/* ==========================================================================
   CRS Calculator — shared design system
   Palette: institutional navy + warm paper + restrained maple-red accent
   Display: Bricolage Grotesque · Body: Inter
   ========================================================================== */

:root {
  --ink:        #14202e;   /* deep slate navy — header, footer, score panel */
  --ink-2:      #1d2d3f;
  --paper:      #fbfaf7;   /* warm off-white page background */
  --surface:    #ffffff;
  --surface-2:  #f4f1ea;   /* subtle warm panel */
  --maple:      #c8453b;   /* restrained Canadian red accent */
  --maple-dk:   #a8352c;
  --pine:       #2e7d5b;   /* positive / competitive score */
  --amber:      #c0801c;   /* borderline */
  --text:       #1b2530;
  --muted:      #5a6675;
  --muted-2:    #7c8794;
  --line:       #e7e3db;
  --line-2:     #d9d4c8;
  --focus:      #2f6df0;

  --radius:     14px;
  --radius-sm:  9px;
  --shadow:     0 1px 2px rgba(20,32,46,.04), 0 8px 24px rgba(20,32,46,.06);
  --shadow-lg:  0 12px 40px rgba(20,32,46,.12);

  --maxw: 1140px;
  --font-display: "Bricolage Grotesque", "Inter", system-ui, sans-serif;
  --font-body: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--text);
  background: var(--paper);
  line-height: 1.6;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; display: block; }

a { color: var(--maple-dk); text-underline-offset: 2px; }
a:hover { color: var(--maple); }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.018em;
  color: var(--ink);
  margin: 0 0 .5em;
}
h1 { font-size: clamp(2rem, 4.2vw, 3rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.05rem); margin-top: 0; }
h3 { font-size: 1.22rem; letter-spacing: -0.01em; }
h4 { font-size: 1.02rem; }

p { margin: 0 0 1.05em; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 22px; }
.narrow { max-width: 760px; margin-left: auto; margin-right: auto; }

.eyebrow {
  font-family: var(--font-display);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .14em;
  font-size: .72rem;
  color: var(--maple);
  margin: 0 0 .9rem;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(251,250,247,.86);
  backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav {
  display: flex; align-items: center; gap: 18px;
  height: 64px;
}
.brand {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--font-display); font-weight: 800;
  font-size: 1.12rem; color: var(--ink); text-decoration: none;
  letter-spacing: -0.02em; margin-right: auto;
}
.brand:hover { color: var(--ink); }
.brand .leaf { width: 26px; height: 26px; flex: none; }
.nav-links { display: flex; align-items: center; gap: 22px; }
.nav-links a {
  color: var(--muted); text-decoration: none; font-size: .94rem; font-weight: 500;
}
.nav-links a:hover, .nav-links a.active { color: var(--ink); }
.nav-cta {
  background: var(--ink); color: #fff !important; padding: 9px 16px;
  border-radius: 999px; font-weight: 600; font-size: .9rem;
}
.nav-cta:hover { background: var(--ink-2); }
.nav-toggle { display: none; background: none; border: 0; cursor: pointer; padding: 8px; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--ink); margin: 4px 0; }

@media (max-width: 880px) {
  .nav-links {
    position: absolute; top: 64px; left: 0; right: 0;
    flex-direction: column; align-items: flex-start; gap: 0;
    background: var(--surface); border-bottom: 1px solid var(--line);
    padding: 8px 22px 18px; display: none; box-shadow: var(--shadow);
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 11px 0; width: 100%; border-bottom: 1px solid var(--line); }
  .nav-links .nav-cta { margin-top: 12px; border-bottom: 0; text-align: center; }
  .nav-toggle { display: block; }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-display); font-weight: 600; font-size: .98rem;
  padding: 12px 22px; border-radius: 999px; border: 1px solid transparent;
  cursor: pointer; text-decoration: none; transition: transform .08s ease, background .15s ease;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--maple); color: #fff; }
.btn-primary:hover { background: var(--maple-dk); color: #fff; }
.btn-ink { background: var(--ink); color: #fff; }
.btn-ink:hover { background: var(--ink-2); color: #fff; }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--line-2); }
.btn-ghost:hover { background: var(--surface-2); color: var(--ink); }

/* ---------- Generic sections ---------- */
section { padding: 64px 0; }
.section-tight { padding: 44px 0; }
.bg-ink { background: var(--ink); color: #e8edf3; }
.bg-ink h1, .bg-ink h2, .bg-ink h3 { color: #fff; }
.bg-paper2 { background: var(--surface-2); }

.lead { font-size: 1.16rem; color: var(--muted); }

.card {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 26px; box-shadow: var(--shadow);
}

.grid { display: grid; gap: 22px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 860px) { .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; } }

/* ---------- Article / prose ---------- */
.prose { max-width: 760px; margin: 0 auto; }
.prose h2 { margin-top: 1.8em; }
.prose h3 { margin-top: 1.5em; }
.prose ul, .prose ol { padding-left: 1.25em; margin: 0 0 1.1em; }
.prose li { margin-bottom: .45em; }
.prose table { width: 100%; border-collapse: collapse; margin: 1.2em 0; font-size: .94rem; }
.prose th, .prose td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); }
.prose th { background: var(--surface-2); font-family: var(--font-display); font-weight: 600; color: var(--ink); }
.prose tbody tr:hover { background: #fcfbf8; }
.prose blockquote {
  margin: 1.4em 0; padding: 4px 20px; border-left: 3px solid var(--maple);
  color: var(--muted); font-style: italic;
}

