/* PCOcalc marketing site - shared styles.
   Design tokens pulled directly from lib/theme/app_colors.dart / DESIGN.md -
   cool brushed-aluminum base, petrol-teal accent, instrument-panel/gauge-face
   restraint. Self-hosted fonts (no Google Fonts dependency), full light/dark
   via prefers-color-scheme. */

@font-face {
  font-family: "Space Grotesk";
  src: url("../fonts/SpaceGrotesk-Variable.ttf") format("truetype-variations");
  font-weight: 600 700;
  font-display: swap;
}
@font-face {
  font-family: "IBM Plex Sans";
  src: url("../fonts/IBMPlexSans-Variable.ttf") format("truetype-variations");
  font-weight: 400 600;
  font-display: swap;
}
@font-face {
  font-family: "IBM Plex Mono";
  src: url("../fonts/IBMPlexMono-Regular.ttf") format("truetype");
  font-weight: 400;
  font-display: swap;
}
@font-face {
  font-family: "IBM Plex Mono";
  src: url("../fonts/IBMPlexMono-SemiBold.ttf") format("truetype");
  font-weight: 600;
  font-display: swap;
}
@font-face {
  font-family: "IBM Plex Mono";
  src: url("../fonts/IBMPlexMono-Bold.ttf") format("truetype");
  font-weight: 700;
  font-display: swap;
}

:root {
  --bg: #EEF1F1;
  --surface: #FFFFFF;
  --surface-elevated: #F7F9F9;
  --primary: #1B5E63;
  --on-primary: #F2FAFA;
  --text-primary: #14201F;
  --text-secondary: #5B6A69;
  --border: #D7DEDD;
  --success: #3C7A4E;
  --error: #B23A2E;
  --hazard: #B8790A;
  --shadow: 0 1px 2px rgba(20, 32, 31, 0.06), 0 8px 24px rgba(20, 32, 31, 0.07);

  --font-heading: "Space Grotesk", ui-sans-serif, system-ui, sans-serif;
  --font-body: "IBM Plex Sans", ui-sans-serif, system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;

  --max-width: 1120px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #101515;
    --surface: #181F1F;
    --surface-elevated: #202929;
    --primary: #4FB8B8;
    --on-primary: #052024;
    --text-primary: #EAF2F1;
    --text-secondary: #A8B7B5;
    --border: #2C3535;
    --hazard: #E2AC4E;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.35), 0 10px 28px rgba(0, 0, 0, 0.4);
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--text-primary);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img, svg { max-width: 100%; display: block; }
a { color: var(--primary); }

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  margin: 0 0 0.5em;
  letter-spacing: -0.01em;
}
h1 { font-size: clamp(2rem, 4.4vw, 3rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); }
h3 { font-size: 1.25rem; }
p { margin: 0 0 1em; color: var(--text-primary); }
.lede { color: var(--text-secondary); font-size: 1.1rem; max-width: 60ch; }

.mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }

.wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section { padding: 4rem 0; }
.section-tight { padding: 2.5rem 0; }
.section-alt { background: var(--surface); }

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

/* ---------- Header / nav ---------- */

header.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}
.nav-bar {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0.9rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text-primary);
  text-decoration: none;
}
.brand-mark {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: var(--primary);
  color: var(--on-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.95rem;
}
nav.site-nav {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}
nav.site-nav a {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
}
nav.site-nav a:hover, nav.site-nav a[aria-current="page"] { color: var(--text-primary); }
.nav-cta {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.4rem 0.6rem;
  color: var(--text-primary);
  font-size: 1.1rem;
}

@media (max-width: 860px) {
  nav.site-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 0.5rem 1.5rem 1rem;
  }
  nav.site-nav.open { display: flex; }
  nav.site-nav a { padding: 0.6rem 0; width: 100%; }
  .nav-toggle { display: inline-flex; }
  .nav-cta .btn-secondary { display: none; }
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.75rem 1.4rem;
  border-radius: 999px;
  border: 1px solid transparent;
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
}
.btn-primary { background: var(--primary); color: var(--on-primary); }
.btn-primary:hover { opacity: 0.92; }
.btn-secondary { background: transparent; color: var(--text-primary); border-color: var(--border); }
.btn-secondary:hover { border-color: var(--primary); color: var(--primary); }
.btn-lg { padding: 0.9rem 1.8rem; font-size: 1.02rem; }
.btn-block { width: 100%; }

/* ---------- Hero ---------- */

.hero {
  padding: 3.5rem 0 3rem;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 2.5rem;
  align-items: center;
}
@media (max-width: 860px) {
  .hero-grid { grid-template-columns: 1fr; }
}
.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--primary);
  font-weight: 600;
  margin-bottom: 0.6rem;
  display: block;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 0.85rem; margin: 1.6rem 0; }
.badge-row { display: flex; flex-wrap: wrap; gap: 0.75rem; align-items: center; }
.store-badge { height: 44px; width: auto; }
.trust-line { font-size: 0.88rem; color: var(--text-secondary); margin-top: 0.75rem; }

