/**
 * FAST Homepage — Design Bible v1
 * Source: 07-homepage.md · 03-colors.md · 05-components.md
 */

/* ─── Page shell ─── */
.fast-site.fast-home {
  background: var(--color-bg-base);
}

.fast-skip {
  position: absolute;
  left: -9999px;
  top: var(--space-4);
  z-index: calc(var(--z-header) + 100);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-input);
  background: var(--color-primary);
  color: #fff;
  font-weight: 600;
}

.fast-skip:focus {
  left: var(--space-4);
}

/* ─── Navigation ─── */
.fast-nav {
  position: fixed;
  top: 0;
  right: 0;
  left: 0;
  z-index: var(--z-header);
  height: var(--nav-height);
  border-bottom: 1px solid transparent;
  backdrop-filter: blur(0);
  transition:
    background-color var(--duration-normal) var(--ease-out),
    border-color var(--duration-normal) var(--ease-out),
    backdrop-filter var(--duration-normal) var(--ease-out);
}

.fast-nav--solid {
  background: var(--color-bg-overlay);
  border-bottom-color: var(--color-border-subtle);
  backdrop-filter: blur(20px);
}

.fast-nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  height: 100%;
}

.fast-nav__brand {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: -0.03em;
  color: var(--color-text-primary);
}

.fast-nav__links {
  display: none;
  align-items: center;
  gap: var(--space-8);
}

.fast-nav__links a {
  font-size: var(--text-body-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  transition: color var(--duration-fast) var(--ease-out);
}

.fast-nav__links a:hover {
  color: var(--color-text-primary);
}

.fast-nav__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.fast-nav__lang {
  font-size: var(--text-caption);
  font-weight: 500;
  color: var(--color-text-muted);
}

.fast-nav__lang a[aria-current="true"] {
  color: var(--color-text-primary);
}

.fast-nav__toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--color-text-primary);
  cursor: pointer;
}

.fast-nav__toggle svg {
  width: 20px;
  height: 20px;
}

.fast-nav__backdrop {
  position: fixed;
  inset: 0;
  z-index: calc(var(--z-drawer) - 1);
  background: rgba(0, 0, 0, 0.48);
  backdrop-filter: blur(4px);
}

.fast-nav__drawer {
  position: fixed;
  top: 0;
  right: 0;
  z-index: var(--z-drawer);
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  width: min(var(--drawer-width), calc(100vw - var(--space-8)));
  height: 100vh;
  padding: calc(var(--nav-height) + var(--space-6)) var(--space-6) var(--space-6);
  background: var(--color-bg-surface);
  border-left: 1px solid var(--color-border-subtle);
  transform: translateX(100%);
  transition: transform 300ms var(--ease-out);
}

.fast-nav__drawer:not([hidden]) {
  transform: translateX(0);
}

.fast-nav__drawer a {
  font-size: var(--text-body);
  font-weight: 500;
  color: var(--color-text-secondary);
}

.fast-nav__drawer a:hover {
  color: var(--color-text-primary);
}

@media (min-width: 1024px) {
  .fast-nav__links {
    display: flex;
  }

  .fast-nav__toggle {
    display: none;
  }
}

/* ─── Hero ─── */
.fast-hero {
  min-height: 90vh;
  padding-top: calc(var(--nav-height) + var(--space-16));
  padding-bottom: var(--space-20);
  background: var(--color-bg-base);
  background-image: var(--gradient-hero-ambient);
  background-repeat: no-repeat;
}

.fast-hero__grid {
  display: grid;
  gap: var(--space-12);
  align-items: center;
}

.fast-hero__copy {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  max-width: var(--hero-content-max);
}

.fast-hero__wordmark {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.5rem);
  font-weight: 600;
  letter-spacing: -0.04em;
  line-height: 1;
  color: var(--color-text-primary);
}

.fast-hero__category {
  font-size: var(--text-overline);
  font-weight: 600;
  letter-spacing: var(--tracking-overline);
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.fast-hero__title {
  font-size: clamp(2rem, 4.5vw, 3rem);
  line-height: 1.08;
  letter-spacing: -0.03em;
}

.fast-hero__lead {
  max-width: 36ch;
  font-size: var(--text-body-lg);
  color: var(--color-text-secondary);
  line-height: 1.65;
}

.fast-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  padding-top: var(--space-2);
}

.fast-hero__trust {
  font-size: var(--text-caption);
  color: var(--color-text-muted);
}

.fast-hero__visual {
  min-width: 0;
}

@media (min-width: 1024px) {
  .fast-hero__grid {
    grid-template-columns: 45fr 55fr;
    gap: var(--space-8);
  }
}

/* ─── Device frame ─── */
.fast-device {
  width: 100%;
  max-width: 640px;
  margin-inline: auto;
}

