/* =========================================================
   SciFlow brand — marketing surface styles.
   Companion to system.css. Loaded on marketing/landing pages;
   not needed for document chrome or report shells.
   ========================================================= */

@import url('./tokens.css');

/* ---------------- Layout primitives ---------------- */
.container {
  max-width: var(--sf-container);
  margin: 0 auto;
  padding: 0 var(--sf-space-8);
}
.container--narrow {
  max-width: var(--sf-container-narrow);
}

/* ---------------- Typography utilities ---------------- */
.sf-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--sf-space-2);
  font-size: var(--sf-text-xs);
  text-transform: uppercase;
  letter-spacing: var(--sf-tracking-caps);
  font-weight: var(--sf-weight-semibold);
  color: var(--sf-ochre-700);
}
.sf-eyebrow--pill {
  padding: 6px 10px 6px 8px;
  background: var(--sf-ochre-50);
  border: 1px solid var(--sf-ochre-200);
  border-radius: var(--sf-radius-pill);
}
.sf-eyebrow--pill::before {
  content: '';
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--sf-ochre-500);
}
.sf-display {
  font-family: var(--sf-font-display);
  font-size: var(--sf-text-4xl);
  line-height: 1.02;
  letter-spacing: -0.035em;
  font-weight: var(--sf-weight-semibold);
  color: var(--sf-blue-900);
  text-wrap: balance;
}
.sf-lede {
  font-size: var(--sf-text-md);
  line-height: var(--sf-leading-normal);
  color: var(--sf-ink-700);
  max-width: 52ch;
}

/* ---------------- Site banner (announcement strip) ---------------- */
.site-banner {
  background: var(--sf-blue-900);
  color: rgba(255, 255, 255, 0.85);
  font-size: var(--sf-text-xs);
  padding: 8px var(--sf-space-6);
  text-align: center;
  letter-spacing: 0.01em;
}
.site-banner a { color: #fff; text-decoration: underline; text-underline-offset: 3px; }
.site-banner strong { color: #fff; margin-right: 4px; }

/* ---------------- Site nav ---------------- */
.site-nav {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: var(--sf-space-6);
  height: 72px;
  padding: 0 var(--sf-space-8);
}
.site-nav__brand img { height: 34px; }
.site-nav__links {
  display: flex;
  gap: var(--sf-space-1);
  flex: 1;
  margin-left: var(--sf-space-8);
}
.site-nav__link {
  padding: 8px 12px;
  border-radius: var(--sf-radius-sm);
  font-size: var(--sf-text-sm);
  color: var(--sf-ink-800);
  text-decoration: none;
  font-weight: var(--sf-weight-medium);
}
.site-nav__link:hover {
  background: var(--sf-ink-50);
  text-decoration: none;
}
/* Mobile menu toggle — hidden on desktop; a CSS-only hamburger on small
   screens (see the max-width: 900px block). The checkbox stays in the tab
   order (not display:none) so it is keyboard-toggleable. */
.site-nav__toggle {
  position: absolute;
  width: 1px; height: 1px;
  opacity: 0;
  margin: 0;
}
.site-nav__burger { display: none; }

