/* ============================================================
   COMPONENTS.CSS — UI Components
   ТОВ «РЕБ-Л» Defense Tech
   ============================================================ */

/* ============================================================
   BUTTONS
   ============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: 600;
  line-height: 1;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-normal);
  position: relative;
  white-space: nowrap;
  border: 2px solid transparent;
  user-select: none;
  -webkit-user-select: none;
  /* P0: WCAG 2.5.5 min touch target 44×44px */
  min-height: 44px;
}

.btn:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

/* Primary */
.btn-primary {
  background-color: var(--color-accent);
  color: var(--color-bg);
  border-color: var(--color-accent);
}

.btn-primary:hover {
  background-color: var(--color-accent-dark);
  border-color: var(--color-accent-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(var(--color-accent-rgb), 0.3);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: none;
}

/* Ghost */
.btn-ghost {
  background-color: transparent;
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.btn-ghost:hover {
  background-color: var(--color-accent);
  color: var(--color-bg);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(var(--color-accent-rgb), 0.2);
}

.btn-ghost:active {
  transform: translateY(0);
}

/* Secondary / muted */
.btn-secondary {
  background-color: var(--color-card);
  color: var(--color-text);
  border-color: var(--color-border);
}

.btn-secondary:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  transform: translateY(-1px);
}

/* Small */
.btn-sm {
  padding: 0.5rem 1rem;
  font-size: var(--text-sm);
  gap: var(--space-1);
  /* P1: ensure min touch target for small buttons on mobile */
  min-height: 36px;
}

/* Large */
.btn-lg {
  padding: 1rem 2rem;
  font-size: var(--text-lg);
}

/* Icon button */
.btn-icon {
  padding: 0.625rem;
  /* P0: min touch target 44×44px */
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
}

/* Button group */
.btn-group {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
}

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

/* Narrow centered CTA block (used inside section containers) */
.cta-narrow {
  max-width: 680px;
  margin: 0 auto;
  text-align: center;
}

.cta-narrow h2 {
  margin-bottom: var(--space-4);
}

.cta-narrow p.lead {
  margin-bottom: var(--space-8);
}

/* Alert info — wide variant spans full row */
.alert-info--wide {
  margin-top: var(--space-10);
  max-width: 100%;
}

/* ============================================================
   NAVIGATION
   ============================================================ */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  background-color: rgba(var(--color-bg-rgb), 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
  /* P1: GPU layer hint for backdrop-filter performance on mobile */
  will-change: background-color;
  transform: translateZ(0);
}

.nav.scrolled {
  background-color: rgba(var(--color-bg-rgb), 0.97);
  border-bottom-color: var(--color-border);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

/* Logo */
.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  flex-shrink: 0;
}

.nav-logo-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-bg);
  flex-shrink: 0;
}

.nav-logo-text {
  font-weight: 700;
  font-size: var(--text-base);
  color: var(--color-text);
  letter-spacing: -0.01em;
}

.nav-logo-dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  background-color: var(--color-accent);
  border-radius: 50%;
  margin-left: 2px;
  vertical-align: super;
  animation: pulse-glow 2s infinite;
}

/* Desktop links */
.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.nav-link {
  padding: var(--space-2) var(--space-3);
  color: var(--color-muted);
  font-size: var(--text-sm);
  font-weight: 500;
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: color var(--transition-fast), background-color var(--transition-fast);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: var(--space-3);
  right: var(--space-3);
  height: 2px;
  background: var(--color-accent);
  border-radius: 1px;
  transform: scaleX(0);
  transition: transform var(--transition-normal);
}

.nav-link:hover {
  color: var(--color-text);
  background-color: rgba(var(--color-overlay-rgb), 0.04);
}

.nav-link:hover::after {
  transform: scaleX(1);
}

.nav-link.active {
  color: var(--color-accent);
}

.nav-link.active::after {
  transform: scaleX(1);
}

/* Nav CTA */
.nav-cta {
  margin-left: var(--space-4);
}

/* Mobile toggle */
.nav-mobile-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  /* P0: min touch target 44×44px */
  width: 44px;
  height: 44px;
  min-width: 44px;
  min-height: 44px;
  gap: 6px;
  cursor: pointer;
  background: none;
  border: none;
  padding: var(--space-2);
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast);
}

.nav-mobile-toggle:hover {
  background-color: rgba(var(--color-overlay-rgb), 0.05);
}

.nav-mobile-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-text);
  border-radius: 1px;
  transition: all var(--transition-normal);
  transform-origin: center;
}

.nav-mobile-toggle.open span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.nav-mobile-toggle.open span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.nav-mobile-toggle.open span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* Mobile overlay nav */
.nav-mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 999;
  background-color: var(--color-bg);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-20) var(--space-6) var(--space-8);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
}

.nav-mobile-menu.open {
  display: flex;
  opacity: 1;
  pointer-events: all;
}

.nav-mobile-link {
  font-size: var(--text-2xl);
  font-weight: 600;
  color: var(--color-text);
  text-decoration: none;
  /* P0: touch target min 44px */
  padding: var(--space-3) var(--space-6);
  min-height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-lg);
  transition: color var(--transition-fast), background-color var(--transition-fast);
  width: 100%;
  text-align: center;
  max-width: 400px;
}

