/* ===== Design Tokens ===== */
:root {
  /* Backgrounds */
  --color-bg-white:        #FFFFFF;
  --color-bg-slate:        #F4F6FA;
  --color-bg-dark:         #0B1F3A;

  /* Text */
  --color-text-primary:    #111827;
  --color-text-secondary:  #6B7280;
  --color-text-muted:      #94A3B8;
  --color-text-white:      #FFFFFF;

  /* Accent */
  --color-accent:          #1D72E8;
  --color-accent-hover:    #1558C0;
  --color-accent-light:    #EFF6FF;

  /* Feedback */
  --color-success:         #10B981;
  --color-error:           #DC2626;

  /* Borders */
  --color-border:          #E5E7EB;

  /* Typography */
  --font-sans:             'Inter', sans-serif;
  --font-mono:             'JetBrains Mono', monospace;

  /* Layout */
  --section-padding-y:     80px;
  --content-max-width:     1200px;
  --border-radius:         6px;
  --transition:            0.15s ease;
}

/* ===== Reset & Base ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text-primary);
  background: var(--color-bg-white);
  line-height: 1.6;
  font-size: 1rem;
}

/* ===== Navbar ===== */
/* Sticky, white, border-bottom. Logo left. Links + CTA right. */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-bg-white);
  border-bottom: 1px solid var(--color-border);
}

.navbar__container {
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 64px;
  display: flex;
  align-items: center;
  gap: 2rem;
}

.navbar__logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text-primary);
  text-decoration: none;
  letter-spacing: -0.4px;
  margin-right: auto;
}

.navbar__nav {
  display: flex;
  gap: 1.75rem;
}

.navbar__link {
  color: var(--color-text-primary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9375rem;
  transition: color var(--transition);
}

.navbar__link:hover,
.navbar__link:focus-visible {
  color: var(--color-accent);
}

.navbar__cta {
  flex-shrink: 0;
}

.navbar__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.navbar__toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text-primary);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.navbar__toggle[aria-expanded="true"] .navbar__toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.navbar__toggle[aria-expanded="true"] .navbar__toggle-bar:nth-child(2) {
  opacity: 0;
}
.navbar__toggle[aria-expanded="true"] .navbar__toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ===== Buttons ===== */
/* Primary: blue fill. Secondary: outlined — white variant on dark bg, blue variant on light. */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: var(--border-radius);
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
  line-height: 1;
}

.btn--primary {
  background: var(--color-accent);
  color: var(--color-text-white);
  border-color: var(--color-accent);
}

.btn--primary:hover,
.btn--primary:focus-visible {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
}

/* Secondary on light backgrounds */
.btn--secondary {
  background: transparent;
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.btn--secondary:hover,
.btn--secondary:focus-visible {
  background: var(--color-accent-light);
}

/* Secondary on dark backgrounds (used inside .hero) */
.hero .btn--secondary {
  color: var(--color-text-white);
  border-color: rgba(255, 255, 255, 0.55);
}

.hero .btn--secondary:hover,
.hero .btn--secondary:focus-visible {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.9);
}

.btn--full {
  width: 100%;
  text-align: center;
}

/* ===== Hero ===== */
/* Dark navy, solid — no gradient. 120px padding. */
.hero {
  background: var(--color-bg-dark);
  color: var(--color-text-white);
  padding: 120px 1.5rem;
  text-align: center;
}

.hero__container {
  max-width: 720px;
  margin: 0 auto;
}

.hero__title {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -1.5px;
  margin-bottom: 1.25rem;
  color: var(--color-text-white);
}

.hero__subtitle {
  font-size: 1.25rem;
  color: var(--color-text-muted);
  margin-bottom: 2.5rem;
  line-height: 1.7;
  font-weight: 400;
}

.hero__actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* ===== Trust Bar ===== */
/* Light slate strip below hero */
.trust-bar {
  background: var(--color-bg-slate);
  border-bottom: 1px solid var(--color-border);
  padding: 1.25rem 1.5rem;
}

.trust-bar__container {
  max-width: var(--content-max-width);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem 3rem;
}