/* ---------------- Hero ---------------- */
.hero {
  position: relative;
  overflow: hidden;
  padding: var(--sf-space-24) 0 var(--sf-space-20);
  background:
    radial-gradient(1000px 500px at 80% -10%, var(--sf-blue-100), transparent 60%),
    linear-gradient(180deg, var(--sf-blue-50) 0%, var(--sf-paper) 70%);
}
.hero__grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--sf-ink-100) 1px, transparent 1px),
    linear-gradient(90deg, var(--sf-ink-100) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: 0.5;
  mask-image: radial-gradient(ellipse at top right, black 30%, transparent 70%);
}
.hero__inner {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sf-space-16);
  align-items: center;
}
.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--sf-space-2);
  font-size: var(--sf-text-xs);
  text-transform: uppercase;
  letter-spacing: var(--sf-tracking-caps);
  font-weight: var(--sf-weight-semibold);
  color: var(--sf-ochre-700);
  padding: 6px 10px 6px 8px;
  background: var(--sf-ochre-50);
  border: 1px solid var(--sf-ochre-200);
  border-radius: var(--sf-radius-pill);
  margin-bottom: var(--sf-space-6);
}
.hero__eyebrow::before {
  content: ''; width: 6px; height: 6px; border-radius: 50%;
  background: var(--sf-ochre-500);
}
.hero h1 {
  font-family: var(--sf-font-display);
  font-size: 68px;
  line-height: 1.02;
  letter-spacing: -0.035em;
  font-weight: var(--sf-weight-semibold);
  color: var(--sf-blue-900);
  margin: 0 0 var(--sf-space-6);
  text-wrap: balance;
}
.hero h1 em {
  font-style: normal;
  color: var(--sf-blue-600);
  position: relative;
}
.hero h1 em::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: 6px;
  height: 8px;
  background: var(--sf-ochre-200);
  z-index: -1;
  border-radius: 2px;
}
.hero__lede {
  font-size: var(--sf-text-md);
  line-height: var(--sf-leading-normal);
  color: var(--sf-ink-700);
  max-width: 52ch;
  margin: 0 0 var(--sf-space-8);
}
.hero__ctas {
  display: flex;
  gap: var(--sf-space-3);
  margin-bottom: var(--sf-space-10);
}
.hero__trust {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sf-space-6) var(--sf-space-8);
  padding-top: var(--sf-space-6);
  border-top: 1px solid var(--sf-border);
  font-size: var(--sf-text-sm);
  color: var(--sf-text-muted);
}
.hero__trust strong {
  display: block;
  color: var(--sf-blue-900);
  font-size: var(--sf-text-lg);
  font-weight: var(--sf-weight-semibold);
  letter-spacing: var(--sf-tracking-tight);
  margin-bottom: 2px;
}

/* ---------------- Logos strip ---------------- */
.logos-strip {
  padding: var(--sf-space-12) 0;
  border-top: 1px solid var(--sf-border);
  border-bottom: 1px solid var(--sf-border);
}
.logos-strip__label {
  text-align: center;
  font-size: var(--sf-text-xs);
  text-transform: uppercase;
  letter-spacing: var(--sf-tracking-caps);
  color: var(--sf-text-muted);
  margin-bottom: var(--sf-space-6);
  font-weight: var(--sf-weight-semibold);
}
.logos-strip__row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--sf-space-8);
  color: var(--sf-ink-500);
  font-weight: var(--sf-weight-semibold);
  letter-spacing: var(--sf-tracking-tight);
  flex-wrap: wrap;
}
.logos-strip__row > span {
  font-size: var(--sf-text-lg);
  opacity: 0.6;
}

/* ---------------- Section wrapper ---------------- */
.section {
  padding: var(--sf-space-24) 0;
}
.section__head {
  max-width: 720px;
  margin: 0 auto var(--sf-space-16);
  text-align: center;
}
.section__eyebrow {
  display: inline-block;
  font-size: var(--sf-text-xs);
  text-transform: uppercase;
  letter-spacing: var(--sf-tracking-caps);
  color: var(--sf-ochre-700);
  font-weight: var(--sf-weight-semibold);
  margin-bottom: var(--sf-space-3);
}
.section__title {
  font-size: var(--sf-text-3xl);
  line-height: 1.1;
  letter-spacing: var(--sf-tracking-tight);
  font-weight: var(--sf-weight-semibold);
  color: var(--sf-blue-900);
  margin: 0 0 var(--sf-space-4);
  text-wrap: balance;
}
.section__lede {
  font-size: var(--sf-text-md);
  color: var(--sf-text-muted);
  max-width: 60ch;
  margin: 0 auto;
}

/* ---------------- Feature grid ---------------- */
.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sf-space-6);
}
.feature {
  padding: var(--sf-space-8);
  border: 1px solid var(--sf-border);
  border-radius: var(--sf-radius-lg);
  background: var(--sf-surface);
  transition: all var(--sf-dur-base) var(--sf-ease);
}
.feature:hover {
  border-color: var(--sf-blue-300);
  box-shadow: var(--sf-shadow-md);
  transform: translateY(-2px);
}
.feature__icon {
  width: 48px; height: 48px;
  border-radius: var(--sf-radius-md);
  background: var(--sf-blue-100);
  display: grid; place-items: center;
  margin-bottom: var(--sf-space-5);
}
.feature__title {
  font-size: var(--sf-text-lg);
  font-weight: var(--sf-weight-semibold);
  color: var(--sf-blue-900);
  margin: 0 0 var(--sf-space-2);
  letter-spacing: var(--sf-tracking-tight);
}
.feature__body {
  color: var(--sf-text-muted);
  margin: 0;
  font-size: var(--sf-text-sm);
  line-height: var(--sf-leading-normal);
}

