/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 16px;
  border-radius: var(--radius-md);
  padding: 0 var(--space-6);
  height: 52px;
  transition: transform var(--duration-hover) var(--ease-out),
    box-shadow var(--duration-hover) var(--ease-out),
    background var(--duration-hover) var(--ease-out),
    border-color var(--duration-hover) var(--ease-out);
  white-space: nowrap;
}

.btn--xl {
  height: 56px;
  padding-inline: var(--space-7);
  font-size: 17px;
}

.btn--primary {
  background: var(--gradient-primary);
  color: var(--color-white);
  box-shadow: 0 4px 20px rgba(37, 99, 235, 0.35);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(37, 99, 235, 0.45);
}

.btn--primary:active {
  transform: translateY(-1px);
}

.btn--secondary {
  background: transparent;
  color: var(--color-white);
  border: 1.5px solid rgba(37, 99, 235, 0.6);
}

.btn--secondary:hover {
  background: rgba(37, 99, 235, 0.12);
  border-color: var(--color-primary);
}

.btn--outline {
  background: transparent;
  color: var(--color-primary);
  border: 1.5px solid var(--color-primary);
}

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

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

.btn--white:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn--ghost-outline {
  background: transparent;
  color: var(--color-white);
  border: 1.5px solid rgba(255, 255, 255, 0.4);
}

.btn--ghost-outline:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--color-white);
}

.btn__arrow {
  transition: transform var(--duration-hover) var(--ease-out);
}

.btn:hover .btn__arrow {
  transform: translateX(4px);
}

/* Horizontal button groups — ref mockup uses side-by-side CTAs */
.btn-row {
  display: flex;
  flex-direction: row;
  flex-wrap: nowrap;
  align-items: center;
  gap: var(--space-4);
}

.btn-row--center {
  justify-content: center;
}

.btn-row--wrap-tablet {
  flex-wrap: nowrap;
}

.btn-row .btn {
  flex: 0 0 auto;
  width: auto;
}

@media (max-width: 640px) {
  .btn-row,
  .btn-row--wrap-tablet {
    flex-wrap: wrap;
  }
}

.btn--hero {
  height: 48px;
  padding-inline: var(--space-5);
  font-size: 15px;
}

/* Navigation */
.nav {
  --nav-progress: 0;
  --nav-height-current: calc(
    var(--nav-height) -
    (var(--nav-height) - var(--nav-height-scrolled)) * var(--nav-progress)
  );
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  height: var(--nav-height-current);
  display: flex;
  align-items: center;
  animation: fade-up 0.6s var(--ease-out) both;
  background: rgba(11, 17, 32, calc(0.78 * var(--nav-progress)));
  backdrop-filter: blur(calc(var(--nav-blur-min) + (var(--blur-nav) - var(--nav-blur-min)) * var(--nav-progress)));
  -webkit-backdrop-filter: blur(calc(var(--nav-blur-min) + (var(--blur-nav) - var(--nav-blur-min)) * var(--nav-progress)));
  box-shadow:
    0 calc(4px * var(--nav-progress))
    calc(28px * var(--nav-progress))
    rgba(0, 0, 0, calc(0.22 * var(--nav-progress)));
}

@media (prefers-reduced-motion: reduce) {
  .nav {
    transition:
      height var(--duration-nav) var(--ease-out),
      background var(--duration-nav) var(--ease-out),
      backdrop-filter var(--duration-nav) var(--ease-out),
      -webkit-backdrop-filter var(--duration-nav) var(--ease-out),
      box-shadow var(--duration-nav) var(--ease-out);
  }

  .nav__logo {
    transition:
      font-size var(--duration-nav) var(--ease-out),
      gap var(--duration-nav) var(--ease-out),
      letter-spacing var(--duration-nav) var(--ease-out);
  }

  .nav__logo-icon {
    transition:
      width var(--duration-nav) var(--ease-out),
      height var(--duration-nav) var(--ease-out);
  }
}

.nav__inner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: var(--space-5);
  width: var(--container-width);
  margin-inline: auto;
  padding-inline: 0;
}

.nav__links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-5);
  flex-wrap: nowrap;
}

.nav__link {
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.85);
  position: relative;
  padding-block: var(--space-2);
  white-space: nowrap;
  transition: color var(--duration-hover) var(--ease-out);
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: calc(var(--space-3) - 2px * var(--nav-progress, 0));
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: calc(20px - 3px * var(--nav-progress, 0));
  letter-spacing: calc(0.08em - 0.01em * var(--nav-progress, 0));
  color: var(--color-white);
  flex-shrink: 0;
}