.nav-mobile-link:hover,
.nav-mobile-link.active {
  color: var(--color-accent);
  background-color: rgba(var(--color-accent-rgb), 0.06);
}

.nav-mobile-cta {
  margin-top: var(--space-4);
  width: 100%;
  max-width: 400px;
}

/* ============================================================
   CARDS
   ============================================================ */

/* Product Card */
.product-card {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
  text-decoration: none;
  color: inherit;
}

.product-card:hover {
  transform: translateY(-6px);
  border-color: rgba(var(--color-accent-rgb), 0.4);
  box-shadow: 0 8px 32px rgba(var(--color-accent-rgb), 0.12), 0 2px 8px rgba(0,0,0,0.4);
}

.product-card-image {
  aspect-ratio: 16/9;
  background: linear-gradient(135deg, var(--color-surface) 0%, var(--color-card) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
}

.product-card-image-placeholder {
  font-family: var(--font-mono);
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--color-accent);
  opacity: 0.3;
  letter-spacing: -0.02em;
}

.product-card-image::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    linear-gradient(rgba(var(--color-accent-rgb), 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(var(--color-accent-rgb), 0.03) 1px, transparent 1px);
  background-size: 24px 24px;
}

.product-card-body {
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  flex: 1;
}

.product-card-category {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.product-card-name {
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.01em;
}

.product-card-tagline {
  font-size: var(--text-sm);
  color: var(--color-muted);
  font-family: var(--font-mono);
}

.product-card-desc {
  font-size: var(--text-sm);
  color: var(--color-muted);
  line-height: 1.7;
  flex: 1;
}

.product-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: auto;
}

.product-card-footer {
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.product-card-link {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-accent);
  display: flex;
  align-items: center;
  gap: var(--space-1);
  transition: gap var(--transition-fast);
}

.product-card:hover .product-card-link {
  gap: var(--space-2);
}

/* Feature Card */
.feature-card {
  display: block;
  padding: var(--space-8);                            /* 32px — bumped from 24px */
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius-lg);
  color: inherit;
  text-decoration: none;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
}

/* On light theme cards need stronger elevation since white-on-near-white has no contrast */
[data-theme="light"] .feature-card {
  border-color: #C8D1DA;                              /* slightly darker than --color-border */
  border-left-color: var(--color-accent);
  box-shadow:
    0 1px 2px rgba(15, 20, 25, 0.04),
    0 4px 12px rgba(15, 20, 25, 0.06);
}

.feature-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-accent);
}

[data-theme="light"] .feature-card:hover {
  border-color: var(--color-accent);
  box-shadow:
    0 2px 4px rgba(var(--color-accent-rgb), 0.12),
    0 8px 24px rgba(15, 20, 25, 0.12);
}

.feature-card-link {
  display: inline-block;
  margin-top: var(--space-4);
  font-size: var(--text-sm);
  color: var(--color-accent);
  font-weight: 500;
  font-family: var(--font-mono, monospace);
  letter-spacing: 0.02em;
}

.feature-card:hover .feature-card-link {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.feature-card--placeholder {
  border-left-color: var(--color-border);
  opacity: 0.85;
}

.feature-card-icon--muted {
  background: var(--color-card);
  color: var(--color-muted);
  border: 1px dashed var(--color-border);
}

.feature-card-link--muted {
  color: var(--color-muted);
  font-style: italic;
}

.product-status-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

.status-pill {
  display: inline-block;
  padding: 3px 10px;
  font-size: 0.7rem;
  font-family: var(--font-mono, monospace);
  text-transform: lowercase;
  letter-spacing: 0.04em;
  border-radius: 999px;
  white-space: nowrap;
  flex-shrink: 0;
}

.status-pill--research {
  color: var(--color-accent);
  background: var(--color-accent-glow);
  border: 1px solid var(--color-accent);
}

.status-pill--soon {
  color: var(--color-muted);
  background: transparent;
  border: 1px dashed var(--color-border);
}

.feature-card-icon {
  width: 48px;
  height: 48px;
  background: var(--color-accent-glow);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-4);
  color: var(--color-accent);
}

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

.feature-card h3, .feature-card h4 {
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.feature-card p {
  font-size: var(--text-sm);
  line-height: 1.7;
}

/* Stat Card */
.stat-card {
  padding: var(--space-8);
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  text-align: center;
  transition: border-color var(--transition-normal);
}

.stat-card:hover {
  border-color: rgba(var(--color-accent-rgb), 0.3);
}

.stat-card-number {
  font-size: 3.5rem;
  font-weight: 800;
  font-family: var(--font-mono);
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: var(--space-2);
}

.stat-card-label {
  font-size: var(--text-sm);
  color: var(--color-muted);
  font-weight: 500;
}

/* Direction Card */
.direction-card {
  padding: var(--space-8) var(--space-6);
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.direction-card:hover {
  transform: translateY(-4px);
  border-color: rgba(var(--color-accent-rgb), 0.3);
  box-shadow: var(--shadow-md);
}

.direction-card-num {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: var(--space-4);
}

