/* ============================================================
   BarSignal landing page — styles.css
   Tokens per Build Brief §5.1. Inter (+ JetBrains Mono for eyebrows).
   Dark canvas. Teal is brand only; semantic colors appear only in
   the eight-category strip (#how .catstrip).
   ============================================================ */

:root {
  /* Surfaces */
  --bs-canvas:        #0e1116;
  --bs-surface:       #151a21;
  --bs-surface-2:     #1c222b;
  --bs-border:        #2a313b;
  --bs-border-strong: #3a414c;

  /* Brand */
  --bs-brand:         #2fd1c5;
  --bs-brand-hover:   #29bbb0;
  --bs-brand-press:   #239e95;
  --bs-on-brand:      #0e1116;

  /* Semantic — ONLY the category strip */
  --bs-critical:      #ef4444;
  --bs-warning:       #f5a524;
  --bs-info:          #4c8dff;

  /* Text */
  --bs-text:          #e6eaf0;
  --bs-text-muted:    #9aa3af;
  --bs-text-faint:    #6b7280;

  /* Radius */
  --bs-radius-sm: 6px;
  --bs-radius-md: 10px;
  --bs-radius-lg: 14px;
  --bs-radius-pill: 999px;

  /* Type scale (six steps — do not add a seventh) */
  --fs-xs:   12px;  --lh-xs:   16px;
  --fs-sm:   13px;  --lh-sm:   18px;
  --fs-base: 15px;  --lh-base: 22px;
  --fs-lg:   17px;  --lh-lg:   24px;
  --fs-xl:   22px;  --lh-xl:   28px;
  --fs-2xl:  28px;  --lh-2xl:  34px;

  --mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
  --sans: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
}

/* ----------------------------- Reset ----------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bs-canvas);
  color: var(--bs-text);
  font-family: var(--sans);
  font-size: var(--fs-base);
  line-height: var(--lh-base);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; display: block; }
ul { list-style: none; margin: 0; padding: 0; }
a { color: inherit; }

/* Visible keyboard focus */
a:focus-visible, button:focus-visible, .btn:focus-visible {
  outline: 2px solid var(--bs-brand);
  outline-offset: 3px;
  border-radius: var(--bs-radius-sm);
}

/* --------------------------- Layout ------------------------------ */
.container {
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}
.container--narrow { max-width: 760px; }

.section { padding: 64px 0; }
@media (min-width: 768px) { .section { padding: 96px 0; } }

/* --------------------------- Typography -------------------------- */
.eyebrow {
  font-family: var(--mono);
  font-size: var(--fs-sm);
  line-height: var(--lh-sm);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--bs-brand);
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 16px;
}
.eyebrow__rule {
  display: inline-block;
  width: 24px;
  height: 2px;
  background: var(--bs-brand);
  border-radius: 2px;
}

.section__h2 {
  font-size: var(--fs-2xl);
  line-height: var(--lh-2xl);
  font-weight: 800;
  letter-spacing: -0.01em;
  margin: 0 0 16px;
  color: var(--bs-text);
}
.section__body, .section__intro {
  font-size: var(--fs-lg);
  line-height: var(--lh-lg);
  color: var(--bs-text-muted);
  max-width: 64ch;
  margin: 0 0 32px;
}
.section__intro { margin-bottom: 40px; }

.accent { color: var(--bs-brand); }

.fineprint {
  font-size: var(--fs-xs);
  line-height: var(--lh-xs);
  color: var(--bs-text-faint);
  margin: 24px 0 0;
}
.fineprint a { color: var(--bs-text-muted); text-decoration: underline; }

/* ----------------------------- Buttons --------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 24px;
  border-radius: var(--bs-radius-md);
  font-weight: 700;
  font-size: var(--fs-base);
  text-decoration: none;
  border: 0;
  cursor: pointer;
  transition: background-color 120ms ease;
}
.btn--primary { background: var(--bs-brand); color: var(--bs-on-brand); }
.btn--primary:hover { background: var(--bs-brand-hover); }
.btn--primary:active { background: var(--bs-brand-press); }

.link-secondary {
  color: var(--bs-text-muted);
  text-decoration: none;
  font-weight: 600;
  font-size: var(--fs-base);
  display: inline-flex;
  align-items: center;
  min-height: 48px;
}
.link-secondary:hover { color: var(--bs-text); }

.pill {
  display: inline-block;
  font-size: var(--fs-sm);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--bs-brand);
  border: 1px solid var(--bs-brand);
  border-radius: var(--bs-radius-pill);
  padding: 6px 14px;
  background: transparent;
}

/* ------------------------------ Nav ------------------------------ */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(14, 17, 22, 0.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--bs-border);
}
.nav__inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.nav__logo img { height: 52px; width: auto; }
.nav__cta { min-height: 48px; padding: 0 18px; }

