/* ============================================================
   CryptoScanin — light theme stylesheet
   ============================================================ */
:root {
  --bg: #f6f8fb;
  --surface: #ffffff;
  --text: #1a2233;
  --muted: #5b6472;
  --border: #e2e8f0;
  --primary: #1d4ed8;
  --primary-dark: #14337e;
  --primary-soft: #eef4ff;
  --green: #059669;
  --green-soft: #ecfdf5;
  --red: #dc2626;
  --red-soft: #fef2f2;
  --amber-soft: #fffbeb;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(15, 23, 42, 0.08), 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 8px 24px rgba(15, 23, 42, 0.10);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
}

.container { max-width: 1120px; margin: 0 auto; padding: 0 20px; }
main { display: block; }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; }

h1, h2, h3, h4 { line-height: 1.25; color: var(--text); }
h1 { font-size: 1.9rem; margin: 0.4em 0 0.5em; }
h2 { font-size: 1.45rem; margin: 1.6em 0 0.6em; padding-bottom: 0.3em; border-bottom: 1px solid var(--border); }
h3 { font-size: 1.15rem; margin: 1.3em 0 0.5em; }
p { margin: 0.7em 0; }
ul, ol { margin: 0.7em 0; padding-left: 1.4em; }
li { margin: 0.35em 0; }

/* ---------- header / nav ---------- */
.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 50;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  height: 62px;
}
.brand {
  font-size: 1.3rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text);
}
.brand span, .footer-brand span { color: var(--primary); }
.brand:hover { text-decoration: none; }
.site-nav ul { display: flex; list-style: none; gap: 2px; margin: 0; padding: 0; align-items: center; flex-wrap: nowrap; white-space: nowrap; }
.site-nav a {
  display: inline-block;
  padding: 6px 8px;
  border-radius: 8px;
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 500;
}
.site-nav a:hover { color: var(--primary); background: var(--primary-soft); text-decoration: none; }
.nav-toggle { display: none; background: none; border: 1px solid var(--border); border-radius: 8px; padding: 6px 10px; font-size: 1rem; cursor: pointer; }

/* ---------- footer ---------- */
.site-footer { background: var(--surface); border-top: 1px solid var(--border); margin-top: 60px; }
.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 30px;
  padding: 40px 20px 20px;
}
.footer-brand { font-size: 1.15rem; font-weight: 800; margin: 0 0 8px; }
.footer-about p { color: var(--muted); font-size: 0.92rem; }
.footer-col h4 { font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); margin: 0 0 10px; }
.footer-col ul { list-style: none; margin: 0; padding: 0; }
.footer-col li { margin: 6px 0; }
.footer-col a { color: var(--muted); font-size: 0.92rem; }
.footer-col a:hover { color: var(--primary); }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 16px 20px 26px;
  color: var(--muted);
  font-size: 0.85rem;
}
.disclaimer { margin: 6px 0 0; font-size: 0.82rem; }

/* ---------- hero ---------- */
.hero {
  background: linear-gradient(180deg, var(--primary-soft) 0%, var(--bg) 100%);
  padding: 52px 0 40px;
  border-bottom: 1px solid var(--border);
}
.hero h1 { font-size: 2.3rem; margin: 0 0 0.35em; }
.hero-sub { font-size: 1.08rem; color: var(--muted); max-width: 720px; }
.hero-cta { display: flex; gap: 12px; margin-top: 22px; flex-wrap: wrap; }

/* ---------- buttons ---------- */
.btn {
  display: inline-block;
  background: var(--primary);
  color: #fff !important;
  padding: 10px 18px;
  border-radius: 9px;
  font-weight: 600;
  font-size: 0.95rem;
}
.btn:hover { background: var(--primary-dark); text-decoration: none; }
.btn.ghost { background: var(--surface); color: var(--primary) !important; border: 1px solid var(--border); }
.btn.ghost:hover { border-color: var(--primary); }

/* ---------- sections on home ---------- */
.featured, .cats, .latest { padding-top: 12px; }
.featured h2, .cats h2, .latest h2 { border-bottom: none; }
.feat-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 14px; }
.feat-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow);
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}
.feat-card:hover { text-decoration: none; transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.feat-cat { font-size: 0.72rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em; color: var(--primary); }
.feat-title { font-weight: 600; color: var(--text); font-size: 0.98rem; line-height: 1.4; }
.feat-date { font-size: 0.8rem; color: var(--muted); }

.cat-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 14px; }
.cat-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; box-shadow: var(--shadow); }
.cat-card:hover { text-decoration: none; border-color: var(--primary); }
.cat-card h3 { margin: 0 0 6px; font-size: 1.05rem; color: var(--primary); }
.cat-card p { margin: 0; color: var(--muted); font-size: 0.9rem; }