.direction-card h3, .direction-card h4 {
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.direction-card p {
  font-size: var(--text-sm);
}

/* Advantage item */
.advantage-item {
  display: flex;
  gap: var(--space-4);
  padding: var(--space-6);
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition-normal);
}

.advantage-item:hover {
  border-color: rgba(var(--color-accent-rgb), 0.25);
}

.advantage-icon {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  background: var(--color-accent-glow);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
}

.advantage-icon svg {
  width: 22px;
  height: 22px;
}

.advantage-content h4 {
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.advantage-content p {
  font-size: var(--text-sm);
}

/* Team role card */
.team-card {
  padding: var(--space-6);
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
}

.team-card-role {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-3);
}

.team-card h4 {
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.team-card p {
  font-size: var(--text-sm);
}

/* ============================================================
   FORMS
   ============================================================ */

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form-label {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text);
}

.form-label .required {
  color: var(--color-accent);
  margin-left: 2px;
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: 0.75rem var(--space-4);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.5;
  /* P0: min touch target height 48px for inputs */
  min-height: 48px;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  appearance: none;
  -webkit-appearance: none;
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-muted);
  opacity: 0.6;
}

.form-input:hover,
.form-textarea:hover,
.form-select:hover {
  border-color: var(--color-muted);
}

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

.form-input.error,
.form-textarea.error,
.form-select.error {
  border-color: var(--color-error);
}

.form-input.error:focus,
.form-textarea.error:focus {
  box-shadow: 0 0 0 3px rgba(248, 81, 73, 0.12);
}

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

.form-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%237D8590' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 40px;
  cursor: pointer;
}

.form-select option {
  background-color: var(--color-surface);
  color: var(--color-text);
}

/* Checkbox */
.form-checkbox-group {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  cursor: pointer;
}

.form-checkbox-group input[type="checkbox"] {
  display: none;
}

.form-checkbox-custom {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  margin-top: 2px;
}

.form-checkbox-group input[type="checkbox"]:checked + .form-checkbox-custom {
  background: var(--color-accent);
  border-color: var(--color-accent);
}

.form-checkbox-group input[type="checkbox"]:checked + .form-checkbox-custom::after {
  content: '';
  display: block;
  width: 5px;
  height: 9px;
  border: 2px solid var(--color-bg);
  border-top: none;
  border-left: none;
  transform: rotate(45deg) translateY(-1px);
}

.form-checkbox-label {
  font-size: var(--text-sm);
  color: var(--color-muted);
  line-height: 1.5;
  cursor: pointer;
}

/* Multi checkbox */
.form-checkboxes {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

/* Error / Success messages */
.form-error {
  font-size: var(--text-xs);
  color: var(--color-error);
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.form-success {
  padding: var(--space-4) var(--space-5);
  background: rgba(63, 185, 80, 0.08);
  border: 1px solid rgba(63, 185, 80, 0.3);
  border-radius: var(--radius-lg);
  color: var(--color-success);
  font-size: var(--text-sm);
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
}

.form-error-banner {
  padding: var(--space-4) var(--space-5);
  background: rgba(248, 81, 73, 0.08);
  border: 1px solid rgba(248, 81, 73, 0.3);
  border-radius: var(--radius-lg);
  color: var(--color-error);
  font-size: var(--text-sm);
}

/* Form grid */
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

.form-grid .form-group.full {
  grid-column: 1 / -1;
}

.form-note {
  font-size: var(--text-xs);
  color: var(--color-muted);
  opacity: 0.8;
  line-height: 1.6;
}

.form-submit-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-3);
}

/* ============================================================
   HERO COMPONENTS
   ============================================================ */

/* Main site hero */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  padding: calc(var(--nav-height) + var(--space-20)) 0 var(--space-20);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

/* Background looped video behind the grid overlay */
.hero-video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: -1;          /* behind .hero-bg pseudo-elements */
  opacity: 0.55;        /* dim so text stays readable in dark theme */
  transition: opacity var(--transition-slow);
}

[data-theme="light"] .hero-video {
  opacity: 0.22;        /* much fainter on light — video is a hint, not a backdrop */
  filter: brightness(1.10) contrast(0.95);
}

/* When a video is the backdrop, use .hero-bg's own background as a dim scrim
   so text remains readable. Active only on heroes that have .has-video-bg. */
.hero.has-video-bg .hero-bg {
  background:
    linear-gradient(90deg, rgba(0, 0, 0, 0.55) 0%, rgba(0, 0, 0, 0.10) 65%),
    linear-gradient(180deg, rgba(0, 0, 0, 0.30) 0%, rgba(0, 0, 0, 0.65) 100%);
}

[data-theme="light"] .hero.has-video-bg .hero-bg {
  background:
    linear-gradient(90deg, rgba(244, 246, 249, 0.85) 0%, rgba(244, 246, 249, 0.55) 65%),
    linear-gradient(180deg, rgba(244, 246, 249, 0.75) 0%, rgba(244, 246, 249, 0.95) 100%);
}

/* Text-shadow safety net for hero headlines on video backgrounds */
.hero.has-video-bg .hero-content h1,
.hero.has-video-bg .hero-content .hero-subtitle,
.hero.has-video-bg .hero-content .hero-badge {
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.45);
}

