/* ==========================================================================
   QuiltMath stylesheet
   Palette: 19th century quilt classics. Indigo and turkey red on muslin,
   with a cutting-mat green reserved for results cards (the signature).
   Type: Fraunces (display, used with restraint) + Atkinson Hyperlegible (body,
   designed for maximum legibility, chosen for our reader demographic).
   ========================================================================== */

:root {
  --indigo: #2B3A67;
  --indigo-dark: #1F2B4D;
  --indigo-tint: #E9ECF4;
  --red: #A63A3A;
  --red-tint: #F6ECEC;
  --muslin: #FBF9F4;
  --warm-white: #FFFFFF;
  --mat: #EDF2EA;          /* cutting mat surface */
  --mat-grid: #D8E2D3;     /* cutting mat grid lines */
  --mat-deep: #5B7058;     /* cutting mat label green */
  --border: #E5E1D8;
  --charcoal: #26261F;
  --charcoal-mid: #4A4A42;
  --charcoal-light: #6E6E64;
  --focus: #2B3A67;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: 'Atkinson Hyperlegible', system-ui, sans-serif;
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--charcoal);
  background: var(--muslin);
}

h1, h2, h3 {
  font-family: 'Fraunces', Georgia, serif;
  font-weight: 650;
  line-height: 1.2;
  color: var(--charcoal);
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(1.9rem, 4.5vw, 2.6rem); margin: 0 0 0.5rem; }
h2 { font-size: clamp(1.4rem, 3vw, 1.75rem); margin: 2.5rem 0 0.75rem; }
h3 { font-size: 1.2rem; margin: 1.75rem 0 0.5rem; }

p { margin: 0 0 1rem; }
a { color: var(--indigo); text-underline-offset: 2px; }
a:hover { color: var(--indigo-dark); }

/* Accessibility ---------------------------------------------------------- */
.skip-link {
  position: absolute;
  top: -100%;
  left: 0;
  background: var(--indigo);
  color: #fff;
  padding: 0.75rem 1.5rem;
  z-index: 1000;
  font-weight: 700;
}
.skip-link:focus { top: 0; }

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}
:focus:not(:focus-visible) { outline: none; }

/* Header / nav ----------------------------------------------------------- */
.site-header {
  background: var(--warm-white);
  border-bottom: 1px solid var(--border);
}
.main-nav {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0.85rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
}
.logo-text {
  font-family: 'Fraunces', Georgia, serif;
  font-weight: 650;
  font-size: 1.35rem;
  color: var(--charcoal);
}
.logo-accent { color: var(--red); }
.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-links a {
  text-decoration: none;
  font-weight: 700;
  color: var(--charcoal-mid);
  padding: 0.5rem 0.25rem;
  display: inline-block;
}
.nav-links a:hover { color: var(--indigo); }
.nav-cta {
  background: var(--indigo);
  color: #fff !important;
  border-radius: 50px;
  padding: 0.55rem 1.25rem !important;
}
.nav-cta:hover { background: var(--indigo-dark); }
.nav-toggle { display: none; }

/* Breadcrumb -------------------------------------------------------------- */
.breadcrumb { max-width: 1080px; margin: 0 auto; padding: 0.75rem 1.25rem 0; font-size: 0.9rem; }
.breadcrumb ol { list-style: none; display: flex; flex-wrap: wrap; gap: 0.35rem; margin: 0; padding: 0; }
.breadcrumb li + li::before { content: "/"; color: var(--charcoal-light); margin-right: 0.35rem; }

/* Page shell -------------------------------------------------------------- */
.page {
  max-width: 1080px;
  margin: 0 auto;
  padding: 2rem 1.25rem 3.5rem;
}
.page-narrow { max-width: 800px; }
.lede {
  font-size: 1.15rem;
  color: var(--charcoal-mid);
  max-width: 46rem;
}