/* ---------------- Site footer ---------------- */
.site-footer {
  background: var(--sf-ink-900);
  color: rgba(255, 255, 255, 0.6);
  padding: var(--sf-space-16) 0 var(--sf-space-8);
}
.site-footer__inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr 1fr;
  gap: var(--sf-space-8);
  padding-bottom: var(--sf-space-10);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.site-footer__brand img {
  height: 30px;
  filter: brightness(0) invert(1);
  opacity: 0.9;
  margin-bottom: var(--sf-space-3);
}
.site-footer__brand p {
  font-size: var(--sf-text-sm);
  margin: 0;
  max-width: 36ch;
}
.site-footer h5 {
  color: #fff;
  font-size: var(--sf-text-xs);
  text-transform: uppercase;
  letter-spacing: var(--sf-tracking-caps);
  font-weight: var(--sf-weight-semibold);
  margin: 0 0 var(--sf-space-4);
}
.site-footer ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.site-footer a {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  font-size: var(--sf-text-sm);
}
.site-footer a:hover { color: #fff; text-decoration: none; }
.site-footer__legal {
  display: flex;
  justify-content: space-between;
  padding-top: var(--sf-space-6);
  font-size: var(--sf-text-xs);
}
.site-footer__legal a { color: inherit; }

/* ---------------- Responsive ---------------- */
@media (max-width: 1000px) { .features { grid-template-columns: 1fr 1fr; } }
@media (max-width: 900px) {
  .hero { padding: var(--sf-space-12) 0; }
  .hero__inner { grid-template-columns: 1fr; gap: var(--sf-space-10); }
  .hero h1 { font-size: 44px; }
  .site-footer__inner { grid-template-columns: 1fr 1fr; }

  /* Hamburger menu: burger button appears, links become a dropdown panel
     below the bar, toggled by the (visually-hidden) checkbox. */
  .site-nav { position: relative; }
  .site-nav__burger {
    display: inline-flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 44px;
    height: 44px;
    margin-left: auto;
    cursor: pointer;
    border-radius: var(--sf-radius-sm);
  }
  .site-nav__burger span {
    display: block;
    width: 22px;
    height: 2px;
    margin: 0 auto;
    background: var(--sf-ink-800);
    border-radius: 2px;
    transition: transform 0.2s ease, opacity 0.2s ease;
  }
  .site-nav .sf-btn--primary,
  .site-nav .sf-btn--ghost { display: none; }
  .site-nav__links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    flex: none;
    margin: 0;
    padding: var(--sf-space-2) var(--sf-space-8) var(--sf-space-4);
    background: var(--sf-paper);
    border-top: 1px solid var(--sf-border);
    box-shadow: 0 12px 28px rgba(11, 23, 34, 0.12);
    z-index: 50;
  }
  .site-nav__toggle:checked ~ .site-nav__links { display: flex; }
  .site-nav__link {
    padding: var(--sf-space-3) var(--sf-space-2);
    font-size: var(--sf-text-base);
    border-radius: var(--sf-radius-sm);
  }
  .site-nav__toggle:focus-visible ~ .site-nav__burger {
    outline: none;
    box-shadow: var(--sf-shadow-focus, 0 0 0 3px var(--sf-blue-300));
  }
  /* burger → X when the menu is open */
  .site-nav__toggle:checked ~ .site-nav__burger span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .site-nav__toggle:checked ~ .site-nav__burger span:nth-child(2) { opacity: 0; }
  .site-nav__toggle:checked ~ .site-nav__burger span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
}
@media (max-width: 700px) {
  .features { grid-template-columns: 1fr; }
  .logos-strip__row { justify-content: center; }
}