[data-theme="light"] .hero.has-video-bg .hero-content h1,
[data-theme="light"] .hero.has-video-bg .hero-content .hero-subtitle,
[data-theme="light"] .hero.has-video-bg .hero-content .hero-badge {
  text-shadow: none;
}

/* Respect users who prefer reduced motion — fall back to poster image */
@media (prefers-reduced-motion: reduce) {
  .hero-video {
    display: none;
  }
}

/* On very small screens, also drop the video to save data + render perf */
@media (max-width: 640px) {
  .hero-video {
    display: none;
  }
}

/* CSS-only animated grid background */
.hero-bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(var(--color-accent-rgb), 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(var(--color-accent-rgb), 0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black 0%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black 0%, transparent 80%);
}

.hero-bg::after {
  content: '';
  position: absolute;
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(var(--color-accent-rgb), 0.06) 0%, transparent 65%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 820px;
}

/* Hero badge */
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: rgba(var(--color-accent-rgb), 0.06);
  border: 1px solid rgba(var(--color-accent-rgb), 0.25);
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-6);
}

.hero-badge-dot {
  width: 6px;
  height: 6px;
  background: var(--color-accent);
  border-radius: 50%;
  animation: pulse-glow 1.5s infinite;
  flex-shrink: 0;
}

.hero h1 {
  margin-bottom: var(--space-6);
  color: var(--color-text);
}

.hero-subtitle {
  font-size: var(--text-xl);
  color: var(--color-muted);
  line-height: 1.7;
  max-width: 680px;
  margin-bottom: var(--space-10);
}

/* Section label */
.section-label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: var(--space-3);
}

/* ============================================================
   SPECS TABLE
   ============================================================ */

.specs-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
}

.specs-table tr {
  border-bottom: 1px solid var(--color-border);
}

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

.specs-table tr:hover td {
  background-color: rgba(var(--color-overlay-rgb), 0.02);
}

.specs-table td {
  padding: var(--space-3) var(--space-4);
  vertical-align: top;
  transition: background-color var(--transition-fast);
}

.specs-table td:first-child {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  white-space: nowrap;
  width: 40%;
}

.specs-table td:last-child {
  color: var(--color-text);
  font-weight: 500;
}

.specs-wrapper {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  /* P1: allow horizontal scroll on mobile for specs table */
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
}

/* ============================================================
   TAG
   ============================================================ */

.tag {
  display: inline-flex;
  align-items: center;
  padding: 3px var(--space-3);
  background: rgba(var(--color-accent-rgb), 0.06);
  border: 1px solid rgba(var(--color-accent-rgb), 0.15);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-accent);
  white-space: nowrap;
}

.tag--muted {
  background: rgba(125, 133, 144, 0.08);
  border-color: var(--color-border);
  color: var(--color-muted);
}

.tags-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

/* ============================================================
   ALERTS / INFO BOXES
   ============================================================ */

.alert-info {
  padding: var(--space-4) var(--space-5);
  background: rgba(var(--color-accent-rgb), 0.05);
  border-left: 3px solid var(--color-accent);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-size: var(--text-sm);
  color: var(--color-muted);
  line-height: 1.7;
}

.alert-info strong {
  color: var(--color-accent);
  display: block;
  margin-bottom: var(--space-1);
}

.alert-warning {
  padding: var(--space-4) var(--space-5);
  background: rgba(210, 153, 34, 0.08);
  border-left: 3px solid var(--color-warning);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-size: var(--text-sm);
  color: var(--color-muted);
  line-height: 1.7;
}

.alert-warning strong {
  color: var(--color-warning);
  display: block;
  margin-bottom: var(--space-1);
}

/* ============================================================
   SCROLL TO TOP
   ============================================================ */

.scroll-top {
  position: fixed;
  bottom: var(--space-8);
  right: var(--space-8);
  z-index: 900;
  width: 44px;
  height: 44px;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: all var(--transition-normal);
}

.scroll-top:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  transform: translateY(0);
}

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

.scroll-top svg {
  width: 18px;
  height: 18px;
}

/* ============================================================
   CTA SECTION
   ============================================================ */

.cta-section {
  background: linear-gradient(135deg, rgba(var(--color-accent-rgb), 0.06) 0%, rgba(var(--color-accent-rgb), 0.02) 100%);
  border: 1px solid rgba(var(--color-accent-rgb), 0.12);
  border-radius: var(--radius-xl);
  padding: var(--space-16) var(--space-12);
  text-align: center;
}

.cta-section h2 {
  margin-bottom: var(--space-4);
}

.cta-section p {
  font-size: var(--text-lg);
  margin-bottom: var(--space-8);
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

/* Quick CTA form */
.cta-form-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: start;
  text-align: left;
  margin-top: var(--space-12);
}

.cta-form-wrapper .cta-text {
  padding-top: var(--space-4);
}

/* ============================================================
   FOOTER
   ============================================================ */

.footer {
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: var(--space-12) 0 var(--space-8);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--space-12);
  align-items: start;
  margin-bottom: var(--space-8);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer-brand p {
  margin-top: var(--space-3);
  font-size: var(--text-sm);
  max-width: 320px;
}

