padding:20px 22px 24px;display:flex;flex-direction:column;gap:11px;flex:1}
.card h2{font-size:20px;font-weight:700;line-height:1.28}
.card p{color:var(--text-muted);font-size:14.5px;line-height:1.5;flex:1}
.card .meta{font-size:12.5px;color:var(--text-subtle);font-family:var(--font-body,'Inter',sans-serif)}
.card .readmore{color:var(--teal-400);font-weight:600;font-size:14px;font-family:var(--font-heading,'Poppins',sans-serif)}

/* ============================================================
   ARTICLE
   ============================================================ */
.article{padding:0 0 40px}
.article-head{padding:56px 0 8px;background:radial-gradient(120% 120% at 50% 0%,#14182a 0%,var(--navy-900) 60%,var(--navy-900) 100%)}
.breadcrumb{font-size:13px;color:var(--text-subtle);margin-bottom:20px}
.breadcrumb a:hover{color:var(--teal-400)}
.article-head h1{font-size:clamp(30px,4.4vw,46px);font-weight:800;max-width:900px;margin:16px 0 18px;line-height:1.14}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:14px;color:var(--text-muted);font-size:14px}
.article-meta .author{display:flex;align-items:center;gap:9px;font-weight:600;color:var(--text-body)}
.article-meta .author img{width:30px;height:30px;border-radius:50%;border:1px solid var(--border-default)}
.article-meta .dot-sep{width:3px;height:3px;border-radius:50%;background:var(--text-subtle)}
.cover-fig{margin:34px 0 0}
.cover-fig img{width:100%;border-radius:16px;border:1px solid var(--border-subtle)}

/* content column */
.content{max-width:760px;margin:0 auto;padding:0 28px}
.content-wide{max-width:1120px;margin:0 auto;padding:0 28px;display:grid;grid-template-columns:1fr;gap:0}

.lead{font-size:20px;line-height:1.6;color:var(--ink-100);margin:38px 0 8px}
.prose{font-size:17px;line-height:1.72;color:var(--text-body)}
.prose h2{font-size:28px;font-weight:700;margin:44px 0 8px;scroll-margin-top:90px}
.prose h3{font-size:21px;font-weight:600;margin:30px 0 6px;color:var(--ink-100);scroll-margin-top:90px}
.prose p{margin:14px 0}
.prose ul,.prose ol{margin:14px 0 14px 4px;padding-left:22px}
.prose li{margin:8px 0}
.prose li::marker{color:var(--teal-500)}
.prose a{color:var(--teal-400);border-bottom:1px solid rgba(0,204,153,.3);transition:border-color .2s}
.prose a:hover{border-bottom-color:var(--teal-400)}
.prose strong{color:var(--ink-100);font-weight:600}
.prose hr{border:none;border-top:1px solid var(--border-subtle);margin:40px 0}

/* answer block — first para under an H2 question (GEO extraction) */
.answer{background:linear-gradient(180deg,rgba(0,204,153,.06),rgba(0,204,153,.02));border-left:3px solid var(--teal-500);
  border-radius:0 10px 10px 0;padding:16px 20px;margin:16px 0;font-size:17px;color:var(--ink-100)}

/* callout / TL;DR */
.callout{background:var(--surface-raised);border:1px solid var(--border-subtle);border-radius:14px;padding:22px 24px;margin:26px 0}
.callout .k{font-family:var(--font-heading,'Poppins',sans-serif);font-weight:700;color:var(--teal-300);font-size:13px;letter-spacing:.1em;text-transform:uppercase;margin-bottom:8px}
.callout p{margin:6px 0}

/* tables */
.tbl-wrap{overflow-x:auto;margin:24px 0;border:1px solid var(--border-subtle);border-radius:12px}
table{border-collapse:collapse;width:100%;font-size:15px;min-width:460px}
thead{background:var(--navy-650)}
th{text-align:left;font-family:var(--font-heading,'Poppins',sans-serif);font-weight:600;color:var(--ink-100);padding:13px 16px;font-size:14px}
td{padding:12px 16px;border-top:1px solid var(--border-subtle);color:var(--text-body);vertical-align:top}
tbody tr:hover{background:rgba(255,255,255,.02)}

/* code */
pre{background:var(--navy-950);border:1px solid var(--border-subtle);border-radius:12px;padding:18px 20px;overflow-x:auto;margin:20px 0}
code{font-family:var(--font-numeric,'JetBrains Mono',monospace);font-size:14px;color:var(--teal-200)}
p code,li code{background:var(--navy-800);border:1px solid var(--border-subtle);border-radius:5px;padding:1px 6px;font-size:14px;color:var(--teal-200)}
pre code{background:none;border:none;padding:0;color:var(--ink-200);line-height:1.6}

