/* ============================================================
   Brightloop — placeholder marketing site
   Design tokens
   ============================================================ */
:root {
  /* Color */
  --color-canvas: #F3F4EF;
  --color-surface: #FFFFFF;
  --color-ink: #14171C;
  --color-ink-soft: #4B5157;
  --color-muted: #6E746C;
  --color-border: #DDE0D6;
  --color-primary: #1B5E4A;
  --color-primary-strong: #123F32;
  --color-primary-light: #2F8F6B;
  --color-accent: #D9A441;
  --color-accent-strong: #B9832C;
  --color-ink-reverse: #0E2420;
  --color-canvas-reverse: #0B1E1A;
  --color-on-reverse: #F4F1E6;
  --color-on-reverse-soft: #B9C4BC;

  /* Type */
  --font-display: "Newsreader", "Iowan Old Style", "Georgia", serif;
  --font-body: "Work Sans", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;

  /* Spacing */
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2rem;
  --space-5: 3rem;
  --space-6: 4.5rem;
  --space-7: 6.5rem;

  /* Layout */
  --container-w: 1180px;
  --radius-s: 8px;
  --radius-m: 14px;
  --shadow-card: 0 1px 2px rgba(20, 23, 28, 0.04), 0 12px 28px -16px rgba(20, 23, 28, 0.18);
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================================================
   Reset / base
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--color-canvas);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4, p { margin: 0; }
button { font: inherit; }

:focus-visible {
  outline: 2px solid var(--color-accent-strong);
  outline-offset: 3px;
}

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

.container {
  width: 100%;
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 1.75rem;
}

.eyebrow {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-primary);
}
.eyebrow--reverse { color: var(--color-accent); }

h1, h2, h3 { font-family: var(--font-display); font-weight: 500; color: var(--color-ink); letter-spacing: -0.01em; }
h1 { font-size: clamp(2.4rem, 4.4vw, 3.6rem); line-height: 1.08; }
h2 { font-size: clamp(1.7rem, 2.8vw, 2.35rem); line-height: 1.16; }
h3 { font-size: 1.2rem; line-height: 1.3; }
em { font-style: italic; color: var(--color-primary); }

.lede {
  font-size: 1.1rem;
  color: var(--color-ink-soft);
  max-width: 46ch;
}

/* ============================================================
   Buttons
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 1.4rem;
  border-radius: var(--radius-s);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s var(--ease), background-color 0.15s var(--ease), border-color 0.15s var(--ease), color 0.15s var(--ease);
  white-space: nowrap;
}
.btn--primary { background: var(--color-primary); color: #fff; }
.btn--primary:hover { background: var(--color-primary-strong); }
.btn--ghost { background: transparent; color: var(--color-ink); border-color: var(--color-border); }
.btn--ghost:hover { border-color: var(--color-ink); }
.btn--on-reverse { background: var(--color-accent); color: var(--color-ink-reverse); }
.btn--on-reverse:hover { background: #EAB65B; }
.btn:active { transform: translateY(1px); }

/* ============================================================
   Header / nav
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(243, 244, 239, 0.88);
  backdrop-filter: saturate(140%) blur(8px);
  border-bottom: 1px solid var(--color-border);
}
.nav {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding-top: 1.1rem;
  padding-bottom: 1.1rem;
  position: relative;
}
.nav__brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  margin-right: auto;
}
.nav__brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: var(--color-primary);
  color: #fff;
  font-family: var(--font-display);
  font-size: 1rem;
  flex: none;
}
.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  font-size: 0.95rem;
  font-weight: 500;
}
.nav__links a { padding: 0.3rem 0; border-bottom: 2px solid transparent; color: var(--color-ink-soft); }
.nav__links a:hover, .nav__links a[aria-current="page"] { color: var(--color-ink); border-color: var(--color-accent-strong); }
.nav-toggle { display: none; }
.nav-toggle-label {
  display: none;
  width: 34px;
  height: 34px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-s);
  cursor: pointer;
}
.nav-toggle-label span,
.nav-toggle-label span::before,
.nav-toggle-label span::after {
  content: "";
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-ink);
  position: relative;
  transition: transform 0.2s var(--ease);
}
.nav-toggle-label span::before { position: absolute; top: -6px; }
.nav-toggle-label span::after { position: absolute; top: 6px; }

