/* Header */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--header-h);
  z-index: 100;
  overflow: visible;
  transition: background var(--transition), box-shadow var(--transition), backdrop-filter var(--transition);
}

.site-header.is-scrolled {
  background: var(--header-scrolled-bg);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-sm);
}

.site-header__inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.12em;
  color: var(--logo-color);
}

.site-logo__mark {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.site-nav a {
  font-size: 14px;
  font-weight: 500;
  color: var(--nav-link);
  transition: color 0.2s;
}

.site-nav a:hover { color: var(--nav-link-hover); }

.site-header__actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
  white-space: nowrap;
}

.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn--primary {
  background: var(--accent);
  color: var(--on-accent);
  box-shadow: 0 4px 14px rgba(0, 108, 179, 0.35);
}

.btn--primary:hover {
  background: var(--accent-hover);
  box-shadow: 0 6px 20px rgba(0, 108, 179, 0.4);
}

.btn--ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--neutral-200);
}

.btn--ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.btn--lg {
  padding: 14px 28px;
  font-size: 15px;
}

/* Badge */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
  background: var(--blue-25);
  color: var(--text-subtle);
  border: 1px solid rgba(0, 108, 179, 0.12);
}

/* Placeholder frames */
.placeholder {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  background:
    linear-gradient(135deg, var(--blue-0) 0%, var(--blue-25) 100%);
  border: 1px solid var(--neutral-200);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 280px;
}

.placeholder::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(
      -45deg,
      transparent,
      transparent 8px,
      rgba(0, 108, 179, 0.03) 8px,
      rgba(0, 108, 179, 0.03) 16px
    );
}

.placeholder__label {
  position: relative;
  z-index: 1;
  padding: 12px 20px;
  background: rgba(255, 255, 255, 0.9);
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 600;
  color: var(--text-subtle);
  box-shadow: var(--shadow-sm);
}

.placeholder--ui {
  aspect-ratio: 16 / 10;
  min-height: 360px;
}

.placeholder--diagram {
  aspect-ratio: 4 / 3;
  min-height: 420px;
}

/* Carousel */
.carousel {
  position: relative;
}

.carousel__viewport {
  overflow: hidden;
  border-radius: var(--radius-xl);
}

.carousel__track {
  display: flex;
  transition: transform 0.6s var(--ease-out);
}

.carousel__slide {
  flex: 0 0 100%;
  min-width: 0;
}

.carousel__controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-top: 20px;
}

.carousel__btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--neutral-200);
  background: var(--card-bg);
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: border-color 0.2s, color 0.2s;
  color: var(--text-heading);
}

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

.carousel__dots {
  display: flex;
  gap: 8px;
}

.carousel__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  border: none;
  background: var(--neutral-200);
  cursor: pointer;
  padding: 0;
  transition: transform 0.2s, background 0.2s;
}

.carousel__dot.is-active {
  background: var(--accent);
  transform: scale(1.25);
}

/* Chips */
.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.chip {
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
  font-family: var(--font-code);
  background: var(--surface-alt);
  color: var(--text-subtle);
  border: 1px solid var(--neutral-200);
}

/* Stats */
.stat-row {
  display: flex;
  gap: 48px;
  flex-wrap: wrap;
}

.stat__value {
  font-size: clamp(32px, 4vw, 48px);
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
}

.stat__label {
  font-size: 14px;
  color: var(--text-muted);
  margin-top: 6px;
}

/* Logo row */
.logo-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 32px 48px;
}

.logo-row__item {
  font-size: 15px;
  font-weight: 600;
  color: var(--neutral-500);
  letter-spacing: 0.02em;
  opacity: 0.7;
  transition: opacity 0.2s;
}

.logo-row__item:hover { opacity: 1; }

/* Form */
.demo-form {
  display: grid;
  gap: 16px;
}

.demo-form__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.demo-form input,
.demo-form textarea {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--neutral-200);
  border-radius: var(--radius-md);
  background: var(--card-bg);
  color: var(--text);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.demo-form input:focus,
.demo-form textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0, 108, 179, 0.12);
}

.demo-form textarea {
  min-height: 100px;
  resize: vertical;
  grid-column: 1 / -1;
}

/* Feature row */
.feature-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.feature-row:nth-child(even) .feature-row__media { order: 2; }
.feature-row:nth-child(even) .feature-row__text { order: 1; }

.feature-row__title {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-heading);
}

.feature-row__desc {
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-muted);
}

.features-stack {
  display: flex;
  flex-direction: column;
  gap: 80px;
}

/* Audience grid */
.audience-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.audience-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--neutral-200);
  background: var(--card-bg);
  transition: transform var(--transition), box-shadow var(--transition);
}

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

.audience-card__img {
  aspect-ratio: 16 / 10;
}

.audience-card__body {
  padding: 16px;
}

.audience-card__title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-heading);
}

/* Pricing */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.pricing-card {
  padding: 28px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--neutral-200);
  background: var(--card-bg);
  color: var(--card-text);
}

.pricing-card--featured {
  border-color: var(--accent);
  box-shadow: var(--shadow-product);
}

.pricing-card__name {
  font-size: 14px;
  font-weight: 600;
  color: var(--card-text-muted);
  margin-bottom: 8px;
}

.pricing-card__price {
  font-size: 32px;
  font-weight: 700;
  color: var(--card-text-heading);
  margin-bottom: 16px;
}

.pricing-card ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 24px;
}

.pricing-card li {
  font-size: 14px;
  color: var(--card-text-muted);
  padding-left: 16px;
  position: relative;
}

.pricing-card li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}

/* Materials */
.materials-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.material-link {
  padding: 14px 20px;
  border-radius: var(--radius-md);
  border: 1px solid var(--neutral-200);
  font-size: 14px;
  font-weight: 600;
  transition: border-color 0.2s, background 0.2s;
}

.material-link:hover {
  border-color: var(--accent);
  background: var(--blue-0);
}

/* GrafDoc flow */
.flow-steps {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 24px;
  align-items: center;
}

.flow-steps__arrow {
  font-size: 24px;
  color: var(--accent);
  opacity: 0.5;
}

/* Mobile nav toggle hidden on desktop */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

@media (max-width: 1024px) {
  .site-nav { display: none; }
  .nav-toggle { display: block; }

  .feature-row {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .feature-row:nth-child(even) .feature-row__media,
  .feature-row:nth-child(even) .feature-row__text { order: unset; }

  .audience-grid { grid-template-columns: repeat(2, 1fr); }
  .pricing-grid { grid-template-columns: 1fr; }
  .flow-steps { grid-template-columns: 1fr; }
  .flow-steps__arrow { display: none; }
}

@media (max-width: 640px) {
  .site-header__actions .btn--ghost { display: none; }
  .demo-form__grid { grid-template-columns: 1fr; }
  .audience-grid { grid-template-columns: 1fr; }
  .stat-row { gap: 24px; }
}