/* ==========================================================================
   Vigent LP — Dark UI Style (Linear / Stripe inspired)
   ========================================================================== */

/* --- CSS Variables --- */
:root {
  /* Background */
  --bg-base: #0a0a0b;
  --bg-surface: #111113;
  --bg-elevated: #1a1a1d;
  --bg-card: #141416;

  /* Text hierarchy (WCAG AA compliant on --bg-base) */
  --text-primary: #f5f5f5;
  --text-secondary: #b8b8b8;
  --text-tertiary: #909090;
  --text-muted: #686868;

  /* Borders */
  --border-subtle: #1e1e22;
  --border-default: #2a2a2e;
  --border-strong: #3a3a3e;

  /* Accent */
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --accent-glow: rgba(59, 130, 246, 0.15);
  --accent-soft: rgba(59, 130, 246, 0.08);

  /* Spacing */
  --space-xs: 8px;
  --space-sm: 16px;
  --space-md: 24px;
  --space-lg: 32px;
  --space-xl: 48px;
  --space-2xl: 64px;
  --space-3xl: 96px;
  --space-4xl: 128px;
  --space-section: 140px;

  /* Typography */
  --font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-size-xs: 0.8125rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --font-size-4xl: 2.5rem;
  --font-size-hero: 3.25rem;

  /* Layout */
  --container-max: 1200px;
  --text-max: 680px;

  /* Misc */
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: 400;
  line-height: 1.7;
  color: var(--text-secondary);
  background-color: var(--bg-base);
  overflow-x: hidden;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

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

/* --- Container --- */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

/* --- Dot Grid Background Utility --- */
.dot-grid {
  position: relative;
}

.dot-grid::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, var(--text-muted) 0.5px, transparent 0.5px);
  background-size: 24px 24px;
  opacity: 0.12;
  pointer-events: none;
  z-index: 0;
}

.dot-grid > * {
  position: relative;
  z-index: 1;
}

/* --- Section Base --- */
.section {
  padding: var(--space-section) 0;
}

.section-label {
  font-size: var(--font-size-xs);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--space-sm);
}

.section-heading {
  font-size: var(--font-size-3xl);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  line-height: 1.25;
  margin-bottom: var(--space-md);
}

.section-subheading {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  max-width: var(--text-max);
  line-height: 1.7;
}

/* ==========================================================================
   SECTION 1: Hero
   ========================================================================== */
.hero {
  position: relative;
  min-height: 90vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding: var(--space-4xl) 0 var(--space-3xl);
}

/* Radial glow */
.hero::before {
  content: "";
  position: absolute;
  top: -20%;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 900px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.14) 0%, rgba(59, 130, 246, 0.04) 40%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

/* Secondary glow */
.hero::after {
  content: "";
  position: absolute;
  bottom: -10%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.07) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.hero .container {
  position: relative;
  z-index: 1;
}

.hero-content {
  max-width: 720px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 6px 14px;
  border: 1px solid var(--border-default);
  border-radius: 100px;
  font-size: var(--font-size-xs);
  color: var(--text-secondary);
  margin-bottom: var(--space-lg);
  background: var(--accent-soft);
}

.hero-badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero h1 {
  font-size: var(--font-size-hero);
  font-weight: 600;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  line-height: 1.15;
  margin-bottom: var(--space-md);
}

.hero-description {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  line-height: 1.8;
  max-width: 600px;
  margin-bottom: var(--space-xl);
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

/* --- Buttons --- */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 16px 32px;
  background: var(--accent);
  color: #fff;
  font-size: var(--font-size-sm);
  font-weight: 600;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  letter-spacing: -0.01em;
}

.btn-primary:hover {
  background: var(--accent-hover);
  box-shadow: 0 0 30px rgba(59, 130, 246, 0.25);
  transform: translateY(-1px);
  color: #fff;
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 16px 32px;
  background: transparent;
  color: var(--text-primary);
  font-size: var(--font-size-sm);
  font-weight: 600;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  letter-spacing: -0.01em;
}

.btn-ghost:hover {
  border-color: var(--border-strong);
  color: var(--text-primary);
  background: var(--bg-elevated);
}

.btn-arrow {
  transition: transform var(--transition-fast);
}

.btn-primary:hover .btn-arrow,
.btn-ghost:hover .btn-arrow {
  transform: translateX(3px);
}

/* Hero visual mockup */
.hero-visual {
  margin-top: var(--space-3xl);
  position: relative;
}

.mockup-container {
  position: relative;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  padding: 2px;
}

.mockup-header {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-subtle);
}

.mockup-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--border-default);
}

.mockup-body {
  padding: var(--space-md);
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: var(--space-sm);
  min-height: 280px;
}

.mockup-panel {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: var(--space-sm);
}

.mockup-panel-label {
  font-size: var(--font-size-xs);
  color: var(--text-tertiary);
  margin-bottom: var(--space-xs);
}

.mockup-url-bar {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  background: var(--bg-base);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  margin-bottom: var(--space-sm);
}

.mockup-url-text {
  font-size: var(--font-size-xs);
  color: var(--text-tertiary);
  font-family: "SF Mono", "Fira Code", monospace;
}

.mockup-scan-progress {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.mockup-progress-bar {
  height: 4px;
  background: var(--bg-base);
  border-radius: 2px;
  overflow: hidden;
}