/* Trust bar ---------------------------------------------------------------- */
.trust-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  margin: 1rem 0 1.5rem;
  padding: 0;
  list-style: none;
  font-size: 0.92rem;
  color: var(--charcoal-mid);
}
.trust-bar li::before { content: "✓ "; color: var(--mat-deep); font-weight: 700; }

/* Calculator card ----------------------------------------------------------- */
.calc-grid {
  display: grid;
  grid-template-columns: minmax(0, 420px) minmax(0, 1fr);
  gap: 1.5rem;
  align-items: start;
  margin: 1.5rem 0 1rem;
}
.calc-card {
  background: var(--warm-white);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 1.5rem;
}
.calc-card h2 { margin-top: 0; font-size: 1.25rem; }

.field { margin-bottom: 1.1rem; }
.field label {
  display: block;
  font-weight: 700;
  margin-bottom: 0.35rem;
}
.field .hint {
  display: block;
  font-size: 0.88rem;
  font-weight: 400;
  color: var(--charcoal-light);
  margin-top: 0.2rem;
}
.field input[type="number"],
.field select {
  width: 100%;
  min-height: 48px;
  padding: 0.6rem 0.75rem;
  font: inherit;
  color: var(--charcoal);
  background: var(--muslin);
  border: 1.5px solid var(--border);
  border-radius: 10px;
}
.field input:focus, .field select:focus { border-color: var(--indigo); }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 0.85rem; }

.field-error {
  display: none;
  color: var(--red);
  font-size: 0.9rem;
  font-weight: 700;
  margin-top: 0.3rem;
}
.field-error.show { display: block; }

.btn {
  display: inline-block;
  font: inherit;
  font-weight: 700;
  background: var(--indigo);
  color: #fff;
  border: none;
  border-radius: 50px;
  padding: 0.8rem 1.8rem;
  min-height: 48px;
  cursor: pointer;
}
.btn:hover { background: var(--indigo-dark); }

/* Results: the cutting mat card (signature element) -------------------------- */
.results-card {
  background: var(--mat);
  background-image:
    linear-gradient(var(--mat-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--mat-grid) 1px, transparent 1px);
  background-size: 28px 28px;
  border: 1px solid var(--mat-grid);
  border-radius: 20px;
  padding: 1.5rem;
  min-height: 200px;
}
.results-card[hidden] { display: none; }
.results-empty {
  background: var(--mat);
  background-image:
    linear-gradient(var(--mat-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--mat-grid) 1px, transparent 1px);
  background-size: 28px 28px;
  border: 1px dashed var(--mat-grid);
  border-radius: 20px;
  padding: 2rem 1.5rem;
  color: var(--mat-deep);
  font-weight: 700;
  text-align: center;
}
.results-eyebrow {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--mat-deep);
  margin: 0 0 0.25rem;
}
.results-headline {
  font-family: 'Fraunces', Georgia, serif;
  font-size: clamp(2rem, 5vw, 2.8rem);
  font-weight: 650;
  color: var(--charcoal);
  margin: 0 0 0.25rem;
  line-height: 1.1;
}
.results-sub { color: var(--charcoal-mid); margin-bottom: 1.1rem; }
.results-details {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 0.75rem;
  margin: 1rem 0;
  padding: 0;
  list-style: none;
}
.results-details li {
  background: rgba(255, 255, 255, 0.82);
  border-radius: 12px;
  padding: 0.7rem 0.9rem;
}
.results-details .label {
  display: block;
  font-size: 0.82rem;
  color: var(--charcoal-light);
}
.results-details .value { font-weight: 700; font-size: 1.05rem; }
.results-note {
  font-size: 0.95rem;
  color: var(--charcoal-mid);
  background: rgba(255, 255, 255, 0.82);
  border-left: 4px solid var(--mat-deep);
  border-radius: 0 12px 12px 0;
  padding: 0.75rem 1rem;
  margin-top: 1rem;
}
.cut-diagram { margin-top: 1.25rem; }
.cut-diagram svg { width: 100%; height: auto; display: block; }
.cut-diagram-caption { font-size: 0.88rem; color: var(--charcoal-mid); margin-top: 0.4rem; }