/* TOC */
.toc{background:var(--surface-card);border:1px solid var(--border-subtle);border-radius:14px;padding:20px 24px;margin:30px 0}
.toc .k{font-family:var(--font-heading,'Poppins',sans-serif);font-weight:700;font-size:13px;letter-spacing:.08em;text-transform:uppercase;color:var(--text-muted);margin-bottom:12px}
.toc ol{margin:0;padding-left:20px;columns:2;column-gap:32px}
.toc li{margin:6px 0;font-size:14.5px}
.toc a{color:var(--text-body)}
.toc a:hover{color:var(--teal-400)}
@media(max-width:640px){.toc ol{columns:1}}

/* mid-article CTA */
.cta-band{background:linear-gradient(120deg,rgba(0,204,153,.10),rgba(0,95,153,.10));border:1px solid rgba(0,204,153,.24);
  border-radius:16px;padding:26px 28px;margin:38px 0;display:flex;flex-wrap:wrap;align-items:center;gap:18px;justify-content:space-between}
.cta-band .t{font-family:var(--font-heading,'Poppins',sans-serif);font-weight:700;font-size:19px;color:var(--text-heading)}
.cta-band .s{font-size:14.5px;color:var(--text-muted);margin-top:4px}

/* FAQ */
.faq{margin:36px 0}
.faq h2{font-size:28px;font-weight:700;margin-bottom:8px}
.faq details{border:1px solid var(--border-subtle);border-radius:12px;padding:2px 20px;margin:12px 0;background:var(--surface-card)}
.faq summary{cursor:pointer;font-family:var(--font-heading,'Poppins',sans-serif);font-weight:600;color:var(--ink-100);
  font-size:17px;padding:16px 0;list-style:none;display:flex;justify-content:space-between;gap:12px;align-items:center}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--teal-400);font-size:22px;font-weight:400;line-height:1}
.faq details[open] summary::after{content:"–"}
.faq details p{padding:0 0 18px;color:var(--text-body);font-size:15.5px;line-height:1.65}

/* author box + related */
.author-box{display:flex;gap:16px;align-items:flex-start;background:var(--surface-card);border:1px solid var(--border-subtle);border-radius:14px;padding:22px 24px;margin:40px 0}
.author-box img{width:52px;height:52px;border-radius:50%;border:1px solid var(--border-default);flex-shrink:0}
.author-box .n{font-family:var(--font-heading,'Poppins',sans-serif);font-weight:700;color:var(--text-heading)}
.author-box .r{font-size:13px;color:var(--teal-300);margin:2px 0 8px}
.author-box p{font-size:14.5px;color:var(--text-muted);line-height:1.6}

.related{margin:44px 0}
.related h2{font-size:24px;font-weight:700;margin-bottom:18px}
.related-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:18px}
.related a{display:flex;gap:14px;align-items:center;background:var(--surface-card);border:1px solid var(--border-subtle);border-radius:12px;padding:14px;transition:border-color .2s}
.related a:hover{border-color:var(--border-accent)}
.related a img{width:82px;height:52px;object-fit:cover;border-radius:8px;flex-shrink:0}
.related a span{font-family:var(--font-heading,'Poppins',sans-serif);font-weight:600;font-size:14.5px;color:var(--ink-100);line-height:1.35}

.end-cta{text-align:center;background:radial-gradient(120% 120% at 50% 0%,#14182a 0%,var(--navy-900) 70%);border:1px solid var(--border-subtle);border-radius:20px;padding:48px 28px;margin:44px 0 10px}
.end-cta h2{font-size:30px;font-weight:800;margin-bottom:10px}
.end-cta p{color:var(--text-muted);max-width:520px;margin:0 auto 22px;font-size:16.5px}

.disclaimer{font-size:12.5px;color:var(--text-subtle);border-top:1px solid var(--border-subtle);padding-top:20px;margin-top:40px;line-height:1.6}

/* footer (mirrors marketing site) */
footer{border-top:1px solid var(--border-subtle);background:var(--navy-950);padding:56px 0 36px;margin-top:20px}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:32px}
.foot-brand img{height:30px;margin-bottom:12px}
.foot-brand p{color:var(--text-muted);font-size:14px}
.foot-col h4{font-size:14px;color:var(--text-heading);margin-bottom:14px;font-weight:600}
.foot-col a{display:block;color:var(--text-muted);font-size:14px;margin:9px 0;transition:color .2s}
.foot-col a:hover{color:var(--teal-400)}
.foot-bottom{display:flex;flex-wrap:wrap;gap:14px;justify-content:space-between;align-items:center;border-top:1px solid var(--border-subtle);margin-top:38px;padding-top:24px;color:var(--text-subtle);font-size:13px}
@media(max-width:760px){.foot-grid{grid-template-columns:1fr 1fr}.nav-links{display:none}}

@media(max-width:520px){.blog-hero h1{font-size:32px}.prose h2{font-size:24px}}