.brand-cta { padding: 10px 0 20px; }

/* ---------- listing pages ---------- */
.crumbs { font-size: 0.85rem; color: var(--muted); margin: 18px 0 -4px; }
.crumbs a { color: var(--muted); }
.crumbs a:hover { color: var(--primary); }
.page-blurb { color: var(--muted); max-width: 760px; margin-bottom: 26px; }
.list-outer { display: flex; flex-direction: column; gap: 12px; padding-bottom: 30px; }
.list-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
  box-shadow: var(--shadow);
}
.list-item h3 { margin: 0 0 4px; font-size: 1.05rem; }
.list-item h3 a { color: var(--text); }
.list-item h3 a:hover { color: var(--primary); }
.list-summary { margin: 0 0 8px; color: var(--muted); font-size: 0.92rem; }
.list-meta { display: flex; gap: 16px; font-size: 0.8rem; color: var(--muted); }

/* ---------- article layout ---------- */
.article-layout { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 28px; padding-top: 10px; }
.article-main { min-width: 0; }
.article-meta { display: flex; gap: 14px; align-items: center; flex-wrap: wrap; font-size: 0.85rem; color: var(--muted); margin-bottom: 14px; }
.meta-cat { font-weight: 700; color: var(--primary); }
.tag { display: inline-block; background: var(--primary-soft); color: var(--primary-dark) !important; font-size: 0.78rem; padding: 3px 9px; border-radius: 20px; margin-right: 6px; font-weight: 500; }
.tag:hover { text-decoration: none; background: #dbe7ff; }

/* quick answer / facts / toc */
.answer-box {
  background: var(--green-soft);
  border: 1px solid #a7f3d0;
  border-left: 5px solid var(--green);
  border-radius: var(--radius);
  padding: 14px 16px;
  margin: 16px 0;
  color: #064e3b;
}
.answer-box strong { display: block; margin-bottom: 4px; }

.fact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 10px;
  margin: 16px 0;
}
.fact-grid > div {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 14px;
  box-shadow: var(--shadow);
}
.fact-grid .fact-hl { border-color: #fecaca; background: var(--red-soft); }
.fact-label { font-size: 0.76rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--muted); }
.fact-value { font-size: 1.02rem; font-weight: 700; margin-top: 2px; }
.fact-hl .fact-value { color: var(--red); }

.toc {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 18px;
  margin: 18px 0;
  font-size: 0.92rem;
}
.toc-title { font-weight: 700; margin-bottom: 6px; }
.toc ul { list-style: none; margin: 0; padding: 0; columns: 2; column-gap: 24px; }
.toc li { margin: 4px 0; }
.toc a { color: var(--muted); }
.toc a:hover { color: var(--primary); }

/* tables */
.table-wrap { overflow-x: auto; margin: 16px 0; }
table {
  width: 100%;
  border-collapse: collapse;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.92rem;
}
th, td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--border); }
th { background: #f1f5f9; font-weight: 700; }
tbody tr:last-child td { border-bottom: none; }
th.hl, td.hl { background: var(--primary-soft); }
table.glossary td.g-term { font-weight: 700; width: 38%; }

/* stats */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 12px; margin: 18px 0; }
.stat {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  text-align: center;
  box-shadow: var(--shadow);
}
.stat-num { font-size: 1.35rem; font-weight: 800; color: var(--primary-dark); }
.stat-label { font-size: 0.8rem; color: var(--muted); margin-top: 3px; }
.stat-extra { font-size: 0.75rem; color: var(--green); margin-top: 2px; font-weight: 600; }

/* cards / steps / boxes */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 12px; margin: 16px 0; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px 16px; box-shadow: var(--shadow); }
.card h4 { margin: 0 0 6px; font-size: 1rem; color: var(--primary); }
.card p { margin: 0; font-size: 0.9rem; color: var(--muted); }

ol.steps { counter-reset: step; list-style: none; padding-left: 0; }
ol.steps li { counter-increment: step; position: relative; padding: 10px 14px 10px 52px; margin: 8px 0; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); }
ol.steps li::before { content: counter(step); position: absolute; left: 14px; top: 12px; width: 26px; height: 26px; background: var(--primary); color: #fff; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 0.85rem; }

.highlight-box { background: var(--amber-soft); border: 1px solid #fde68a; border-left: 5px solid #d97706; border-radius: var(--radius); padding: 14px 16px; margin: 16px 0; color: #78350f; }
.tip-box { background: var(--primary-soft); border: 1px solid #bfdbfe; border-left: 5px solid var(--primary); border-radius: var(--radius); padding: 14px 16px; margin: 16px 0; color: #1e3a8a; }

.formula { background: #0f172a; color: #e2e8f0; font-family: "SF Mono", Consolas, "Courier New", monospace; border-radius: var(--radius); padding: 14px 16px; margin: 16px 0; overflow-x: auto; font-size: 0.92rem; }
.formula::before { content: "COST MODEL  "; color: #38bdf8; font-weight: 700; }

.flow { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin: 16px 0; font-size: 0.92rem; }
.flow span { background: var(--surface); border: 1px solid var(--border); border-radius: 8px; padding: 7px 12px; }
.flow-arrow { color: var(--primary); font-weight: 700; }