/* ------------------------------ Hero ----------------------------- */
.hero { padding: 72px 0 56px; }
@media (min-width: 768px) { .hero { padding: 112px 0 88px; } }
.hero__inner { max-width: 760px; }
.hero__h1 {
  font-size: clamp(28px, 6vw, 52px);
  line-height: 1.05;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 20px;
  color: var(--bs-text);
}
.hero__sub {
  font-size: var(--fs-lg);
  line-height: var(--lh-lg);
  color: var(--bs-text-muted);
  margin: 0 0 24px;
  max-width: 60ch;
}
.hero__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 20px;
  margin-top: 28px;
}

/* --------------------------- Problem list ------------------------ */
.problem-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  max-width: 640px;
}
@media (min-width: 640px) { .problem-list { grid-template-columns: 1fr 1fr; } }
.problem-list li {
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--bs-surface);
  border: 1px solid var(--bs-border);
  border-radius: var(--bs-radius-md);
  padding: 16px 18px;
  font-size: var(--fs-base);
  min-height: 56px;
}
.problem-list__icon {
  display: inline-flex;
  color: var(--bs-text-muted);
  flex-shrink: 0;
}

/* ------------------------- What / callout ------------------------ */
.callout {
  background: var(--bs-surface);
  border: 1px solid var(--bs-brand);
  border-left-width: 3px;
  border-radius: var(--bs-radius-md);
  padding: 20px 24px;
  color: var(--bs-text);
  font-size: var(--fs-lg);
  line-height: var(--lh-lg);
  margin: 0 0 28px;
  max-width: 64ch;
}
.callout--pilot {
  font-size: var(--fs-base);
  font-weight: 600;
  margin-bottom: 24px;
}

.isnot-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
}
.isnot-list li {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--bs-text-muted);
  font-size: var(--fs-base);
}
.isnot-list__x { display: inline-flex; color: var(--bs-text-faint); }

/* ------------------------------ Cards ---------------------------- */
.grid { display: grid; gap: 20px; }
.grid--3 { grid-template-columns: 1fr; }
.grid--2 { grid-template-columns: 1fr; }
@media (min-width: 640px) { .grid--protection { grid-template-columns: 1fr 1fr; } }
@media (min-width: 768px) {
  .grid--3 { grid-template-columns: repeat(3, 1fr); }
  .grid--2 { grid-template-columns: 1fr 1fr; }
}

.card {
  background: var(--bs-surface);
  border: 1px solid var(--bs-border);
  border-radius: var(--bs-radius-lg);
  padding: 26px;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.25);
}
.card__icon, .step-card__icon {
  display: inline-flex;
  color: var(--bs-brand);
  margin-bottom: 16px;
}
.card__title {
  font-size: var(--fs-xl);
  line-height: var(--lh-xl);
  font-weight: 700;
  margin: 0 0 8px;
  color: var(--bs-text);
}
.card__body {
  font-size: var(--fs-base);
  line-height: var(--lh-base);
  color: var(--bs-text-muted);
  margin: 0;
}
.step-card__kicker {
  font-family: var(--mono);
  font-size: var(--fs-sm);
  letter-spacing: 0.1em;
  color: var(--bs-text);
  font-weight: 500;
  margin: 0 0 8px;
}

/* ------------------------- Category strip ------------------------ */
.catstrip {
  margin-top: 48px;
  padding-top: 40px;
  border-top: 1px solid var(--bs-border);
}
.catstrip__heading {
  font-family: var(--mono);
  font-size: var(--fs-sm);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--bs-text);
  margin: 0 0 6px;
}
.catstrip__caption {
  font-size: var(--fs-base);
  color: var(--bs-text-muted);
  margin: 0 0 24px;
}
.catstrip__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}
@media (min-width: 560px) { .catstrip__grid { grid-template-columns: 1fr 1fr; } }
@media (min-width: 880px) { .catstrip__grid { grid-template-columns: 1fr 1fr 1fr 1fr; } }
.cat {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--bs-surface);
  border: 1px solid var(--bs-border);
  border-radius: var(--bs-radius-md);
  padding: 12px 14px;
  font-size: var(--fs-base);
  color: var(--bs-text);
  min-height: 48px;
}
.cat svg { flex-shrink: 0; }
.cat--critical svg { color: var(--bs-critical); }
.cat--warning  svg { color: var(--bs-warning); }
.cat--info     svg { color: var(--bs-info); }

