/* ============================================================
   Small-Cap M&A Thesis — ledger design system
   Navy = sourced fact · Brass = our estimate/derivation
   ============================================================ */
:root {
  --paper: #FBFAF7;
  --card: #FFFFFF;
  --ink: #15191F;
  --muted: #5C6470;
  --navy: #16324F;
  --navy-soft: #2C4E73;
  --band: #C9D7E4;
  --band-soft: #E4EBF2;
  --brass: #A87B22;
  --brass-soft: #F4ECDC;
  --rule: #D9D4C9;
  --max: 1080px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 16.5px;
  line-height: 1.65;
}
img { max-width: 100%; }

h1, h2, h3 { font-family: "Fraunces", Georgia, serif; color: var(--navy); line-height: 1.15; }
h1 { font-size: clamp(2.1rem, 4.5vw, 3.4rem); font-weight: 600; letter-spacing: -0.01em; margin: 0 0 0.5rem; }
h2 { font-size: clamp(1.5rem, 2.6vw, 2.05rem); font-weight: 600; margin: 0 0 0.9rem; }
h3 { font-size: 1.18rem; font-weight: 600; margin: 1.6rem 0 0.5rem; }
p { margin: 0 0 1rem; max-width: 70ch; }
a { color: var(--navy-soft); }
strong { color: var(--navy); }
.mono { font-family: "IBM Plex Mono", ui-monospace, Menlo, monospace; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 24px; }

/* ---------- Nav ---------- */
.topnav { background: var(--paper); border-bottom: 2px solid var(--navy); position: sticky; top: 0; z-index: 50; }
.topnav .wrap { display: flex; align-items: baseline; gap: 1.4rem; flex-wrap: wrap; padding-top: 14px; padding-bottom: 12px; }
.brand { font-family: "Fraunces", Georgia, serif; font-weight: 700; font-size: 1.06rem; color: var(--navy); text-decoration: none; margin-right: auto; }
.topnav a.nav-link {
  font-family: "IBM Plex Mono", monospace; font-size: 0.74rem; letter-spacing: 0.09em;
  text-transform: uppercase; text-decoration: none; color: var(--muted); padding-bottom: 2px;
}
.topnav a.nav-link:hover { color: var(--navy); }
.topnav a.nav-link.active { color: var(--navy); border-bottom: 2px solid var(--brass); }

/* ---------- Eyebrow / rules ---------- */
.eyebrow {
  font-family: "IBM Plex Mono", monospace; font-size: 0.72rem; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--brass); margin: 0 0 0.6rem;
}
.rule { border: 0; border-top: 1px solid var(--rule); margin: 2.6rem 0; }
section { padding: 2.6rem 0 0.6rem; }
.lede { font-size: 1.14rem; color: #2A3340; max-width: 62ch; }

/* ---------- Source chips ---------- */
.src {
  font-family: "IBM Plex Mono", monospace; font-size: 0.66rem; letter-spacing: 0.07em;
  text-transform: uppercase; text-decoration: none; white-space: nowrap;
  color: var(--navy-soft); background: var(--band-soft);
  border: 1px solid var(--band); border-radius: 3px; padding: 1.5px 7px 2.5px;
  vertical-align: 0.12em; margin-left: 0.25rem;
}
.src:hover { background: var(--band); color: var(--navy); }
.src.est, .src.der {
  color: var(--brass); background: var(--brass-soft); border-color: #E0CFA4;
}
.src.est:hover, .src.der:hover { background: #EDE0C2; }
.src .arrow { font-size: 0.72rem; }

/* ---------- Hero ---------- */
.hero { padding: 4.2rem 0 2.6rem; }
.hero .sub { font-size: 1.22rem; color: #2A3340; max-width: 60ch; margin-top: 0.9rem; }

/* Signature: the count strip */
.count-strip { margin: 2.6rem 0 0.6rem; }
.count-strip .bar {
  display: flex; height: 74px; border: 1.5px solid var(--navy); border-radius: 4px; overflow: hidden;
  background: var(--card);
}
.count-strip .seg { display: flex; align-items: center; padding: 0 14px; min-width: 0; }
.count-strip .seg.large { background: var(--navy); color: #fff; flex: 0 0 15.6%; }
.count-strip .seg.small { background: var(--band); color: var(--navy); flex: 1 1 auto; }
.count-strip .seg .lab { font-family: "IBM Plex Mono", monospace; font-size: 0.74rem; line-height: 1.35; letter-spacing: 0.03em; }
.count-strip .seg .lab b { display: block; font-size: 1.02rem; }
.count-strip .legend { margin-top: 0.55rem; font-size: 0.86rem; color: var(--muted); }
@media (prefers-reduced-motion: no-preference) {
  .count-strip .seg.small { animation: grow 1.1s ease-out; transform-origin: left; }
  @keyframes grow { from { flex-basis: 16%; } to { flex-basis: auto; } }
}