.trust-bar__item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-secondary);
}

.trust-bar__icon {
  width: 1rem;
  height: 1rem;
  color: var(--color-accent);
  flex-shrink: 0;
}

/* ===== Features ===== */
/* White section, 3-col card grid. Cards: border, no shadow. */
.features {
  background: var(--color-bg-white);
  padding: var(--section-padding-y) 1.5rem;
}

.features__container {
  max-width: var(--content-max-width);
  margin: 0 auto;
}

.features__heading {
  text-align: center;
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: 0.75rem;
  letter-spacing: -0.5px;
}

.features__subtext {
  text-align: center;
  color: var(--color-text-secondary);
  max-width: 560px;
  margin: 0 auto 3rem;
  font-size: 1rem;
  line-height: 1.7;
}

.features__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

.feature-card {
  background: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: 28px 28px 32px;
  transition: border-color var(--transition);
}

.feature-card:hover {
  border-color: var(--color-accent);
}

.feature-card__icon {
  width: 40px;
  height: 40px;
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent-light);
  border-radius: var(--border-radius);
  color: var(--color-accent);
}

.feature-card__icon svg {
  width: 20px;
  height: 20px;
}

.feature-card__title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: 0.5rem;
}

.feature-card__text {
  color: var(--color-text-secondary);
  font-size: 1rem;
  line-height: 1.65;
}

.features__note {
  text-align: center;
  margin-top: 2.5rem;
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
}

.features__link {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.features__link:hover {
  color: var(--color-accent-hover);
}

/* ===== Services ===== */
/* Light slate section, card grid with border treatment. */
.services {
  background: var(--color-bg-slate);
  padding: var(--section-padding-y) 1.5rem;
}

.services__container {
  max-width: var(--content-max-width);
  margin: 0 auto;
}

.services__heading {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  color: var(--color-text-primary);
  text-align: center;
  margin-bottom: 0.75rem;
  letter-spacing: -0.5px;
}

.services__subtext {
  text-align: center;
  color: var(--color-text-secondary);
  margin-bottom: 3rem;
  font-size: 1rem;
  line-height: 1.7;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

.services__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.service-item {
  display: flex;
  gap: 1.25rem;
  align-items: flex-start;
  background: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: 24px;
  transition: border-color var(--transition);
}

.service-item:hover {
  border-color: var(--color-accent);
}

.service-item__icon {
  width: 40px;
  height: 40px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent-light);
  border-radius: var(--border-radius);
  color: var(--color-accent);
}

.service-item__icon svg {
  width: 20px;
  height: 20px;
}

.service-item__title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: 0.25rem;
}

.service-item__text {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  line-height: 1.65;
}

@media (min-width: 640px) {
  .services__list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
  }

  .service-item:last-child:nth-child(odd) {
    grid-column: 1 / -1;
    max-width: calc(50% - 0.5rem);
  }
}

/* ===== About ===== */
/* White section, 2-col on desktop. Stat numbers in mono font. */
.about {
  background: var(--color-bg-white);
  padding: var(--section-padding-y) 1.5rem;
}

.about__container {
  max-width: var(--content-max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
}

.about__heading {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: 1.25rem;
  letter-spacing: -0.5px;
}

.about__text {
  color: var(--color-text-secondary);
  line-height: 1.75;
  margin-bottom: 1rem;
  font-size: 1rem;
}

.about__text:last-child {
  margin-bottom: 0;
}

.about__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

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

.stat__number {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1rem, 2vw, 1.25rem);
  font-weight: 500;
  color: var(--color-accent);
  margin-bottom: 0.375rem;
  line-height: 1.2;
}

.stat__label {
  display: block;
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  line-height: 1.4;
}

@media (min-width: 768px) {
  .about__container {
    grid-template-columns: 3fr 2fr;
    align-items: center;
  }
}

/* ===== Contact ===== */
/* Light slate section to alternate with white above. */
.contact {
  background: var(--color-bg-slate);
  padding: var(--section-padding-y) 1.5rem;
}