.footer-nav {
  display: flex;
  gap: var(--space-12);
}

.footer-nav-col h5 {
  font-size: var(--text-sm);
  color: var(--color-text);
  margin-bottom: var(--space-4);
  font-weight: 600;
}

.footer-nav-col ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer-nav-col a {
  font-size: var(--text-sm);
  color: var(--color-muted);
  transition: color var(--transition-fast);
}

.footer-nav-col a:hover {
  color: var(--color-accent);
}

.footer-tag {
  display: inline-block;
  margin-left: var(--space-2);
  padding: 1px 6px;
  font-size: 0.7rem;
  font-family: var(--font-mono, monospace);
  color: var(--color-accent);
  border: 1px solid var(--color-accent);
  border-radius: 2px;
  text-transform: lowercase;
  letter-spacing: 0.02em;
  vertical-align: middle;
}

/* ============================================================
   IMAGE BAND — wide cinematic image strip between sections
   ============================================================ */
.image-band {
  position: relative;
  width: 100%;
  aspect-ratio: 21 / 9;
  max-height: 460px;
  overflow: hidden;
  background: var(--color-surface);
}

.image-band img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  opacity: 0.95;
  transition: opacity var(--transition-slow);
}

/* Subtle global gradient — keeps image visible, softens hot-spots */
.image-band::after {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(180deg, rgba(0,0,0,0.10) 0%, rgba(0,0,0,0.55) 100%),
    linear-gradient(90deg, rgba(0,0,0,0.40) 0%, rgba(0,0,0,0) 55%);
  pointer-events: none;
}

[data-theme="light"] .image-band::after {
  background:
    linear-gradient(180deg, rgba(244,246,249,0.10) 0%, rgba(244,246,249,0.55) 100%),
    linear-gradient(90deg, rgba(244,246,249,0.45) 0%, rgba(244,246,249,0) 55%);
}

.image-band-caption {
  position: absolute;
  left: var(--space-8);
  bottom: var(--space-8);
  z-index: 2;                                  /* above scrim */
  max-width: 600px;
  color: #FFFFFF;
  padding: var(--space-6) var(--space-8);
  background:
    /* Subtle accent tint on the left edge */
    linear-gradient(90deg, rgba(var(--color-accent-rgb), 0.18) 0%, rgba(var(--color-accent-rgb), 0) 25%),
    /* Solid dark frosted panel */
    rgba(8, 10, 14, 0.82);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-left: 4px solid var(--color-accent);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  box-shadow:
    0 -1px 0 rgba(var(--color-accent-rgb), 0.35) inset,         /* hairline glow at top edge */
    -8px 0 24px rgba(var(--color-accent-rgb), 0.10),            /* soft accent halo on the left */
    0 12px 32px rgba(0, 0, 0, 0.45);                            /* base lift shadow */
}

[data-theme="light"] .image-band-caption,
:root:not([data-theme]) .image-band-caption {
  color: #2868a7;
  background:
    linear-gradient(90deg, rgba(var(--color-accent-rgb), 0.12) 0%, rgba(var(--color-accent-rgb), 0) 25%),
    rgb(211 210 210 / 92%);
  box-shadow:
    -8px 0 24px rgba(var(--color-accent-rgb), 0.10),
    0 12px 32px rgba(0, 0, 0, 0.18);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) .image-band-caption {
    color: #FFFFFF;
    background:
      linear-gradient(90deg, rgba(var(--color-accent-rgb), 0.18) 0%, rgba(var(--color-accent-rgb), 0) 25%),
      rgba(8, 10, 14, 0.82);
    border-top: none;
    border-right: none;
    border-bottom: none;
    box-shadow:
      0 -1px 0 rgba(var(--color-accent-rgb), 0.35) inset,
      -8px 0 24px rgba(var(--color-accent-rgb), 0.10),
      0 12px 32px rgba(0, 0, 0, 0.45);
  }
}

.image-band-caption .section-label {
  color: var(--color-accent);
  font-weight: 600;
  letter-spacing: 0.10em;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.6);
}

[data-theme="light"] .image-band-caption .section-label {
  text-shadow: none;
}

.image-band-caption h3 {
  font-size: var(--text-4xl);                  /* up from 3xl */
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.15;
  margin: var(--space-3) 0 var(--space-3);
  color: inherit;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.55);
}

.image-band-caption p {
  color: inherit;
  opacity: 1;
  font-size: var(--text-lg);
  font-weight: 500;
  line-height: 1.5;
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.55);
}

[data-theme="light"] .image-band-caption h3,
[data-theme="light"] .image-band-caption p {
  text-shadow: none;
}

/* Hover effect when the band wraps an <a> link */
a > .image-band-caption,
a:has(> figcaption.image-band-caption) figcaption.image-band-caption {
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.image-band a:hover .image-band-caption {
  transform: translateY(-2px);
  box-shadow:
    0 -1px 0 rgba(var(--color-accent-rgb), 0.5) inset,
    -10px 0 32px rgba(var(--color-accent-rgb), 0.18),
    0 16px 40px rgba(0, 0, 0, 0.50);
}

