/* ============================================================
   BuyerTell — shared design system for content pages
   (index.html keeps its own inline copy so it stays self-contained
    and artifact-portable; new multi-page content links this file.)
   ============================================================ */
:root {
  color-scheme: dark;
  --ink:    #0A0D13;
  --ink-2:  #0E1220;
  --ink-3:  #141a2b;
  --line:   rgba(233,231,224,0.09);
  --line-2: rgba(233,231,224,0.16);
  --gold:   #FFC24B;
  --gold-d: #E0972A;
  --scan:   #46C7C0;
  --hot:    #FF6B4A;
  --good:   #5FD08A;
  --text:   #ECEAE3;
  --dim:    #99A0B0;
  --faint:  #5A6273;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  --sans: "Helvetica Neue", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
  --maxw: 1180px;
  --readw: 720px;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background:
    radial-gradient(1200px 700px at 78% -8%, rgba(255,194,75,0.07), transparent 60%),
    radial-gradient(900px 900px at 12% 108%, rgba(70,199,192,0.06), transparent 55%),
    var(--ink);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
::selection { background: rgba(255,194,75,0.28); color: #fff; }
a { color: inherit; text-decoration: none; }

.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 28px; }
.mono { font-family: var(--mono); }
.eyebrow { font-family: var(--mono); font-size: 12px; letter-spacing: 0.28em; text-transform: uppercase; color: var(--gold); }
.eyebrow .dot { color: var(--scan); }
.scan { color: var(--scan); }
.gold { color: var(--gold); }

/* ---------- NAV ---------- */
nav {
  position: sticky; top: 0; z-index: 40;
  backdrop-filter: blur(14px);
  background: linear-gradient(var(--ink), rgba(10,13,19,0.55));
  border-bottom: 1px solid var(--line);
}
.nav-in { display: flex; align-items: center; justify-content: space-between; height: 66px; }
.brand { display: flex; align-items: center; gap: 12px; }
.brand .glyph {
  width: 30px; height: 30px; border-radius: 50%; border: 1.5px solid var(--gold);
  position: relative; flex: none;
  box-shadow: 0 0 18px rgba(255,194,75,0.35), inset 0 0 10px rgba(255,194,75,0.12);
}
.brand .glyph::before, .brand .glyph::after { content: ""; position: absolute; background: rgba(255,194,75,0.5); }
.brand .glyph::before { left: 50%; top: 3px; bottom: 3px; width: 1px; transform: translateX(-50%); }
.brand .glyph::after  { top: 50%; left: 3px; right: 3px; height: 1px; transform: translateY(-50%); }
.brand .sweep-mini {
  position: absolute; inset: 0; border-radius: 50%;
  background: conic-gradient(from 0deg, transparent 0deg, rgba(255,194,75,0.55) 40deg, transparent 60deg);
  animation: spin 3.6s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.brand b { font-size: 15px; letter-spacing: -0.01em; font-weight: 700; }
.brand span { font-family: var(--mono); font-size: 11px; color: var(--faint); letter-spacing: 0.12em; display: block; margin-top: -2px; }
.nav-links { display: flex; align-items: center; gap: 26px; font-family: var(--mono); font-size: 13px; color: var(--dim); }
.nav-links a:hover { color: var(--text); }

.btn {
  font-family: var(--mono); font-size: 13px; letter-spacing: 0.02em;
  padding: 10px 18px; border-radius: 8px; cursor: pointer;
  border: 1px solid var(--gold); color: var(--ink); background: var(--gold);
  font-weight: 600; transition: transform .15s ease, box-shadow .2s ease; display: inline-block;
}
.btn:hover { transform: translateY(-1px); box-shadow: 0 8px 30px rgba(255,194,75,0.28); }
.btn.ghost { background: transparent; color: var(--text); border-color: var(--line-2); box-shadow: none; }
.btn.ghost:hover { border-color: var(--gold); color: var(--gold); }
@media (max-width: 760px){ .nav-links a:not(.btn){ display:none; } }

/* ---------- PAGE HEADER / HERO ---------- */
.page-head { padding: 60px 0 28px; }
.page-head h1 {
  font-family: var(--sans); font-weight: 800; letter-spacing: -0.03em;
  font-size: clamp(32px, 5vw, 56px); line-height: 1.02; margin: 16px 0 0; text-wrap: balance;
}
.page-head h1 .em {
  background: linear-gradient(94deg, var(--gold), #ffd98a 55%, var(--gold-d));
  -webkit-background-clip: text; background-clip: text; color: transparent;
  font-style: italic; font-family: var(--serif); font-weight: 700;
}
.page-head .lede { color: var(--dim); font-size: clamp(16px, 1.6vw, 19px); margin: 20px 0 0; max-width: 40em; }

/* ---------- BREADCRUMB ---------- */
.crumb { font-family: var(--mono); font-size: 12px; color: var(--faint); letter-spacing: 0.04em; padding-top: 26px; }
.crumb a:hover { color: var(--gold); }
.crumb .sep { margin: 0 8px; color: var(--line-2); }

/* ---------- SECTION SCAFFOLD ---------- */
section { position: relative; padding: 56px 0; }
.sec-head { max-width: 40em; margin-bottom: 34px; }
.sec-head h2 {
  font-family: var(--sans); font-weight: 800; letter-spacing: -0.025em;
  font-size: clamp(24px, 3.2vw, 36px); line-height: 1.06; margin: 12px 0 0; text-wrap: balance;
}
.sec-head p { color: var(--dim); font-size: 16px; margin: 12px 0 0; max-width: 34em; }
.rule { height: 1px; background: linear-gradient(90deg, var(--line-2), transparent); border: 0; margin: 0; }

