/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-weight: var(--font-weight-semibold);
  border-radius: var(--radius-full);
  transition: background var(--transition-base), transform var(--transition-fast), box-shadow var(--transition-base);
  cursor: pointer;
  white-space: nowrap;
  border: 2px solid transparent;
  line-height: 1;
}

.btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn:active { transform: translateY(0); }

.btn--sm  { padding: 0.5rem 1.25rem; font-size: var(--font-size-sm); }
.btn--md  { padding: 0.625rem 1.5rem; font-size: var(--font-size-base); }
.btn--lg  { padding: 0.875rem 2rem; font-size: var(--font-size-lg); }

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

.btn--white {
  background: var(--color-white);
  color: var(--color-primary);
}
.btn--white:hover { background: var(--color-gray-100); }

.btn--outline-white {
  background: transparent;
  color: var(--color-white);
  border-color: rgba(255, 255, 255, 0.5);
}
.btn--outline-white:hover { background: rgba(255, 255, 255, 0.15); border-color: var(--color-white); }

.btn__icon {
  width: 1.25em;
  height: 1.25em;
  flex-shrink: 0;
}

.btn__subtitle {
  display: block;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-normal);
  opacity: 0.7;
  margin-top: 2px;
}

/* ===== Navbar ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: box-shadow var(--transition-base), border-color var(--transition-base);
}

.navbar--scrolled {
  box-shadow: var(--shadow-md);
  border-bottom-color: var(--color-gray-200);
}

.navbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
}

.navbar__logo {
  display: flex;
  align-items: center;
}

.navbar__logo img {
  height: 33px;
  width: auto;
}

.navbar__nav {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.navbar__links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.navbar__link {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-gray-600);
  transition: color var(--transition-fast);
  padding: var(--space-2) 0;
}

.navbar__link:hover,
.navbar__link--active {
  color: var(--color-primary);
}

.navbar__toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  color: var(--color-gray-800);
}

/* ===== Feature Card ===== */
.feature-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-card);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.feature-card__icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 153, 255, 0.1);
  border-radius: var(--radius-md);
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}

.feature-card__icon svg {
  width: 24px;
  height: 24px;
}

.feature-card__title {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-heading);
  margin-bottom: var(--space-2);
}

.feature-card__desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  line-height: var(--line-height-relaxed);
}

/* ===== Accordion ===== */
.accordion {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.accordion__item {
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--transition-base);
}

.accordion__item[open] {
  border-color: var(--color-primary);
}

.accordion__trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: var(--space-5) var(--space-6);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-heading);
  cursor: pointer;
  list-style: none;
  user-select: none;
}

.accordion__trigger::-webkit-details-marker {
  display: none;
}

.accordion__trigger::marker {
  display: none;
  content: '';
}

.accordion__chevron {
  width: 20px;
  height: 20px;
  color: var(--color-gray-600);
  transition: transform var(--transition-base);
  flex-shrink: 0;
}

.accordion__item[open] .accordion__chevron {
  transform: rotate(180deg);
}

.accordion__content {
  padding: 0 var(--space-6) var(--space-5);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  line-height: var(--line-height-relaxed);
}

/* ===== Case Card ===== */
.case-card {
  position: relative;
  border-radius: var(--radius-2xl);
  overflow: hidden;
  min-height: 420px;
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: flex-end;
}

.case-card__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.85) 0%, rgba(0, 0, 0, 0.3) 50%, rgba(0, 0, 0, 0.15) 100%);
}

.case-card__body {
  position: relative;
  z-index: 1;
  padding: var(--space-8);
  color: var(--color-text-on-dark);
}

.case-card__logo {
  height: 36px;
  width: auto;
  margin-bottom: var(--space-3);
  opacity: 0.9;
}

.case-card__company {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  opacity: 0.8;
  margin-bottom: var(--space-2);
}

.case-card__title {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  margin-bottom: var(--space-3);
}

.case-card__desc {
  font-size: var(--font-size-sm);
  opacity: 0.8;
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--space-4);
  max-width: 480px;
}

.case-card__disclaimer {
  font-size: var(--font-size-xs);
  opacity: 0.5;
  margin-top: var(--space-4);
  font-style: italic;
}