@media (max-width: 768px) {
  .image-band {
    aspect-ratio: 4 / 3;
    max-height: none;
  }
  .image-band-caption {
    left: var(--space-3);
    right: var(--space-3);
    bottom: var(--space-3);
    padding: var(--space-4) var(--space-5);
    max-width: none;
  }
  .image-band-caption h3 { font-size: var(--text-2xl); }
  .image-band-caption p  { font-size: var(--text-base); }
}

/* Inline figure beside text in two-col layouts */
.col-image {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
}

.col-image img {
  width: 100%;
  height: auto;
  display: block;
}

/* ============================================================
   THEME TOGGLE
   ============================================================ */
.theme-toggle {
  width: 38px;
  height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-muted);
  cursor: pointer;
  transition: color var(--transition-fast),
              border-color var(--transition-fast),
              background var(--transition-fast);
  position: relative;
  flex-shrink: 0;
}

.theme-toggle:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
  background: rgba(var(--color-accent-rgb), 0.06);
}

.theme-toggle svg {
  width: 18px;
  height: 18px;
  position: absolute;
  transition: opacity var(--transition-fast), transform var(--transition-fast);
}

/* Default (dark theme): show moon, hide sun */
.theme-toggle .theme-toggle-sun  { opacity: 0; transform: rotate(-30deg) scale(0.8); }
.theme-toggle .theme-toggle-moon { opacity: 1; transform: rotate(0) scale(1); }

/* Light theme active: show sun, hide moon */
[data-theme="light"] .theme-toggle .theme-toggle-sun  { opacity: 1; transform: rotate(0) scale(1); }
[data-theme="light"] .theme-toggle .theme-toggle-moon { opacity: 0; transform: rotate(30deg) scale(0.8); }

/* No explicit theme + system prefers light → show sun */
@media (prefers-color-scheme: light) {
  :root:not([data-theme]) .theme-toggle .theme-toggle-sun  { opacity: 1; transform: rotate(0) scale(1); }
  :root:not([data-theme]) .theme-toggle .theme-toggle-moon { opacity: 0; transform: rotate(30deg) scale(0.8); }
}

/* Mobile-menu variant: full-width button row */
.nav-mobile-menu .theme-toggle {
  width: 100%;
  height: 44px;
  justify-content: flex-start;
  padding: 0 var(--space-3);
  gap: var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-text);
}

.nav-mobile-menu .theme-toggle::after {
  content: 'Перемкнути тему';
  margin-left: 28px;
  font-weight: 500;
}

.footer-meta {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
  padding: var(--space-6) 0;
  border-top: 1px solid var(--color-border);
  font-size: var(--text-xs);
  color: var(--color-muted);
  line-height: 1.6;
}

.footer-meta p {
  margin: 0 0 var(--space-2) 0;
}

.footer-meta p:last-child {
  margin-bottom: 0;
}

.footer-legal {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer-legal-line {
  color: var(--color-text);
}

.footer-compliance {
  font-style: italic;
}

.footer-brave1 a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.footer-brave1 a:hover {
  text-decoration: none;
}

@media (max-width: 768px) {
  .footer-meta {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border);
  font-size: var(--text-xs);
  color: var(--color-muted);
  flex-wrap: wrap;
  gap: var(--space-3);
}

.footer-bottom a {
  color: var(--color-muted);
  transition: color var(--transition-fast);
}

.footer-bottom a:hover {
  color: var(--color-accent);
}

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

/* ============================================================
   FAQ ACCORDION
   ============================================================ */

.faq-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.faq-item {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.faq-item.open {
  border-color: rgba(var(--color-accent-rgb), 0.3);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-5) var(--space-6);
  cursor: pointer;
  font-weight: 600;
  color: var(--color-text);
  font-size: var(--text-base);
  user-select: none;
  -webkit-user-select: none;
}

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

.faq-icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  color: var(--color-muted);
  transition: transform var(--transition-normal), color var(--transition-fast);
}

.faq-item.open .faq-icon {
  transform: rotate(45deg);
  color: var(--color-accent);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow);
}

.faq-item.open .faq-answer {
  max-height: 400px;
}

.faq-answer-inner {
  padding: 0 var(--space-6) var(--space-5);
  color: var(--color-muted);
  font-size: var(--text-sm);
  line-height: 1.8;
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-4);
}

/* ============================================================
   PROCESS / STEPS
   ============================================================ */

.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  position: relative;
}

.process-steps::before {
  content: '';
  position: absolute;
  top: 32px;
  left: 12.5%;
  right: 12.5%;
  height: 1px;
  background: linear-gradient(90deg, var(--color-accent), rgba(var(--color-accent-rgb), 0.2));
  z-index: 0;
}

.process-step {
  padding: var(--space-6);
  position: relative;
  z-index: 1;
  text-align: center;
}

.process-step-num {
  width: 48px;
  height: 48px;
  background: var(--color-card);
  border: 2px solid var(--color-accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-accent);
  margin: 0 auto var(--space-4);
}

.process-step h4 {
  color: var(--color-text);
  margin-bottom: var(--space-2);
  font-size: var(--text-base);
}

.process-step p {
  font-size: var(--text-sm);
}

/* ============================================================
   CONTACT INFO
   ============================================================ */