/* ---------- Stat grid ---------- */
.stat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin: 1.4rem 0; }
.stat {
  background: var(--card); border: 1px solid var(--rule); border-top: 3px solid var(--navy);
  border-radius: 4px; padding: 16px 18px 13px;
}
.stat .scope { display: block; font-family: "IBM Plex Mono", monospace; font-size: 0.62rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); margin-bottom: 0.4rem; }
.stat .num { font-family: "IBM Plex Mono", monospace; font-size: 1.9rem; font-weight: 600; color: var(--navy); letter-spacing: -0.02em; }
.stat .lab { font-size: 0.92rem; color: #2A3340; margin: 0.25rem 0 0.55rem; line-height: 1.45; }
.stat.estimate { border-top-color: var(--brass); }
.stat.estimate .num { color: var(--brass); }

/* Derived strip on home */
.derived-strip {
  background: var(--brass-soft); border: 1px solid #E0CFA4; border-left: 4px solid var(--brass);
  border-radius: 4px; padding: 16px 20px; margin: 1.6rem 0;
}
.derived-strip .row { display: flex; flex-wrap: wrap; gap: 1.6rem 3rem; }
.derived-strip .num { font-family: "IBM Plex Mono", monospace; font-size: 1.45rem; font-weight: 600; color: var(--brass); }
.derived-strip .lab { font-size: 0.88rem; color: #5d4a1d; }

/* ---------- Argument steps ---------- */
.argument { counter-reset: step; }
.arg-step { display: grid; grid-template-columns: 56px 1fr; gap: 18px; padding: 1.1rem 0; border-top: 1px solid var(--rule); }
.arg-step:last-child { border-bottom: 1px solid var(--rule); }
.arg-step .n {
  counter-increment: step; font-family: "Fraunces", serif; font-size: 2rem; color: var(--band);
  font-weight: 700; line-height: 1;
}
.arg-step .n::before { content: counter(step, decimal-leading-zero); }
.arg-step h3 { margin: 0 0 0.35rem; }
.arg-step p { margin: 0; }

/* ---------- Cards / explore ---------- */
.explore { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; margin: 1.2rem 0 2.4rem; }
.explore a.card {
  display: block; background: var(--card); border: 1px solid var(--rule); border-radius: 4px;
  padding: 18px 20px; text-decoration: none; color: var(--ink); transition: border-color .15s;
}
.explore a.card:hover { border-color: var(--navy); }
.explore .card .kicker { font-family: "IBM Plex Mono", monospace; font-size: 0.68rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--brass); }
.explore .card h3 { margin: 0.3rem 0 0.3rem; }
.explore .card p { margin: 0; font-size: 0.92rem; color: var(--muted); }

/* ---------- Tables ---------- */
.table-wrap { overflow-x: auto; margin: 1.1rem 0 0.4rem; }
table.data { border-collapse: collapse; width: 100%; background: var(--card); border: 1px solid var(--rule); font-size: 0.92rem; }
table.data th {
  background: var(--navy); color: #fff; text-align: left; padding: 9px 12px;
  font-family: "IBM Plex Mono", monospace; font-size: 0.7rem; letter-spacing: 0.08em; text-transform: uppercase; font-weight: 500;
}
table.data td { padding: 9px 12px; border-top: 1px solid var(--rule); vertical-align: top; }
table.data tr:nth-child(even) td { background: #F6F4EE; }
table.data td.num { font-family: "IBM Plex Mono", monospace; white-space: nowrap; }
.tbl-note { font-size: 0.84rem; color: var(--muted); margin: 0.5rem 0 0; max-width: 80ch; }

/* ---------- Chart cards ---------- */
.chart-card { background: var(--card); border: 1px solid var(--rule); border-radius: 4px; padding: 18px 18px 12px; margin: 1.4rem 0; }
.chart-card .chart-title { font-family: "Fraunces", serif; font-weight: 600; color: var(--navy); font-size: 1.05rem; margin: 0 0 0.7rem; }
.chart-box { position: relative; height: 330px; }
.chart-box.tall { height: 430px; }
.chart-card .data-note { font-size: 0.8rem; color: var(--muted); margin: 0.7rem 0 0.2rem; }