/* ------------------------------ Offer ---------------------------- */
.highlight {
  background: var(--bs-surface);
  border: 1px solid var(--bs-brand);
  border-radius: var(--bs-radius-lg);
  padding: 24px 28px;
  margin: 0 0 32px;
}
.highlight__label {
  font-family: var(--mono);
  font-size: var(--fs-sm);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--bs-brand);
  margin: 0 0 8px;
}
.highlight__body {
  font-size: var(--fs-lg);
  line-height: var(--lh-lg);
  color: var(--bs-text);
  margin: 0;
}
.offer-col__heading {
  font-family: var(--mono);
  font-size: var(--fs-sm);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--bs-text);
  margin: 0 0 16px;
}
.check-list { display: grid; gap: 14px; }
.check-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: var(--fs-base);
  line-height: var(--lh-base);
  color: var(--bs-text);
}
.check-list svg { color: var(--bs-brand); flex-shrink: 0; margin-top: 2px; }
.offer-cols .offer-col + .offer-col { margin-top: 0; }

/* --------------------------- Form panel -------------------------- */
.form-panel {
  background: var(--bs-surface);
  border: 1px solid var(--bs-border);
  border-radius: var(--bs-radius-lg);
  padding: 16px;
}
.form-panel iframe { width: 100%; border: 0; display: block; }
.form-placeholder {
  border: 1px dashed var(--bs-border-strong);
  border-radius: var(--bs-radius-md);
  background: var(--bs-surface-2);
  padding: 56px 24px;
  text-align: center;
  color: var(--bs-text-muted);
}
.form-placeholder__mark { display: inline-flex; color: var(--bs-text-faint); margin-bottom: 12px; }
.form-placeholder__title { font-size: var(--fs-lg); font-weight: 700; color: var(--bs-text); margin: 0 0 6px; }
.form-placeholder__sub { font-size: var(--fs-sm); line-height: var(--lh-sm); color: var(--bs-text-faint); margin: 0 auto; max-width: 42ch; }

/* ----------------------------- Footer ---------------------------- */
.footer {
  border-top: 1px solid var(--bs-border);
  padding: 48px 0 56px;
  background: var(--bs-canvas);
}
.footer__inner { display: grid; gap: 20px; }
.footer__logo { height: 64px; width: auto; margin-bottom: 12px; }
.footer__tagline { color: var(--bs-text-muted); font-size: var(--fs-base); margin: 0; }
.footer__contact { font-size: var(--fs-base); color: var(--bs-text-muted); }
.footer__contact p { margin: 2px 0; }
.footer__contact a { color: var(--bs-brand); text-decoration: none; }
.footer__contact a:hover { text-decoration: underline; }
.footer__disclaimer {
  font-size: var(--fs-xs);
  line-height: 16px;
  color: var(--bs-text-faint);
  max-width: 72ch;
  margin: 0;
}
.footer__legal { display: flex; align-items: center; gap: 10px; font-size: var(--fs-sm); }
.footer__legal a { color: var(--bs-text-muted); text-decoration: none; }
.footer__legal a:hover { color: var(--bs-text); text-decoration: underline; }
.footer__legal span { color: var(--bs-text-faint); }
.footer__copy { font-size: var(--fs-xs); color: var(--bs-text-faint); margin: 0; }
.footer__credit {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 8px;
  padding-top: 20px;
  border-top: 1px solid var(--bs-border);
}
.footer__credit img {
  height: 56px;
  width: auto;
  flex-shrink: 0;
}
.footer__credit p {
  font-size: var(--fs-sm);
  line-height: var(--lh-sm);
  color: var(--bs-text-muted);
  margin: 0;
}

/* --------------------------- Legal pages ------------------------- */
.legal { padding: 56px 0 72px; }
.legal__back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--bs-brand);
  text-decoration: none;
  font-size: var(--fs-sm);
  font-weight: 600;
  margin-bottom: 28px;
}
.legal__back:hover { text-decoration: underline; }
.legal h1 {
  font-size: var(--fs-2xl);
  line-height: var(--lh-2xl);
  font-weight: 800;
  margin: 0 0 8px;
  letter-spacing: -0.01em;
}
.legal__meta { font-size: var(--fs-sm); color: var(--bs-text-faint); margin: 0 0 28px; }
.legal__draft {
  border: 1px solid var(--bs-border-strong);
  border-left: 3px solid var(--bs-warning);
  background: var(--bs-surface);
  border-radius: var(--bs-radius-md);
  padding: 16px 18px;
  font-size: var(--fs-sm);
  line-height: var(--lh-sm);
  color: var(--bs-text-muted);
  margin: 0 0 32px;
}
.legal h2 {
  font-size: var(--fs-xl);
  line-height: var(--lh-xl);
  font-weight: 700;
  margin: 32px 0 10px;
  color: var(--bs-text);
}
.legal p, .legal li {
  font-size: var(--fs-base);
  line-height: 1.6;
  color: var(--bs-text-muted);
}
.legal ul { list-style: disc; padding-left: 22px; margin: 0 0 12px; }
.legal li { margin-bottom: 6px; }
.legal a { color: var(--bs-brand); }

/* --------------------- Scroll-reveal animation ------------------- */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity 500ms ease, transform 500ms ease; }
.reveal.is-visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
}