.contact-info-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  padding: var(--space-8);
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
}

.contact-info-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
}

.contact-info-icon {
  width: 40px;
  height: 40px;
  flex-shrink: 0;
  background: var(--color-accent-glow);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
}

.contact-info-icon svg {
  width: 20px;
  height: 20px;
}

.contact-info-label {
  font-size: var(--text-xs);
  font-family: var(--font-mono);
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-1);
}

.contact-info-value {
  font-size: var(--text-base);
  color: var(--color-text);
  font-weight: 500;
}

.contact-info-value a {
  transition: color var(--transition-fast);
}

.contact-info-value a:hover {
  color: var(--color-accent);
}

/* ============================================================
   PRODUCT HERO
   ============================================================ */

.product-hero {
  padding: calc(var(--nav-height) + var(--space-12)) 0 var(--space-12);
  border-bottom: 1px solid var(--color-border);
  background: linear-gradient(180deg, rgba(var(--color-accent-rgb), 0.03) 0%, transparent 100%);
}

.product-hero-inner {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: var(--space-16);
  align-items: center;
}

.product-hero-visual {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  aspect-ratio: 4/3;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.product-hero-visual::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    linear-gradient(rgba(var(--color-accent-rgb), 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(var(--color-accent-rgb), 0.04) 1px, transparent 1px);
  background-size: 32px 32px;
}

.product-hero-visual-label {
  font-family: var(--font-mono);
  font-size: 4rem;
  font-weight: 800;
  color: var(--color-accent);
  opacity: 0.15;
  position: relative;
  z-index: 1;
  letter-spacing: -0.04em;
}

/* ============================================================
   VALUES CARDS
   ============================================================ */

.value-card {
  padding: var(--space-8) var(--space-6);
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  text-align: center;
  transition: border-color var(--transition-normal), transform var(--transition-normal);
}

.value-card:hover {
  border-color: rgba(var(--color-accent-rgb), 0.3);
  transform: translateY(-4px);
}

.value-card-icon {
  font-size: 2.5rem;
  margin-bottom: var(--space-4);
  line-height: 1;
}

.value-card h4 {
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.value-card p {
  font-size: var(--text-sm);
}

/* ============================================================
   MISSION BOX
   ============================================================ */

.mission-box {
  padding: var(--space-10) var(--space-12);
  background: linear-gradient(135deg, rgba(var(--color-accent-rgb), 0.08) 0%, rgba(var(--color-accent-rgb), 0.02) 100%);
  border: 1px solid rgba(var(--color-accent-rgb), 0.2);
  border-radius: var(--radius-xl);
  text-align: center;
}

.mission-box blockquote {
  font-size: var(--text-2xl);
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.5;
  max-width: 680px;
  margin: 0 auto;
  position: relative;
}

.mission-box blockquote::before {
  content: '"';
  font-size: 6rem;
  color: var(--color-accent);
  opacity: 0.15;
  position: absolute;
  top: -2rem;
  left: -2rem;
  font-family: Georgia, serif;
  line-height: 1;
}

/* ============================================================
   SUBSCRIBE FORM
   ============================================================ */

.subscribe-form {
  display: flex;
  gap: var(--space-3);
  max-width: 480px;
}

.subscribe-form .form-input {
  flex: 1;
}

/* ============================================================
   TECHNOLOGY BLOCKS
   ============================================================ */

.tech-block {
  padding: var(--space-8) var(--space-6);
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  position: relative;
  overflow: hidden;
}

.tech-block::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent), transparent);
}

.tech-block h3 {
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

.tech-block p {
  font-size: var(--text-sm);
}

/* Method list */
.method-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.method-item {
  display: flex;
  gap: var(--space-4);
  padding: var(--space-5);
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.method-badge {
  flex-shrink: 0;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  height: fit-content;
  margin-top: 2px;
}

.method-badge--passive {
  background: rgba(125, 133, 144, 0.15);
  color: var(--color-muted);
  border: 1px solid var(--color-border);
}

.method-badge--active {
  background: rgba(var(--color-accent-rgb), 0.1);
  color: var(--color-accent);
  border: 1px solid rgba(var(--color-accent-rgb), 0.25);
}

.method-badge--adaptive {
  background: rgba(123, 97, 255, 0.1);
  color: #7B61FF;
  border: 1px solid rgba(123, 97, 255, 0.25);
}

.method-item h4 {
  color: var(--color-text);
  font-size: var(--text-base);
  margin-bottom: var(--space-1);
}

.method-item p {
  font-size: var(--text-sm);
}

/* ============================================================
   APPLICATION LIST
   ============================================================ */

.application-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.application-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  color: var(--color-text);
}

.application-item::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
  flex-shrink: 0;
}

/* Capability list */
.capability-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.capability-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-border);
  font-size: var(--text-sm);
  color: var(--color-muted);
}

.capability-item:last-child {
  border-bottom: none;
}

.capability-item::before {
  content: '✓';
  color: var(--color-accent);
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 1px;
}

/* ============================================================
   PRIVACY / LEGAL
   ============================================================ */

.legal-content {
  max-width: 800px;
}

.legal-content h2 {
  font-size: var(--text-2xl);
  margin-top: var(--space-10);
  margin-bottom: var(--space-4);
}