@media (max-width: 860px) {
  .nav-toggle-label { display: inline-flex; }
  .nav__links {
    display: none;
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: 0.5rem 1.75rem 1.25rem;
  }
  .nav__links a { width: 100%; padding: 0.7rem 0; }
  .nav-toggle:checked ~ .nav__links { display: flex; }
  .nav__cta { display: none; }
}

/* ============================================================
   Hero + flow diagram signature
   ============================================================ */
.hero { padding: var(--space-6) 0 var(--space-5); }
.hero__content { max-width: 640px; }
.hero__content .eyebrow { margin-bottom: var(--space-2); }
.hero__content h1 { margin-bottom: var(--space-3); }
.hero__actions { display: flex; gap: 1rem; margin-top: var(--space-4); flex-wrap: wrap; }

.flow {
  margin-top: var(--space-6);
  padding: var(--space-4) 0 var(--space-1);
  border-top: 1px solid var(--color-border);
}
.flow__label { margin-bottom: var(--space-3); }
.flow__diagram { width: 100%; height: auto; }
.flow__node-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  fill: var(--color-ink-soft);
}
.flow__node-sub {
  font-family: var(--font-body);
  font-size: 0.75rem;
  fill: var(--color-muted);
}

/* ============================================================
   Sections
   ============================================================ */
.section { padding: var(--space-6) 0; }
.section--tight { padding: var(--space-5) 0; }
.section__head { max-width: 640px; margin-bottom: var(--space-5); }
.section__head .eyebrow { margin-bottom: var(--space-2); }
.section__head h2 { margin-bottom: var(--space-2); }

.page-header { padding: var(--space-6) 0 var(--space-4); border-bottom: 1px solid var(--color-border); }
.page-header .eyebrow { margin-bottom: var(--space-2); }
.page-header h1 { margin-bottom: var(--space-2); max-width: 760px; }

/* Feature grid */
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-3); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-3); }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-3); }
@media (max-width: 960px) { .grid-4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; } }

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-m);
  padding: var(--space-3);
  box-shadow: var(--shadow-card);
}
.feature-card__icon {
  width: 38px;
  height: 38px;
  margin-bottom: var(--space-2);
  color: var(--color-primary);
}
.feature-card h3 { margin-bottom: 0.5rem; }
.feature-card p { color: var(--color-ink-soft); font-size: 0.95rem; }

/* Steps (how it works) */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-4); }
@media (max-width: 720px) { .steps { grid-template-columns: 1fr; } }
.step { position: relative; padding-top: var(--space-3); border-top: 2px solid var(--color-primary); }
.step__number { font-family: var(--font-mono); color: var(--color-accent-strong); font-size: 0.85rem; display: block; margin-bottom: 0.75rem; }
.step h3 { margin-bottom: 0.4rem; }
.step p { color: var(--color-ink-soft); font-size: 0.95rem; }

/* Testimonial */
.testimonial { max-width: 720px; margin: 0 auto; text-align: center; }
.testimonial__quote {
  font-family: var(--font-display);
  font-style: italic;
  font-size: clamp(1.4rem, 2.6vw, 1.9rem);
  color: var(--color-ink);
  margin-bottom: var(--space-3);
}
.testimonial__attribution {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-muted);
}

/* CTA band */
.cta-band {
  background: var(--color-canvas-reverse);
  color: var(--color-on-reverse);
  border-radius: var(--radius-m);
  padding: var(--space-5);
  text-align: center;
}
.cta-band h2 { color: var(--color-on-reverse); margin-bottom: var(--space-3); }
.cta-band__inner { max-width: 560px; margin: 0 auto; }

/* Values / team */
.value-card h3 { margin-bottom: 0.4rem; }
.value-card p { color: var(--color-ink-soft); font-size: 0.95rem; }

.team-card { display: flex; gap: 1rem; align-items: flex-start; }
.avatar {
  flex: none;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 1.05rem;
}
.team-card h3 { margin-bottom: 0.15rem; font-size: 1.05rem; }
.team-card .role { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.04em; text-transform: uppercase; color: var(--color-primary); display: block; margin-bottom: 0.5rem; }
.team-card p.bio { color: var(--color-ink-soft); font-size: 0.92rem; }