.fast-device__lid {
  position: relative;
  padding: var(--space-3) var(--space-3) var(--space-2);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-card) var(--radius-card) 0 0;
  background: linear-gradient(180deg, var(--color-bg-surface-hover), var(--color-bg-surface));
  box-shadow: var(--shadow-lg);
}

.fast-device__camera {
  display: block;
  width: 8px;
  height: 8px;
  margin: 0 auto var(--space-2);
  border-radius: 50%;
  background: var(--color-border-strong);
}

.fast-device__screen {
  overflow: hidden;
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-sm);
  aspect-ratio: 16 / 10;
  background: var(--color-bg-base);
}

.fast-device__screen .fast-vignette {
  font-size: clamp(8px, 1.1vw, 10px);
}

.fast-device__base {
  height: 14px;
  border: 1px solid var(--color-border-subtle);
  border-top: none;
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  background: var(--color-bg-surface);
}

/* ─── Sections ─── */
.fast-home-section {
  padding-block: var(--section-padding-y);
}

.fast-home-section--raised {
  background: var(--color-bg-raised);
}

.fast-home-section__header {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  max-width: var(--reading-max);
  margin-bottom: var(--space-12);
}

.fast-home-section__header--center {
  margin-inline: auto;
  text-align: center;
  align-items: center;
}

/* ─── Trust metrics ─── */
.fast-trust__grid {
  display: grid;
  gap: var(--space-8);
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.fast-trust__item {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  min-height: 120px;
  padding: var(--space-8);
  border: 1px solid transparent;
  border-radius: var(--radius-card);
  background: var(--color-bg-surface);
}

.fast-trust__value {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 600;
  color: var(--color-text-primary);
}

.fast-trust__label {
  font-size: var(--text-body-sm);
  color: var(--color-text-muted);
}

@media (min-width: 768px) {
  .fast-trust__grid {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
}

/* ─── Problem / Solution ─── */
.fast-compare {
  display: grid;
  gap: var(--space-6);
  align-items: stretch;
}

.fast-compare__panel {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  min-height: 280px;
  padding: var(--space-8);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-card);
  background: var(--color-bg-surface);
}

.fast-compare__panel--problem {
  border-color: rgba(239, 68, 68, 0.2);
}

.fast-compare__panel--solution {
  border-color: rgba(37, 99, 235, 0.25);
  background: var(--color-brand-primary-muted);
}

.fast-compare__panel h3 {
  font-size: var(--text-heading);
}

.fast-compare__panel ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.fast-compare__panel li {
  position: relative;
  padding-left: var(--space-5);
  font-size: var(--text-body-sm);
  color: var(--color-text-secondary);
}

.fast-compare__panel li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-text-muted);
}

.fast-compare__bridge {
  display: none;
}

@media (min-width: 1024px) {
  .fast-compare {
    grid-template-columns: 1fr auto 1fr;
    gap: var(--space-8);
  }

  .fast-compare__bridge {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    color: var(--color-text-muted);
  }

  .fast-compare__bridge svg {
    width: 24px;
    height: 24px;
  }
}

/* ─── Showcase ─── */
.fast-showcase__frame {
  overflow: hidden;
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-md);
  aspect-ratio: 16 / 10;
  min-height: 320px;
  background: var(--color-bg-base);
}

.fast-showcase__frame .fast-vignette--analytics {
  height: 100%;
  font-size: clamp(9px, 1.2vw, 11px);
}

.fast-showcase__features {
  display: grid;
  gap: var(--space-8);
  margin-top: var(--space-8);
}

.fast-showcase__feature {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border-divider);
}

.fast-showcase__feature strong {
  font-family: var(--font-display);
  font-size: var(--text-body);
  font-weight: 600;
  color: var(--color-text-primary);
}

.fast-showcase__feature span {
  font-size: var(--text-body-sm);
  color: var(--color-text-muted);
}

@media (min-width: 768px) {
  .fast-showcase__features {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ─── Modules ─── */
.fast-modules__grid {
  display: grid;
  gap: var(--space-8);
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.fast-module-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  min-height: 180px;
  padding: var(--space-6);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-card);
  background: var(--color-bg-surface);
  overflow: hidden;
  transition:
    border-color var(--duration-normal) var(--ease-out),
    transform var(--duration-normal) var(--ease-out);
}

.fast-module-card--preview {
  padding-bottom: var(--space-4);
}

.fast-module-card:hover,
.fast-module-card:focus-within {
  border-color: var(--color-border-default);
  transform: translateY(-2px);
}

.fast-module-card__preview {
  max-height: 0;
  margin-top: auto;
  opacity: 0;
  overflow: hidden;
  transition:
    max-height var(--duration-normal) var(--ease-out),
    opacity var(--duration-normal) var(--ease-out),
    margin-top var(--duration-normal) var(--ease-out);
}