.contact__container {
  max-width: 600px;
  margin: 0 auto;
}

.contact__heading {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: 0.5rem;
  text-align: center;
  letter-spacing: -0.5px;
}

.contact__subtext {
  text-align: center;
  color: var(--color-text-secondary);
  margin-bottom: 2.5rem;
  line-height: 1.7;
  font-size: 1rem;
}

.contact__form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.contact__privacy-notice {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
  padding: 0.875rem 1rem;
  background: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
}

.contact__success {
  text-align: center;
  color: var(--color-success);
  font-weight: 600;
  padding: 0.75rem;
  background: #ECFDF5;
  border: 1px solid #A7F3D0;
  border-radius: var(--border-radius);
}

/* ===== Form Group ===== */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.form-group__label {
  font-weight: 500;
  font-size: 0.9375rem;
  color: var(--color-text-primary);
}

.form-group__input {
  padding: 0.75rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  font-family: var(--font-sans);
  font-size: 1rem;
  color: var(--color-text-primary);
  background: var(--color-bg-white);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
  width: 100%;
}

.form-group__input:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(29, 114, 232, 0.15);
}

.form-group__input--invalid {
  border-color: var(--color-error);
  box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.1);
}

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

.form-group__error {
  color: var(--color-error);
  font-size: 0.8125rem;
  min-height: 1em;
}

.form-group--consent {
  gap: 0.5rem;
}

.form-group__consent-label {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
  font-size: 0.9rem;
  line-height: 1.55;
  color: var(--color-text-primary);
  cursor: pointer;
}

.form-group__checkbox {
  flex-shrink: 0;
  width: 1.125rem;
  height: 1.125rem;
  margin-top: 0.15rem;
  accent-color: var(--color-accent);
  cursor: pointer;
}

.form-group__privacy-link {
  color: var(--color-accent);
  text-underline-offset: 2px;
}

.form-group__privacy-link:hover {
  color: var(--color-accent-hover);
}

/* ===== Footer ===== */
/* Dark navy, 4-column: Brand / Product / Company / Legal */
.footer {
  background: var(--color-bg-dark);
  color: var(--color-text-muted);
  padding: 64px 1.5rem 0;
}

.footer__container {
  max-width: var(--content-max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer__logo {
  display: block;
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-text-white);
  margin-bottom: 0.5rem;
  letter-spacing: -0.3px;
}

.footer__tagline {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  margin-bottom: 0.5rem;
}

.footer__desc {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  max-width: 240px;
}

.footer__col-heading {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-text-white);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 1rem;
}

.footer__nav {
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.footer__link {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color var(--transition);
  display: inline-block;
}

.footer__link:hover {
  color: var(--color-text-white);
}

.footer__legal-note {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.65;
  margin-bottom: 0.75rem;
}

.footer__bottom {
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: 1.25rem 0 1.5rem;
}

.footer__copy {
  font-size: 0.8125rem;
  color: rgba(148, 163, 184, 0.5);
  text-align: center;
}

@media (min-width: 640px) {
  .footer__container {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer__col--brand {
    grid-column: 1 / -1;
  }
}

@media (min-width: 960px) {
  .footer__container {
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
  }

  .footer__col--brand {
    grid-column: auto;
  }
}

/* ===== Responsive ===== */
@media (min-width: 640px) {
  .features__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

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

@media (max-width: 639px) {
  .about__stats {
    grid-template-columns: 1fr;
  }

  .navbar__nav {
    display: none;
    flex-direction: column;
    gap: 0;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--color-bg-white);
    border-bottom: 1px solid var(--color-border);
    padding: 0.5rem 0;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  }

  .navbar__nav.is-open {
    display: flex;
  }

  .navbar__link {
    padding: 0.875rem 1.5rem;
    display: block;
  }

  .navbar__link:hover {
    background: var(--color-bg-slate);
  }

  .navbar__toggle {
    display: flex;
  }

  .navbar__cta {
    display: none;
  }
}

@media (min-width: 640px) {
  .navbar__toggle {
    display: none;
  }
}

/* ===== Focus visible ===== */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}