/* Pricing */
.pricing-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-3); align-items: stretch; }
@media (max-width: 860px) { .pricing-grid { grid-template-columns: 1fr; } }
.price-card { display: flex; flex-direction: column; }
.price-card--featured { border-color: var(--color-accent-strong); box-shadow: 0 1px 2px rgba(20,23,28,0.04), 0 18px 34px -18px rgba(185, 131, 44, 0.45); }
.price-card__badge {
  align-self: flex-start;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  background: var(--color-accent);
  color: var(--color-ink-reverse);
  padding: 0.25rem 0.55rem;
  border-radius: 999px;
  margin-bottom: var(--space-2);
}
.price-card h3 { font-family: var(--font-body); font-weight: 600; font-size: 1.05rem; }
.price__amount { font-family: var(--font-mono); font-size: 2.4rem; color: var(--color-ink); margin: 0.6rem 0 0.1rem; }
.price__period { color: var(--color-muted); font-size: 0.85rem; margin-bottom: var(--space-3); }
.price__features { margin: 0 0 var(--space-3); display: flex; flex-direction: column; gap: 0.55rem; font-size: 0.92rem; color: var(--color-ink-soft); }
.price__features li { display: flex; gap: 0.5rem; align-items: baseline; }
.price__features li::before { content: "—"; color: var(--color-accent-strong); flex: none; }
.price-card .btn { margin-top: auto; justify-content: center; }

/* FAQ */
.faq { max-width: 760px; }
.faq-item { border-bottom: 1px solid var(--color-border); padding: var(--space-3) 0; }
.faq-item h3 { font-family: var(--font-body); font-weight: 600; font-size: 1.02rem; margin-bottom: 0.5rem; }
.faq-item p { color: var(--color-ink-soft); font-size: 0.95rem; }

/* Contact */
.contact-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: var(--space-4); }
@media (max-width: 780px) { .contact-grid { grid-template-columns: 1fr; } }
.contact-card .eyebrow { margin-bottom: var(--space-2); }
.contact-card h3 { margin: var(--space-3) 0 0.3rem; font-size: 1rem; }
.contact-card a.email { font-family: var(--font-mono); color: var(--color-primary); }
.contact-card p.muted { color: var(--color-muted); font-size: 0.9rem; }

/* Footer */
.site-footer { background: var(--color-ink-reverse); color: var(--color-on-reverse-soft); margin-top: var(--space-6); }
.footer__grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: var(--space-4); padding: var(--space-5) 0 var(--space-4); }
@media (max-width: 720px) { .footer__grid { grid-template-columns: 1fr; gap: var(--space-3); } }
.footer__brand { display: flex; gap: 0.75rem; }
.footer__brand p { font-size: 0.9rem; max-width: 32ch; }
.footer__links { display: flex; flex-direction: column; gap: 0.6rem; font-size: 0.92rem; }
.footer__links a:hover { color: var(--color-on-reverse); }
.footer__contact { font-size: 0.92rem; }
.footer__contact .eyebrow { color: var(--color-accent); margin-bottom: 0.5rem; }
.footer__contact a { display: block; margin-bottom: 0.5rem; }
.footer__bottom { border-top: 1px solid rgba(244,241,230,0.12); padding: 1.25rem 0; font-size: 0.82rem; }

/* ============================================================
   404
   ============================================================ */
.error-page { padding: var(--space-7) 0; text-align: center; }
.error-page h1 { font-size: clamp(3rem, 8vw, 5rem); margin-bottom: var(--space-2); }
.error-page p { color: var(--color-ink-soft); margin: 0 auto var(--space-4); max-width: 44ch; }

/* ============================================================
   Section variants + interior-page components
   ============================================================ */
.section--surface {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}
.cta-band .eyebrow { margin-bottom: var(--space-2); }

/* Feature detail rows (features.html) */
.feature-row {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: var(--space-4);
  padding: var(--space-4) 0;
  border-top: 1px solid var(--color-border);
}
.feature-row:first-of-type { border-top: none; padding-top: 0; }
@media (max-width: 720px) { .feature-row { grid-template-columns: 1fr; } }
.feature-row__icon { width: 40px; height: 40px; color: var(--color-primary); margin-bottom: 0.75rem; }
.feature-row h3 { margin-bottom: 0; }
.feature-row > div:last-child > p { color: var(--color-ink-soft); }
.feature-row ul { display: flex; flex-direction: column; gap: 0.5rem; margin-top: 0.9rem; }
.feature-row ul li { font-size: 0.92rem; color: var(--color-ink-soft); display: flex; gap: 0.5rem; }
.feature-row ul li::before { content: "—"; color: var(--color-accent-strong); flex: none; }

/* Contact page refinements */
.contact-card a.email {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.25rem;
  color: var(--color-primary);
  margin: 0.5rem 0 1rem;
}
.contact-card .btn { margin: 0.25rem 0 var(--space-3); }