.callout {
  background: var(--surface-2); border: 1px solid var(--line-2);
  border-radius: var(--radius-sm); padding: 18px 20px; margin: 1.4em 0;
}
.callout.warn { background: #fdf6ec; border-color: #ecd9b4; }
.callout strong { color: var(--ink); }

.kicker-num {
  font-family: var(--font-display); font-weight: 700; color: var(--maple);
  font-size: .82rem; letter-spacing: .05em;
}

/* ---------- Footer ---------- */
.site-footer { background: var(--ink); color: #b6c1cd; padding: 56px 0 28px; margin-top: 40px; }
.site-footer a { color: #cdd7e1; text-decoration: none; }
.site-footer a:hover { color: #fff; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 30px; }
.footer-grid h4 { color: #fff; font-size: .8rem; text-transform: uppercase; letter-spacing: .12em; margin-bottom: 14px; }
.footer-grid ul { list-style: none; padding: 0; margin: 0; }
.footer-grid li { margin-bottom: 9px; font-size: .92rem; }
.footer-brand { display: flex; align-items: center; gap: 10px; font-family: var(--font-display); font-weight: 800; color: #fff; font-size: 1.1rem; margin-bottom: 12px; }
.footer-brand .leaf { width: 24px; height: 24px; }
.footer-note { font-size: .85rem; color: #8b97a4; max-width: 320px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1); margin-top: 36px; padding-top: 20px;
  display: flex; justify-content: space-between; gap: 14px; flex-wrap: wrap;
  font-size: .85rem; color: #8b97a4;
}
@media (max-width: 860px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 520px) { .footer-grid { grid-template-columns: 1fr; } }

/* ---------- Ad slots ---------- */
.ad-slot {
  margin: 30px auto; max-width: 728px;
  display: flex; align-items: center; justify-content: center;
}
/* An empty ad slot collapses to nothing — no blank box before a real ad loads. */
.ad-slot:empty { display: none; }
/* Hide the placeholder styling once real ads load */
.ad-slot ins { width: 100%; }

/* ---------- Misc ---------- */
.pill {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--surface-2); border: 1px solid var(--line-2);
  border-radius: 999px; padding: 5px 13px; font-size: .82rem; color: var(--muted);
  font-weight: 500;
}
.pill .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--pine); }

hr.rule { border: 0; border-top: 1px solid var(--line); margin: 40px 0; }

:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; border-radius: 4px; }

.breadcrumb { font-size: .85rem; color: var(--muted-2); padding: 18px 0 0; }
.breadcrumb a { color: var(--muted); text-decoration: none; }
.breadcrumb a:hover { color: var(--ink); }

.toc {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 18px 22px; margin: 0 0 30px;
}
.toc strong { font-family: var(--font-display); display: block; margin-bottom: 8px; font-size: .9rem; text-transform: uppercase; letter-spacing: .1em; color: var(--muted); }
.toc ol { margin: 0; padding-left: 1.1em; }
.toc li { margin-bottom: 5px; font-size: .95rem; }

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

/* --- supplementary utilities (cta band, inline disclaimer) --- */
.cta-band { background: var(--ink); color: #fff; border-radius: var(--radius); padding: 28px 30px; margin: 34px 0; text-align: center; }
.cta-band h3 { font-family: var(--font-display); margin: 0 0 6px; font-size: 1.25rem; color: #fff; }
.cta-band p { margin: 0 0 16px; color: #cdd6df; }
.cta-band .btn-primary { background: var(--maple); }
.cta-band .btn-primary:hover { background: #d65349; }
.disclaimer-inline { margin-top: 2.4em; padding-top: 1.2em; border-top: 1px solid var(--line); font-size: .85rem; color: var(--muted-2); }
.contact-card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; margin: 24px 0; box-shadow: var(--shadow); }
.contact-card a { color: var(--maple-dk); font-weight: 600; }

/* --- contact form --- */
.cform { display: grid; gap: 16px; margin-top: 8px; }
.cform label { display: block; font-weight: 600; font-size: .9rem; margin-bottom: 6px; color: var(--ink); font-family: var(--font-display); }
.cform input, .cform textarea {
  width: 100%; font-family: var(--font-body); font-size: 1rem; color: var(--text);
  padding: 12px 14px; border: 1px solid var(--line-2); border-radius: var(--radius-sm);
  background: var(--surface); -webkit-appearance: none; appearance: none;
}
.cform textarea { min-height: 140px; resize: vertical; }
.cform input:focus, .cform textarea:focus { border-color: var(--focus); outline: none; box-shadow: 0 0 0 3px rgba(47,109,240,.15); }
.cform .btn { justify-self: start; }
.cform-note { font-size: .85rem; color: var(--muted-2); margin: 4px 0 0; }

/* --- inline diagram figures --- */
.figure { margin: 28px 0 32px; }
.figure svg { width: 100%; height: auto; display: block; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.figure figcaption { margin-top: 10px; font-size: .85rem; color: var(--muted-2); text-align: center; }