.nav__logo-icon {
  width: calc(36px - 6px * var(--nav-progress, 0));
  height: calc(36px - 6px * var(--nav-progress, 0));
  object-fit: contain;
}

.footer__logo {
  display: inline-block;
}

.footer__logo img {
  max-width: 220px;
  height: auto;
}

.nav__link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width var(--duration-hover) var(--ease-out),
    left var(--duration-hover) var(--ease-out);
}

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

.nav__link:hover::after {
  width: 100%;
  left: 0;
}

.nav__actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
}

.nav__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-white);
  transition: transform var(--duration-hover) var(--ease-out);
}

@media (max-width: 1100px) {
  .nav__inner {
    display: flex;
    justify-content: space-between;
  }

  .nav__links {
    display: none;
  }

  .nav__toggle {
    display: flex;
  }

  .nav__menu-open .nav__links {
    display: flex;
    flex-direction: column;
    position: fixed;
    inset: 0;
    top: var(--nav-height-current, var(--nav-height));
    background: rgba(11, 17, 32, 0.97);
    backdrop-filter: blur(var(--blur-nav));
    padding: var(--space-8) var(--space-7);
    align-items: flex-start;
    gap: var(--space-5);
  }

  .nav__menu-open .nav__link {
    font-size: 20px;
  }
}

@media (max-width: 640px) {
  .nav__inner {
    width: var(--container-width);
  }

  .nav__actions .btn {
    display: none;
  }
}

/* Trust Chips */
.trust-chips {
  display: flex;
  flex-direction: row;
  flex-wrap: nowrap;
  align-items: center;
  gap: var(--space-3);
}

@media (max-width: 900px) {
  .trust-chips {
    flex-wrap: wrap;
  }
}

.trust-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-pill);
  backdrop-filter: blur(var(--blur-glass));
  font-size: 13px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.9);
  white-space: nowrap;
  flex-shrink: 0;
}

.trust-chip__icon {
  color: var(--color-success);
  flex-shrink: 0;
}

/* Cards */
.card-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
  margin-top: auto;
  transition: gap var(--duration-hover) var(--ease-out);
}

.card-link:hover {
  gap: var(--space-3);
}

.card-link--light {
  color: var(--color-secondary);
}

/* Scroll to top */
.scroll-top {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--gradient-primary);
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-glow);
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px);
  transition: opacity var(--duration-hover) var(--ease-out),
    visibility var(--duration-hover) var(--ease-out),
    transform var(--duration-hover) var(--ease-out);
  z-index: var(--z-nav);
}

.scroll-top--visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.scroll-top:hover {
  transform: translateY(-2px);
}

/* Reveal animations */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--duration-reveal) var(--ease-out),
    transform var(--duration-reveal) var(--ease-out);
}

.reveal--visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-stagger > * {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--duration-reveal) var(--ease-out),
    transform var(--duration-reveal) var(--ease-out);
}

.reveal-stagger.reveal--visible > * {
  opacity: 1;
  transform: translateY(0);
}

.reveal-stagger.reveal--visible > *:nth-child(1) { transition-delay: 0ms; }
.reveal-stagger.reveal--visible > *:nth-child(2) { transition-delay: 80ms; }
.reveal-stagger.reveal--visible > *:nth-child(3) { transition-delay: 160ms; }
.reveal-stagger.reveal--visible > *:nth-child(4) { transition-delay: 240ms; }
.reveal-stagger.reveal--visible > *:nth-child(5) { transition-delay: 320ms; }
.reveal-stagger.reveal--visible > *:nth-child(6) { transition-delay: 400ms; }
.reveal-stagger.reveal--visible > *:nth-child(7) { transition-delay: 480ms; }
.reveal-stagger.reveal--visible > *:nth-child(8) { transition-delay: 560ms; }
.reveal-stagger.reveal--visible > *:nth-child(9) { transition-delay: 640ms; }
.reveal-stagger.reveal--visible > *:nth-child(10) { transition-delay: 720ms; }
.reveal-stagger.reveal--visible > *:nth-child(11) { transition-delay: 800ms; }
.reveal-stagger.reveal--visible > *:nth-child(12) { transition-delay: 880ms; }