.legal-content h3 {
  font-size: var(--text-lg);
  margin-top: var(--space-8);
  margin-bottom: var(--space-3);
}

.legal-content p {
  margin-bottom: var(--space-4);
  font-size: var(--text-base);
}

.legal-content ul {
  list-style: disc;
  padding-left: var(--space-6);
  margin-bottom: var(--space-4);
  color: var(--color-muted);
}

.legal-content ul li {
  margin-bottom: var(--space-2);
  font-size: var(--text-base);
}

/* ============================================================
   RELATED PRODUCTS
   ============================================================ */

.related-card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  text-decoration: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  transition: border-color var(--transition-normal), transform var(--transition-normal);
}

.related-card:hover {
  border-color: rgba(var(--color-accent-rgb), 0.3);
  transform: translateY(-3px);
}

.related-card-name {
  font-weight: 700;
  color: var(--color-text);
  font-size: var(--text-lg);
}

.related-card-tagline {
  font-size: var(--text-xs);
  color: var(--color-muted);
  font-family: var(--font-mono);
}

.related-card-link {
  font-size: var(--text-sm);
  color: var(--color-accent);
  margin-top: auto;
  font-weight: 600;
}

/* ============================================================
   FILTER TABS
   ============================================================ */

.filter-tabs {
  display: flex;
  gap: var(--space-2);
  margin-bottom: var(--space-10);
  flex-wrap: wrap;
}

.filter-tab {
  padding: var(--space-2) var(--space-5);
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
  /* P0: min touch target */
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

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

.filter-tab.active {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-bg);
}

/* ============================================================
   RESPONSIVE — COMPONENTS
   ============================================================ */

@media (max-width: 1024px) {
  .product-hero-inner {
    grid-template-columns: 1fr;
  }

  .product-hero-visual {
    max-height: 300px;
    aspect-ratio: auto;
  }

  .process-steps {
    grid-template-columns: repeat(2, 1fr);
  }

  .process-steps::before {
    display: none;
  }

  .cta-form-wrapper {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .footer-nav {
    gap: var(--space-8);
  }
}

@media (max-width: 768px) {
  .nav-links,
  .nav-cta {
    display: none;
  }

  .nav-mobile-toggle {
    display: flex;
  }

  .cta-section {
    padding: var(--space-10) var(--space-6);
  }

  .process-steps {
    grid-template-columns: 1fr;
  }

  .form-grid {
    grid-template-columns: 1fr;
  }

  /* P1: Hero adjustments on mobile — CTA must be visible in first scroll */
  .hero {
    min-height: auto;
    padding: calc(var(--nav-height) + var(--space-12)) 0 var(--space-12);
  }

  .hero-subtitle {
    font-size: var(--text-base);
  }

  .footer-nav {
    flex-direction: column;
    gap: var(--space-6);
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .mission-box blockquote {
    font-size: var(--text-xl);
  }

  .mission-box blockquote::before {
    display: none;
  }

  .subscribe-form {
    flex-direction: column;
    max-width: 100%;
  }

  .specs-table td:first-child {
    white-space: normal;
  }
}

@media (max-width: 480px) {
  .btn-group {
    flex-direction: column;
    align-items: stretch;
  }

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

  .scroll-top {
    bottom: var(--space-4);
    right: var(--space-4);
  }
}

/* --- 375px Small Phone Breakpoint (P0) --- */
@media (max-width: 375px) {
  .nav-mobile-link {
    font-size: var(--text-xl);
  }

  /* P0: hero h1 must not exceed ~36px on 375px to avoid clipping */
  .hero h1 {
    font-size: 1.875rem;
  }

  .hero-subtitle {
    font-size: var(--text-sm);
  }

  /* Ensure filter tabs wrap properly */
  .filter-tabs {
    gap: var(--space-2);
  }

  .filter-tab {
    font-size: var(--text-xs);
    padding: var(--space-2) var(--space-3);
  }
}

/* --- 320px Smallest viewport (P0) --- */
@media (max-width: 320px) {
  .hero h1 {
    font-size: 1.625rem;
  }

  .btn {
    font-size: var(--text-sm);
    padding: 0.625rem 1rem;
  }

  .btn-lg {
    font-size: var(--text-base);
    padding: 0.75rem 1.25rem;
  }
}

/* ============================================================
   RESPONSIVE — Inline grid fixes (about, contacts, technologies)
   ============================================================ */

@media (max-width: 1024px) {
  /* About, Technologies, Contacts, RD inline grids */
  div[style*="grid-template-columns:1fr 1fr"],
  div[style*="grid-template-columns: 1fr 1fr"] {
    grid-template-columns: 1fr !important;
    gap: var(--space-10) !important;
  }
  div[style*="grid-template-columns:380px 1fr"],
  div[style*="grid-template-columns: 380px 1fr"] {
    grid-template-columns: 1fr !important;
    gap: var(--space-8) !important;
  }
  div[style*="grid-template-columns:1fr 480px"],
  div[style*="grid-template-columns: 1fr 480px"] {
    grid-template-columns: 1fr !important;
    gap: var(--space-8) !important;
  }
}