/* Instrument-readout style device mock for the hero, built from a real
   calculator layout - never fake app chrome, just a stylized frame around
   real copy so it reads as "this is the app's own math," not a mockup. */
.readout-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 1.6rem;
  max-width: 380px;
  margin: 0 auto;
}
.readout-mode {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 0.9rem;
}
.readout-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.75rem;
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--border);
}
.readout-row .k { flex-shrink: 1; }
.readout-row .v { flex-shrink: 0; }
.readout-row:last-of-type { border-bottom: none; }
.readout-row .k { color: var(--text-secondary); font-size: 0.92rem; }
.readout-row .v { font-family: var(--font-mono); font-weight: 600; }
.readout-result {
  margin-top: 1rem;
  padding: 1rem;
  border-radius: var(--radius-md);
  background: var(--surface-elevated);
  text-align: center;
}
.readout-result .label { font-size: 0.78rem; color: var(--text-secondary); margin-bottom: 0.3rem; }
.readout-result .value {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary);
}

/* ---------- Feature grid / cards ---------- */

.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}
@media (max-width: 860px) { .grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .grid { grid-template-columns: 1fr; } }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 700px) { .grid-2 { grid-template-columns: 1fr; } }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow);
}
.card h3 { margin-bottom: 0.4rem; }
.card p { color: var(--text-secondary); margin-bottom: 0; font-size: 0.95rem; }
.icon-chip {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--primary) 14%, transparent);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 0.9rem;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.68rem;
  letter-spacing: 0.02em;
}

/* ---------- Section head ---------- */

.section-head { max-width: 62ch; margin: 0 auto 2.5rem; text-align: center; }
.section-head.left { margin: 0 0 2.5rem; text-align: left; }

/* ---------- Pricing ---------- */

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}
@media (max-width: 860px) { .pricing-grid { grid-template-columns: 1fr; } }
.price-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow);
  text-align: center;
}
.price-card .tier-name { font-family: var(--font-heading); font-weight: 700; font-size: 1.15rem; }
.price-card .amount {
  font-family: var(--font-mono);
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--primary);
  margin: 0.5rem 0 0.1rem;
}
.price-card .period { color: var(--text-secondary); font-size: 0.88rem; }
.price-card ul { list-style: none; padding: 0; margin: 1.25rem 0; text-align: left; }
.price-card li { padding: 0.35rem 0; font-size: 0.92rem; color: var(--text-secondary); display: flex; gap: 0.5rem; }
.price-card li::before { content: "✓"; color: var(--success); font-weight: 700; }

.tier-compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}
@media (max-width: 760px) { .tier-compare { grid-template-columns: 1fr; } }
.tier-compare .card { display: flex; flex-direction: column; }

table.worked-examples {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  background: var(--surface);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow);
}
table.worked-examples th, table.worked-examples td {
  padding: 0.85rem 1.2rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
  font-size: 0.95rem;
}
table.worked-examples th {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-secondary);
  background: var(--surface-elevated);
}
table.worked-examples td.mono { font-weight: 600; }
table.worked-examples tr:last-child td { border-bottom: none; }

.note-box {
  background: var(--surface-elevated);
  border: 1px solid var(--border);
  border-left: 3px solid var(--primary);
  border-radius: var(--radius-sm);
  padding: 1rem 1.2rem;
  font-size: 0.92rem;
  color: var(--text-secondary);
}
.note-box.hazard { border-left-color: var(--hazard); }
.note-box strong { color: var(--text-primary); }

/* ---------- FAQ accordion ---------- */

.faq-item {
  border-bottom: 1px solid var(--border);
}
.faq-item summary {
  cursor: pointer;
  padding: 1.1rem 0;
  font-weight: 600;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; font-size: 1.3rem; color: var(--text-secondary); }
.faq-item[open] summary::after { content: "\2212"; }
.faq-item p { padding-bottom: 1.1rem; color: var(--text-secondary); }

/* ---------- CTA band ---------- */

.cta-band {
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 3.5rem 0;
  text-align: center;
}
.cta-band h2 { margin-bottom: 0.5rem; }

/* ---------- Footer ---------- */

footer.site-footer {
  padding: 3rem 0 2.5rem;
  border-top: 1px solid var(--border);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: 2rem;
}
@media (max-width: 760px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
.footer-col h4 {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
}
.footer-col a {
  display: block;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.92rem;
  padding: 0.25rem 0;
}
.footer-col a:hover { color: var(--text-primary); }
.footer-bottom {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--text-secondary);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* ---------- Legal pages ---------- */

.legal-content { max-width: 74ch; }
.legal-content h2 { margin-top: 2.2rem; }
.legal-content ul { color: var(--text-secondary); }
.legal-content li { margin-bottom: 0.4rem; }
.updated-date { color: var(--text-secondary); font-size: 0.9rem; margin-bottom: 2rem; }

:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }