/* FlowLedger — Production Landing Page Styles */
:root {
  --color-primary: #0d4f8b;
  --color-primary-dark: #083a66;
  --color-primary-light: #e8f2fa;
  --color-accent: #0a7c6e;
  --color-accent-light: #e6f5f3;
  --color-text: #1a2332;
  --color-text-muted: #5a6578;
  --color-border: #dde3ec;
  --color-bg: #ffffff;
  --color-bg-alt: #f7f9fc;
  --color-success: #0a7c6e;
  --font-sans: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
  --shadow-sm: 0 1px 3px rgba(26, 35, 50, 0.06);
  --shadow-md: 0 4px 20px rgba(26, 35, 50, 0.08);
  --shadow-lg: 0 12px 40px rgba(26, 35, 50, 0.1);
  --radius: 8px;
  --radius-lg: 12px;
  --header-h: 72px;
  --max-w: 1200px;
  --transition: 0.2s ease;
}

*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover { color: var(--color-primary-dark); }

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  z-index: 10000;
  padding: 0.75rem 1.25rem;
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--radius);
}

.skip-link:focus { top: 1rem; }

.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.25rem;
}

.section {
  padding: 5rem 0;
}

.section--alt { background: var(--color-bg-alt); }

.section__header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 3rem;
}

.section__label {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 0.75rem;
}

.section__title {
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 700;
  line-height: 1.25;
  margin: 0 0 1rem;
  color: var(--color-text);
}

.section__desc {
  font-size: 1.0625rem;
  color: var(--color-text-muted);
  margin: 0;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.4;
  border-radius: var(--radius);
  border: 2px solid transparent;
  cursor: pointer;
  transition: background var(--transition), color var(--transition), border-color var(--transition), box-shadow var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.btn--primary {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

.btn--primary:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  color: #fff;
}

.btn--outline {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn--outline:hover {
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
}

.btn--ghost {
  background: transparent;
  color: var(--color-text-muted);
  border-color: var(--color-border);
}

.btn--ghost:hover {
  background: var(--color-bg-alt);
  color: var(--color-text);
}

.btn--lg { padding: 0.875rem 1.75rem; font-size: 1rem; }

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-h);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.header.is-scrolled {
  border-bottom-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
  gap: 1.5rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  text-decoration: none;
  color: var(--color-text);
  font-weight: 700;
  font-size: 1.125rem;
}

.logo__icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 0.875rem;
  font-weight: 800;
}

.nav { display: none; }

.nav__list {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav__link {
  padding: 0.5rem 0.875rem;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-muted);
  border-radius: var(--radius);
  transition: color var(--transition), background var(--transition);
}

.nav__link:hover {
  color: var(--color-text);
  background: var(--color-bg-alt);
}

.header__actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.header__actions .btn--outline,
.header__actions .btn--primary { display: none; }

.menu-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 8px;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  cursor: pointer;
}

.menu-toggle__bar {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-text);
  border-radius: 1px;
  transition: transform var(--transition), opacity var(--transition);
}

.menu-toggle[aria-expanded="true"] .menu-toggle__bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.menu-toggle[aria-expanded="true"] .menu-toggle__bar:nth-child(2) { opacity: 0; }

.menu-toggle[aria-expanded="true"] .menu-toggle__bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.mobile-nav {
  display: none;
  position: fixed;
  top: var(--header-h);
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-bg);
  padding: 1.5rem;
  overflow-y: auto;
  z-index: 999;
}

.mobile-nav.is-open { display: block; }

.mobile-nav__list {
  list-style: none;
  margin: 0 0 1.5rem;
  padding: 0;
}

.mobile-nav__link {
  display: block;
  padding: 0.875rem 0;
  font-size: 1.0625rem;
  font-weight: 500;
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border);
}

.mobile-nav__actions {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.mobile-nav__actions .btn { width: 100%; }

@media (min-width: 992px) {
  .nav { display: block; }
  .menu-toggle { display: none; }
  .header__actions .btn--outline,
  .header__actions .btn--primary { display: inline-flex; }
}

/* Hero */
.hero {
  padding: calc(var(--header-h) + 3rem) 0 5rem;
  background: linear-gradient(180deg, var(--color-primary-light) 0%, var(--color-bg) 60%);
}

.hero__grid {
  display: grid;
  gap: 3rem;
  align-items: center;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.375rem 0.875rem;
  background: var(--color-accent-light);
  color: var(--color-accent);
  font-size: 0.8125rem;
  font-weight: 600;
  border-radius: 100px;
  margin-bottom: 1.25rem;
}

.hero__title {
  font-size: clamp(2rem, 5vw, 2.75rem);
  font-weight: 800;
  line-height: 1.15;
  margin: 0 0 1.25rem;
  color: var(--color-text);
}

.hero__subtitle {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  margin: 0 0 2rem;
  max-width: 540px;
}

.hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2rem;
}

.hero__trust {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
}

.hero__trust-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.hero__trust-icon {
  width: 20px;
  height: 20px;
  color: var(--color-accent);
  flex-shrink: 0;
}

.hero__visual {
  position: relative;
}

.hero__figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border);
  background: var(--color-bg-alt);
}

.hero__image {
  width: 100%;
  height: auto;
  aspect-ratio: 3/2;
  object-fit: cover;
  display: block;
}

.hero__caption {
  padding: 0.75rem 1rem;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  text-align: center;
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
}

/* Use case gallery */
.usecase-gallery {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

.usecase-card {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  box-shadow: var(--shadow-sm);
}

.usecase-card img {
  width: 100%;
  aspect-ratio: 3/2;
  object-fit: cover;
}

.usecase-card figcaption {
  padding: 0.625rem 0.75rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-text);
  text-align: center;
}

@media (min-width: 576px) {
  .usecase-gallery { grid-template-columns: repeat(4, 1fr); }
}

/* About image */
.about__figure {
  margin: 0 0 1.5rem;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
}

.about__figure img {
  width: 100%;
  aspect-ratio: 3/2;
  object-fit: cover;
}

.about__caption {
  padding: 0.75rem 1rem;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  text-align: center;
  background: var(--color-bg-alt);
}

@media (min-width: 992px) {
  .hero { padding: calc(var(--header-h) + 4rem) 0 6rem; }
  .hero__grid { grid-template-columns: 1fr 1fr; }
}

/* Trust */
.trust__grid {
  display: grid;
  gap: 2rem;
}

.trust__stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.trust__stat {
  text-align: center;
  padding: 1.5rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.trust__stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.25rem;
}

.trust__stat-label {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.trust__placeholder {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  font-style: italic;
  margin-top: 0.25rem;
}

.trust__logos {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
  align-items: center;
}

.trust__logo-item {
  width: 120px;
  height: 48px;
  background: var(--color-bg-alt);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.6875rem;
  color: var(--color-text-muted);
  text-align: center;
  padding: 0.5rem;
}

.trust__reviews {
  display: grid;
  gap: 1rem;
}

.trust__review {
  padding: 1.25rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.trust__review-text {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  margin: 0 0 0.75rem;
  font-style: italic;
}

.trust__review-meta {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

@media (min-width: 768px) {
  .trust__grid { grid-template-columns: 1fr 2fr; }
  .trust__stats { grid-template-columns: repeat(4, 1fr); }
}

/* Features */
.features__grid {
  display: grid;
  gap: 1.5rem;
}

.feature-card {
  padding: 1.75rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: box-shadow var(--transition), border-color var(--transition);
}

.feature-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary-light);
}

.feature-card__icon {
  width: 48px;
  height: 48px;
  background: var(--color-primary-light);
  color: var(--color-primary);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  margin-bottom: 1rem;
}

.feature-card__title {
  font-size: 1.125rem;
  font-weight: 700;
  margin: 0 0 0.5rem;
}

.feature-card__desc {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  margin: 0;
}

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

@media (min-width: 992px) {
  .features__grid { grid-template-columns: repeat(3, 1fr); }
}

/* Steps */
.steps {
  display: grid;
  gap: 2rem;
  counter-reset: step;
}

.step {
  display: flex;
  gap: 1.5rem;
  padding: 2rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.step__number {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  background: var(--color-primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.125rem;
}

.step__title {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 0 0 0.5rem;
}

.step__desc {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  margin: 0;
}

@media (min-width: 992px) {
  .steps { grid-template-columns: repeat(3, 1fr); }
  .step { flex-direction: column; text-align: center; }
  .step__number { margin: 0 auto; }
}

/* Benefits */
.benefits__grid {
  display: grid;
  gap: 1.5rem;
}

.benefit-item {
  display: flex;
  gap: 1rem;
  padding: 1.5rem;
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
}

.benefit-item__check {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  color: var(--color-accent);
}

.benefit-item__title {
  font-weight: 700;
  margin: 0 0 0.25rem;
}

.benefit-item__desc {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  margin: 0;
}

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

/* Comparison */
.comparison-table-wrapper {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-bg);
}

.comparison-table {
  width: 100%;
  min-width: 600px;
  border-collapse: collapse;
  font-size: 0.9375rem;
}

.comparison-table th,
.comparison-table td {
  padding: 1rem 1.25rem;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

.comparison-table th {
  background: var(--color-bg-alt);
  font-weight: 600;
}

.comparison-table th:first-child { width: 35%; }

.comparison-table .col-highlight {
  background: var(--color-primary-light);
  font-weight: 500;
}

.comparison-table tr:last-child td { border-bottom: none; }

.comparison-note {
  margin-top: 1rem;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

/* FAQ */
.faq__list {
  max-width: 800px;
  margin: 0 auto;
}

.faq__item {
  border-bottom: 1px solid var(--color-border);
}

.faq__question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.25rem 0;
  background: none;
  border: none;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 600;
  text-align: left;
  color: var(--color-text);
  cursor: pointer;
}

.faq__icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  transition: transform var(--transition);
}

.faq__item.is-open .faq__icon { transform: rotate(180deg); }

.faq__answer {
  display: none;
  padding: 0 0 1.25rem;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

.faq__item.is-open .faq__answer { display: block; }

/* About */
.about__grid {
  display: grid;
  gap: 3rem;
  align-items: start;
}

.about__content p {
  color: var(--color-text-muted);
  margin: 0 0 1rem;
}

.about__values {
  display: grid;
  gap: 1rem;
}

.about__value {
  padding: 1.25rem;
  background: var(--color-bg-alt);
  border-radius: var(--radius-lg);
  border-left: 4px solid var(--color-primary);
}

.about__value h3 {
  font-size: 1rem;
  margin: 0 0 0.375rem;
}

.about__value p {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin: 0;
}

@media (min-width: 992px) {
  .about__grid { grid-template-columns: 1.2fr 1fr; }
}

/* Contact */
.contact__grid {
  display: grid;
  gap: 3rem;
}

.contact__info {
  display: grid;
  gap: 1.5rem;
}

.contact__item h3 {
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
  margin: 0 0 0.375rem;
}

.contact__item p,
.contact__item a {
  margin: 0;
  font-size: 1rem;
}

.contact-form {
  display: grid;
  gap: 1rem;
}

.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 0.375rem;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.75rem 1rem;
  font-family: inherit;
  font-size: 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg);
  transition: border-color var(--transition);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--color-primary);
  outline: none;
  box-shadow: 0 0 0 3px rgba(13, 79, 139, 0.12);
}

.form-group textarea { min-height: 120px; resize: vertical; }

.form-note {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.form-success {
  display: none;
  padding: 1rem;
  background: var(--color-accent-light);
  color: var(--color-accent);
  border-radius: var(--radius);
  font-size: 0.9375rem;
}

.form-success.is-visible { display: block; }

@media (min-width: 992px) {
  .contact__grid { grid-template-columns: 1fr 1.2fr; }
}

/* CTA Banner */
.cta-banner {
  padding: 4rem 0;
  background: var(--color-primary);
  color: #fff;
  text-align: center;
}

.cta-banner__title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin: 0 0 1rem;
}

.cta-banner__desc {
  opacity: 0.9;
  margin: 0 auto 2rem;
  max-width: 560px;
}

.cta-banner .btn--primary {
  background: #fff;
  color: var(--color-primary);
  border-color: #fff;
}

.cta-banner .btn--primary:hover {
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
}

/* Footer */
.footer {
  background: #0f1923;
  color: #a8b4c4;
  padding: 4rem 0 2rem;
  font-size: 0.875rem;
}

.footer a {
  color: #c8d2de;
  transition: color var(--transition);
}

.footer a:hover { color: #fff; }

.footer__grid {
  display: grid;
  gap: 2.5rem;
  margin-bottom: 3rem;
}

.footer__brand .logo {
  color: #fff;
  margin-bottom: 1rem;
}

.footer__brand p {
  margin: 0;
  line-height: 1.6;
  max-width: 280px;
}

.footer__col h4 {
  color: #fff;
  font-size: 0.875rem;
  font-weight: 600;
  margin: 0 0 1rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.footer__links {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer__links li { margin-bottom: 0.5rem; }

.footer__bottom {
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.footer__legal {
  font-size: 0.8125rem;
  line-height: 1.6;
}

@media (min-width: 768px) {
  .footer__grid { grid-template-columns: 2fr repeat(3, 1fr); }
  .footer__bottom { flex-direction: row; justify-content: space-between; align-items: center; }
}

/* Legal pages */
.legal-page {
  padding: calc(var(--header-h) + 3rem) 0 4rem;
}

.legal-page h1 {
  font-size: 2rem;
  margin: 0 0 0.5rem;
}

.legal-page .legal-updated {
  color: var(--color-text-muted);
  font-size: 0.875rem;
  margin-bottom: 2rem;
}

.legal-page h2 {
  font-size: 1.25rem;
  margin: 2rem 0 0.75rem;
}

.legal-page p,
.legal-page li {
  color: var(--color-text-muted);
  font-size: 0.9375rem;
}

.legal-page ul { padding-left: 1.25rem; }

.legal-page a { word-break: break-all; }