/* ---------- PROSE (articles) ---------- */
.prose { max-width: var(--readw); }
.prose > * + * { margin-top: 20px; }
.prose h2 { font-family: var(--sans); font-weight: 800; letter-spacing: -0.02em; font-size: 26px; line-height: 1.12; margin-top: 44px; }
.prose h3 { font-family: var(--sans); font-weight: 700; letter-spacing: -0.01em; font-size: 19px; margin-top: 32px; }
.prose p, .prose li { color: var(--dim); font-size: 16.5px; line-height: 1.7; }
.prose strong, .prose b { color: var(--text); font-weight: 600; }
.prose a { color: var(--gold); border-bottom: 1px solid rgba(255,194,75,0.35); }
.prose a:hover { border-bottom-color: var(--gold); }
.prose ul, .prose ol { padding-left: 22px; margin: 18px 0; display: flex; flex-direction: column; gap: 10px; }
.prose code { font-family: var(--mono); font-size: 0.9em; color: var(--scan); background: rgba(70,199,192,0.08); padding: 1px 6px; border-radius: 4px; }
.prose blockquote {
  margin: 26px 0; padding: 4px 0 4px 20px; border-left: 2px solid var(--gold);
  font-family: var(--serif); font-size: 19px; color: var(--text); font-style: italic;
}
.prose .lead { font-family: var(--serif); font-size: 20px; color: var(--text); line-height: 1.6; }
.prose figure { margin: 26px 0; }
.prose hr { border: 0; height: 1px; background: var(--line); margin: 36px 0; }

/* ---------- CALLOUT / CARD ---------- */
.callout {
  border: 1px solid var(--line-2); border-left: 2px solid var(--scan); border-radius: 0 12px 12px 0;
  background: var(--ink-2); padding: 18px 22px; margin: 26px 0;
}
.callout .k { font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--scan); }
.callout p { margin: 8px 0 0; color: var(--dim); font-size: 15px; }
.card { border: 1px solid var(--line); border-radius: 14px; background: var(--ink-2); padding: 22px; }

/* ---------- COMPARISON TABLE ---------- */
.cmp-wrap { overflow-x: auto; margin: 8px 0; border: 1px solid var(--line); border-radius: 14px; }
table.cmp { width: 100%; border-collapse: collapse; font-size: 14.5px; min-width: 560px; }
table.cmp th, table.cmp td { text-align: left; padding: 14px 18px; border-bottom: 1px solid var(--line); vertical-align: top; }
table.cmp thead th { font-family: var(--mono); font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--faint); background: var(--ink-2); }
table.cmp thead th.us { color: var(--gold); }
table.cmp tbody tr:last-child td { border-bottom: 0; }
table.cmp td.feature { color: var(--text); font-weight: 600; }
table.cmp td { color: var(--dim); }
table.cmp .yes { color: var(--good); } table.cmp .no { color: var(--hot); }
table.cmp col.us-col, table.cmp td.us-cell, table.cmp th.us { background: rgba(255,194,75,0.05); }

/* ---------- POST LIST (blog hub) ---------- */
.posts { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.post {
  border: 1px solid var(--line); border-radius: 16px; background: var(--ink-2); padding: 26px;
  transition: border-color .2s, transform .2s; display: flex; flex-direction: column; gap: 10px;
}
.post:hover { border-color: rgba(255,194,75,0.35); transform: translateY(-3px); }
.post .tag { font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--scan); }
.post h3 { font-family: var(--sans); font-weight: 800; letter-spacing: -0.02em; font-size: 21px; margin: 0; line-height: 1.15; }
.post p { margin: 0; color: var(--dim); font-size: 14.5px; }
.post .more { font-family: var(--mono); font-size: 12.5px; color: var(--gold); margin-top: auto; }
@media (max-width: 720px){ .posts { grid-template-columns: 1fr; } }

/* ---------- CTA ---------- */
.cta-block {
  border: 1px solid var(--line-2); border-radius: 22px; padding: 48px 36px; text-align: center;
  background: radial-gradient(90% 140% at 50% -20%, rgba(255,194,75,0.12), transparent 60%), var(--ink-2);
  margin: 20px 0;
}
.cta-block h2 { font-family: var(--sans); font-weight: 800; letter-spacing: -0.03em; font-size: clamp(26px, 4vw, 40px); margin: 0; line-height: 1.04; text-wrap: balance; }
.cta-block h2 .em { font-family: var(--serif); font-style: italic; font-weight: 700; background: linear-gradient(94deg, var(--gold), #ffd98a); -webkit-background-clip: text; background-clip: text; color: transparent; }
.cta-block p { color: var(--dim); max-width: 32em; margin: 14px auto 26px; font-size: 16px; }
.cta-row { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* ---------- FOOTER ---------- */
footer { border-top: 1px solid var(--line); padding: 34px 0 50px; margin-top: 20px; }
.foot-in { display: flex; justify-content: space-between; align-items: center; gap: 20px; flex-wrap: wrap; font-family: var(--mono); font-size: 12px; color: var(--faint); letter-spacing: 0.03em; }
.foot-in a:hover { color: var(--gold); }
.foot-in b { color: var(--dim); font-weight: 400; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
}