/* Content sections ------------------------------------------------------------ */
.content-section { max-width: 800px; }
table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0 1.5rem;
  background: var(--warm-white);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  font-size: 0.98rem;
}
th, td { text-align: left; padding: 0.6rem 0.85rem; border-bottom: 1px solid var(--border); }
th { background: var(--indigo-tint); font-weight: 700; }
tr:last-child td { border-bottom: none; }

ul.checklist { padding-left: 1.25rem; }

.sources {
  font-size: 0.92rem;
  color: var(--charcoal-mid);
  background: var(--warm-white);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem 1.25rem;
  margin: 1.5rem 0;
}
.sources h2 { margin-top: 0; font-size: 1.1rem; }

/* FAQ ---------------------------------------------------------------------- */
.faq-section { max-width: 800px; }
.faq-item {
  background: var(--warm-white);
  border: 1px solid var(--border);
  border-radius: 12px;
  margin-bottom: 0.75rem;
  overflow: hidden;
}
.faq-question {
  width: 100%;
  text-align: left;
  font: inherit;
  font-weight: 700;
  color: var(--charcoal);
  background: none;
  border: none;
  padding: 0.95rem 1.1rem;
  min-height: 48px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
}
.faq-question::after { content: "+"; color: var(--red); font-weight: 700; }
.faq-question[aria-expanded="true"]::after { content: "\2212"; }
.faq-answer { padding: 0 1.1rem 1rem; display: none; }
.faq-item.open .faq-answer { display: block; }

/* Related tools --------------------------------------------------------------- */
.related-tools {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin: 1rem 0 2rem;
}
.related-tools a {
  display: block;
  background: var(--warm-white);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.1rem 1.2rem;
  text-decoration: none;
  font-weight: 700;
  color: var(--charcoal);
}
.related-tools a:hover { border-color: var(--indigo); color: var(--indigo); }
.related-tools .tool-desc {
  display: block;
  font-weight: 400;
  font-size: 0.92rem;
  color: var(--charcoal-mid);
  margin-top: 0.25rem;
}

/* Hero (homepage) -------------------------------------------------------------- */
.hero { padding: 3rem 0 1rem; }
.hero .lede { font-size: 1.25rem; }
.hero-cta { margin-top: 1.5rem; }

/* Footer ------------------------------------------------------------------------ */
.site-footer {
  background: var(--indigo-dark);
  color: #E6E9F2;
  margin-top: 3rem;
}
.footer-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 2.25rem 1.25rem 1rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 2rem;
}
.site-footer .logo-text { color: #fff; }
.site-footer .logo-accent { color: #E8A0A0; }
.footer-tagline { color: #B9C0D6; font-size: 0.95rem; max-width: 28rem; }
.footer-nav ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.5rem; }
.footer-nav a { color: #E6E9F2; text-decoration: none; min-height: 24px; display: inline-block; padding: 0.15rem 0; }
.footer-nav a:hover { text-decoration: underline; }
.footer-legal {
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  max-width: 1080px;
  margin: 0 auto;
  padding: 1rem 1.25rem 1.5rem;
  font-size: 0.85rem;
  color: #B9C0D6;
}
.footer-legal a { color: #E6E9F2; }

/* Mobile ---------------------------------------------------------------------- */
@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    background: none;
    border: none;
    padding: 0.6rem;
    min-width: 48px;
    min-height: 48px;
    cursor: pointer;
  }
  .nav-toggle span {
    display: block;
    width: 24px;
    height: 2.5px;
    background: var(--charcoal);
    border-radius: 2px;
  }
  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--warm-white);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    align-items: stretch;
    padding: 0.75rem 1.25rem 1.25rem;
    gap: 0.5rem;
    z-index: 50;
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 0.7rem 0.25rem; }
  .site-header { position: relative; }
  .calc-grid { grid-template-columns: 1fr; }
  .field-row { grid-template-columns: 1fr; }
}