.fast-module-card--preview:hover .fast-module-card__preview,
.fast-module-card--preview:focus-within .fast-module-card__preview {
  max-height: 96px;
  margin-top: var(--space-3);
  opacity: 1;
}

@media (prefers-reduced-motion: reduce) {
  .fast-module-card__preview {
    max-height: none;
    opacity: 1;
    margin-top: var(--space-3);
  }
}

@media (max-width: 767px) {
  .fast-module-card__preview {
    max-height: none;
    opacity: 1;
    margin-top: var(--space-3);
  }
}

.fast-module-card__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: var(--color-bg-surface-hover);
  color: var(--color-text-secondary);
}

.fast-module-card__icon svg {
  width: 22px;
  height: 22px;
}

.fast-module-card h3 {
  font-size: var(--text-body);
  font-weight: 600;
}

.fast-module-card p {
  font-size: var(--text-body-sm);
  color: var(--color-text-muted);
  line-height: 1.55;
}

@media (min-width: 768px) {
  .fast-modules__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ─── Integration SVG diagram ─── */
.fast-integration__svg {
  width: 100%;
  max-width: 960px;
  margin-inline: auto;
}

.fast-integration__svg svg {
  width: 100%;
  height: auto;
  display: block;
}

/* ─── Industry ─── */
.fast-industry__grid {
  display: grid;
  gap: var(--space-8);
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.fast-industry__card {
  min-height: 100px;
  padding: var(--space-6);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-card);
  background: var(--color-bg-surface);
}

.fast-industry__card h3 {
  margin-bottom: var(--space-2);
  font-size: var(--text-body);
}

.fast-industry__card p {
  font-size: var(--text-body-sm);
  color: var(--color-text-muted);
}

@media (min-width: 768px) {
  .fast-industry__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ─── Pricing ─── */
.fast-pricing__grid {
  display: grid;
  gap: var(--space-8);
  align-items: stretch;
}

.fast-pricing__tier {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  min-height: 360px;
  padding: var(--space-8);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-card);
  background: var(--color-bg-surface);
}

.fast-pricing__tier--featured {
  border-color: rgba(37, 99, 235, 0.35);
  background: var(--color-brand-primary-muted);
}

.fast-pricing__tier h3 {
  font-size: var(--text-heading);
}

.fast-pricing__tier .fast-caption {
  flex: 1;
}

.fast-pricing__tier ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.fast-pricing__tier li {
  font-size: var(--text-body-sm);
  color: var(--color-text-secondary);
}

.fast-pricing__tier .fast-btn {
  margin-top: auto;
}

@media (min-width: 1024px) {
  .fast-pricing__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ─── Final CTA ─── */
.fast-final-cta {
  padding-block: var(--section-padding-y);
  background: var(--color-bg-base);
  background-image: var(--gradient-cta-glow);
  background-repeat: no-repeat;
  background-position: center bottom;
}

.fast-final-cta__inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  align-items: center;
  max-width: var(--content-max);
  margin-inline: auto;
  text-align: center;
}

.fast-final-cta__inner h2 {
  font-size: var(--text-display-md);
}

.fast-final-cta__inner p {
  max-width: 48ch;
  font-size: var(--text-body-lg);
  color: var(--color-text-secondary);
}

.fast-final-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  justify-content: center;
}

/* ─── Footer ─── */
.fast-footer {
  padding-top: var(--space-24);
  padding-bottom: var(--space-12);
  border-top: 1px solid var(--color-border-divider);
  background: var(--color-bg-raised);
}

.fast-footer__grid {
  display: grid;
  gap: var(--space-8);
  margin-bottom: var(--space-12);
}

.fast-footer__col h4 {
  margin-bottom: var(--space-4);
  font-family: var(--font-body);
  font-size: var(--text-caption);
  font-weight: 600;
  letter-spacing: var(--tracking-overline);
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.fast-footer__col ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.fast-footer__col a {
  font-size: var(--text-body-sm);
  color: var(--color-text-secondary);
  transition: color var(--duration-fast) var(--ease-out);
}

.fast-footer__col a:hover {
  color: var(--color-text-primary);
}

.fast-footer__brand {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-text-primary);
}

.fast-footer__credit {
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-border-divider);
  font-size: var(--text-caption);
  color: var(--color-text-muted);
  text-align: center;
}

@media (min-width: 768px) {
  .fast-footer__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .fast-footer__grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
  }
}

.fast-footer__prose {
  margin-top: var(--space-4);
  max-width: 28ch;
  font-size: var(--text-body-sm);
  color: var(--color-text-muted);
}

@media (max-width: 1023px) {
  .fast-hero {
    min-height: auto;
    padding-bottom: var(--space-12);
  }
}