/* ---------- Callouts ---------- */
.estimate-panel {
  background: var(--brass-soft); border: 1px solid #E0CFA4; border-left: 4px solid var(--brass);
  border-radius: 4px; padding: 16px 20px; margin: 1.5rem 0;
}
.estimate-panel .tag { font-family: "IBM Plex Mono", monospace; font-size: 0.68rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--brass); }
.estimate-panel p { margin: 0.4rem 0 0; }
.takeaway {
  background: var(--card); border: 1px solid var(--rule); border-left: 4px solid var(--navy);
  border-radius: 4px; padding: 16px 20px; margin: 1.5rem 0;
}
.takeaway .tag { font-family: "IBM Plex Mono", monospace; font-size: 0.68rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--navy-soft); }
.takeaway p { margin: 0.4rem 0 0; }

/* ---------- Method page ---------- */
.method-list { padding-left: 1.2rem; }
.method-list li { margin-bottom: 0.7rem; max-width: 75ch; }
.anchor-offset { scroll-margin-top: 90px; }
.sources-group h3 { margin-top: 1.8rem; }
.sources-group ul { list-style: none; padding: 0; margin: 0.4rem 0 0; }
.sources-group li { padding: 0.32rem 0; border-bottom: 1px dotted var(--rule); font-size: 0.92rem; }
.sources-group li a { color: var(--navy-soft); text-decoration: none; }
.sources-group li a:hover { text-decoration: underline; }
.sources-group .what { color: var(--muted); font-size: 0.84rem; }

/* ---------- Footer ---------- */
footer { margin-top: 3.5rem; border-top: 2px solid var(--navy); background: var(--card); }
footer .wrap { padding-top: 1.4rem; padding-bottom: 1.8rem; font-size: 0.86rem; color: var(--muted); }
footer .legend { margin-bottom: 0.5rem; }
footer .chipline .src { margin-left: 0; margin-right: 0.4rem; }

/* ---------- Focus & responsive ---------- */
a:focus-visible, button:focus-visible { outline: 2px solid var(--brass); outline-offset: 2px; }
@media (max-width: 860px) {
  .stat-grid { grid-template-columns: 1fr 1fr; }
  .explore { grid-template-columns: 1fr; }
  .arg-step { grid-template-columns: 40px 1fr; }
  .count-strip .seg.large { flex-basis: 26%; }
}
@media (max-width: 560px) {
  .stat-grid { grid-template-columns: 1fr; }
  body { font-size: 15.5px; }
}

/* ---------- Nav logout (Django) ---------- */
.nav-logout { margin: 0; display: inline-flex; align-items: baseline; }
.topnav .logout-btn {
  font-family: "IBM Plex Mono", monospace; font-size: 0.74rem; letter-spacing: 0.09em;
  text-transform: uppercase; color: var(--muted); background: none; border: 0;
  padding: 0 0 2px; cursor: pointer;
}
.topnav .logout-btn:hover { color: var(--navy); }

/* ---------- Login / auth (Django) ---------- */
.auth-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 24px; }
.auth-card {
  width: 100%; max-width: 380px; background: var(--card);
  border: 1px solid var(--rule); border-top: 3px solid var(--navy);
  border-radius: 4px; padding: 28px 30px 30px;
}
.auth-card h1 { font-size: 1.55rem; margin: 0 0 0.25rem; }
.auth-sub { color: var(--muted); font-size: 0.9rem; margin: 0 0 1.3rem; }
.auth-field { margin-bottom: 1rem; }
.auth-card label {
  display: block; font-family: "IBM Plex Mono", monospace; font-size: 0.7rem;
  letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); margin-bottom: 0.3rem;
}
.auth-card input {
  width: 100%; font-family: "Inter", system-ui, sans-serif; font-size: 1rem;
  padding: 9px 11px; border: 1px solid var(--rule); border-radius: 3px;
  background: var(--paper); color: var(--ink);
}
.auth-card input:focus { outline: 2px solid var(--brass); outline-offset: 1px; border-color: var(--navy); }
.auth-submit {
  width: 100%; margin-top: 0.4rem; font-family: "IBM Plex Mono", monospace; font-size: 0.78rem;
  letter-spacing: 0.08em; text-transform: uppercase; background: var(--navy); color: #fff;
  border: 0; border-radius: 3px; padding: 11px; cursor: pointer;
}
.auth-submit:hover { background: var(--navy-soft); }
.auth-alert {
  background: #FBEAE7; border: 1px solid #E9B9B0; color: #8A2417;
  border-radius: 3px; padding: 9px 12px; margin-bottom: 1rem; font-size: 0.88rem;
}
.auth-field-error { color: #9A2515; font-size: 0.82rem; margin-top: 0.3rem; }