.myths { display: grid; gap: 12px; margin: 16px 0; }
.myth-card { background: var(--surface); border: 1px solid var(--border); border-left: 5px solid var(--red); border-radius: var(--radius); padding: 12px 16px; }
.myth-card p { margin: 4px 0; }
.myth-tag { font-weight: 800; color: var(--red); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.05em; }
.fact-tag { font-weight: 800; color: var(--green); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.05em; margin-top: 6px; }

ul.checklist { list-style: none; padding-left: 4px; }
ul.checklist li { margin: 8px 0; }
.cb { color: var(--green); font-weight: 700; margin-right: 8px; }

.takeaways { background: var(--primary-soft); border: 1px solid #bfdbfe; border-radius: var(--radius); padding: 16px 18px; margin: 18px 0; }
.tk-title { font-weight: 800; color: var(--primary-dark); margin-bottom: 6px; text-transform: uppercase; font-size: 0.8rem; letter-spacing: 0.05em; }
.takeaways ul { margin: 0; padding-left: 1.2em; }

/* FAQ */
.faq { margin: 26px 0; }
.faq-item { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); margin: 10px 0; overflow: hidden; }
.faq-item summary { cursor: pointer; padding: 13px 16px; font-weight: 600; list-style: none; position: relative; padding-right: 40px; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; position: absolute; right: 16px; top: 10px; font-size: 1.3rem; color: var(--primary); font-weight: 700; }
.faq-item[open] summary::after { content: "\2212"; }
.faq-item p { margin: 0; padding: 0 16px 14px; color: var(--muted); }

/* sources / author / related */
.sources { margin: 30px 0; }
.sources ol { color: var(--muted); font-size: 0.9rem; }
.reviewed { font-size: 0.82rem; color: var(--muted); font-style: italic; }
.author-box {
  display: flex;
  gap: 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  margin: 26px 0;
}
.author-avatar { width: 46px; height: 46px; border-radius: 50%; background: var(--primary); color: #fff; display: flex; align-items: center; justify-content: center; font-weight: 800; flex-shrink: 0; }
.author-box p { margin: 4px 0 0; color: var(--muted); font-size: 0.9rem; }

.related { margin: 28px 0; }
.rel-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.rel-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 12px 14px; }
.rel-card a { font-weight: 600; font-size: 0.92rem; color: var(--text); }
.rel-card a:hover { color: var(--primary); }
.rel-card p { margin: 5px 0 6px; color: var(--muted); font-size: 0.85rem; }
.rel-date { font-size: 0.76rem; color: var(--muted); }

/* ---------- fee widget ---------- */
.sidebar { min-width: 0; }
.widget-card { position: sticky; top: 78px; }
.fee-widget {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  padding: 16px;
}
.fw-head { font-weight: 800; font-size: 0.95rem; margin-bottom: 12px; color: var(--primary-dark); }
.fw-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.fw-3 { grid-template-columns: 1fr 1fr 1fr; }
.fw-dashboard .fw-grid { grid-template-columns: repeat(4, 1fr); }
.fw-stat { background: var(--bg); border: 1px solid var(--border); border-radius: 8px; padding: 10px 12px; }
.fw-num { font-size: 1.05rem; font-weight: 800; color: var(--text); line-height: 1.3; }
.fw-label { font-size: 0.72rem; color: var(--muted); margin-top: 3px; line-height: 1.5; }
.live-badge { display: inline-block; background: var(--green-soft); color: var(--green); font-size: 0.62rem; font-weight: 800; padding: 1px 6px; border-radius: 10px; vertical-align: 1px; }
.ref-badge { display: inline-block; background: var(--amber-soft); color: #b45309; font-size: 0.62rem; font-weight: 800; padding: 1px 6px; border-radius: 10px; vertical-align: 1px; }
.fw-note { font-size: 0.76rem; color: var(--muted); margin: 12px 0 10px; }
.fw-cta {
  display: block;
  text-align: center;
  background: var(--primary);
  color: #fff !important;
  border-radius: 8px;
  padding: 9px 12px;
  font-weight: 700;
  font-size: 0.88rem;
}
.fw-cta:hover { background: var(--primary-dark); text-decoration: none; }

/* dashboard on home */
.dashboard { margin: 24px 0; }
.dashboard .fw-grid { grid-template-columns: repeat(4, 1fr); }

/* ---------- page body (about/contact) ---------- */
.page-body { max-width: 860px; padding-top: 10px; padding-bottom: 40px; }

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  .article-layout { grid-template-columns: 1fr; }
  .sidebar { display: none; }
  .footer-inner { grid-template-columns: 1fr; }
  .fw-dashboard .fw-grid, .dashboard .fw-grid { grid-template-columns: repeat(2, 1fr); }
  .rel-grid { grid-template-columns: 1fr; }
}
@media (max-width: 880px) {
  .nav-toggle { display: block; }
  .site-nav { display: none; width: 100%; position: absolute; top: 62px; left: 0; background: var(--surface); border-bottom: 1px solid var(--border); padding: 10px 20px 14px; }
  .site-nav.open { display: block; }
  .site-nav ul { flex-direction: column; align-items: flex-start; }
  .header-inner { flex-wrap: wrap; }
  .hero h1 { font-size: 1.7rem; }
  .toc ul { columns: 1; }
}