.mockup-progress-fill {
  height: 100%;
  width: 72%;
  background: linear-gradient(90deg, var(--accent), rgba(59, 130, 246, 0.5));
  border-radius: 2px;
}

.mockup-findings {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.mockup-finding-row {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 6px 8px;
  background: var(--bg-base);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-xs);
}

.mockup-severity {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  flex-shrink: 0;
}

.mockup-severity.critical { background: #ef4444; }
.mockup-severity.medium { background: #f59e0b; }
.mockup-severity.low { background: #22c55e; }

.mockup-finding-text {
  color: var(--text-tertiary);
}

.mockup-score-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  padding-top: var(--space-md);
}

.mockup-score-ring {
  width: 80px;
  height: 80px;
}

.mockup-score-text {
  font-size: var(--font-size-2xl);
  font-weight: 600;
  color: var(--text-primary);
}

.mockup-score-label {
  font-size: var(--font-size-xs);
  color: var(--text-tertiary);
}

/* Glow beneath the mockup */
.mockup-glow {
  position: absolute;
  bottom: -40px;
  left: 50%;
  transform: translateX(-50%);
  width: 80%;
  height: 100px;
  background: radial-gradient(ellipse, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
  z-index: -1;
}

/* --- Section Divider --- */
.section-divider {
  height: 1px;
  background: linear-gradient(90deg, transparent 0%, var(--border-default) 30%, var(--accent) 50%, var(--border-default) 70%, transparent 100%);
  opacity: 0.4;
}

/* ==========================================================================
   SECTION 2: Problem
   ========================================================================== */
.problem {
  background: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.problem-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
  margin-top: var(--space-xl);
}

.problem-card {
  padding: var(--space-lg);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  transition: border-color var(--transition-base);
}

.problem-card:hover {
  border-color: var(--border-default);
}

.problem-icon {
  width: 40px;
  height: 40px;
  margin-bottom: var(--space-md);
  color: var(--accent);
}

.problem-card h3 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
}

.problem-card p {
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-sm);
}

.problem-stat {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  background: var(--accent-soft);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
  color: var(--accent);
  font-weight: 500;
  margin-top: var(--space-xs);
}

/* ==========================================================================
   SECTION 3: Solution
   ========================================================================== */
.solution {
  position: relative;
}

.solution-intro {
  max-width: var(--text-max);
  margin-bottom: var(--space-3xl);
}

.solution-features {
  display: grid;
  gap: var(--space-3xl);
}

.feature-item {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
  align-items: center;
}

.feature-item:nth-child(even) {
  direction: rtl;
}

.feature-item:nth-child(even) > * {
  direction: ltr;
}

.feature-number {
  font-size: var(--font-size-hero);
  font-weight: 700;
  color: var(--border-subtle);
  letter-spacing: -0.04em;
  line-height: 1;
  margin-bottom: var(--space-sm);
}

.feature-content h3 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
}

.feature-content p {
  color: var(--text-secondary);
  line-height: 1.7;
}

.feature-content p + p {
  margin-top: var(--space-sm);
}

.feature-visual {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  min-height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Feature visual: scan engines */
.engine-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  width: 100%;
}

.engine-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 12px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition-base);
}

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

.engine-icon {
  width: 32px;
  height: 32px;
  color: var(--accent);
  flex-shrink: 0;
}

.engine-name {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--text-primary);
}

.engine-desc {
  font-size: var(--font-size-xs);
  color: var(--text-tertiary);
}

/* Feature visual: AI triage */
.triage-demo {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.triage-input, .triage-output {
  padding: 12px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-xs);
  font-family: "SF Mono", "Fira Code", monospace;
}

.triage-label {
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  margin-bottom: 4px;
}

.triage-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
}

.triage-input .finding-raw {
  color: var(--text-tertiary);
  text-decoration: line-through;
  opacity: 0.6;
}

.triage-output .finding-verified {
  color: var(--accent);
}

/* Feature visual: report */
.report-preview {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.report-line {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 8px 12px;
  background: var(--bg-card);
  border-radius: var(--radius-sm);
}

.report-line-label {
  font-size: var(--font-size-xs);
  color: var(--text-tertiary);
  min-width: 80px;
}

.report-line-value {
  font-size: var(--font-size-xs);
  color: var(--text-secondary);
}

/* Feature visual: IPA checklist */
.checklist-preview {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.checklist-item {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 8px 12px;
  background: var(--bg-card);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-xs);
  color: var(--text-secondary);
}

.check-icon {
  width: 16px;
  height: 16px;
  color: #22c55e;
  flex-shrink: 0;
}

.check-icon.warn {
  color: #f59e0b;
}

/* Solution CTA */
.solution-cta {
  margin-top: var(--space-3xl);
  text-align: center;
}

/* ==========================================================================
   SECTION 4: Comparison
   ========================================================================== */
.comparison {
  background: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.comparison-header {
  max-width: var(--text-max);
  margin-bottom: var(--space-xl);
}

.comparison-table-wrapper {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

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

.comparison-table thead th {
  padding: 14px 20px;
  text-align: left;
  font-weight: 500;
  color: var(--text-tertiary);
  border-bottom: 1px solid var(--border-subtle);
  white-space: nowrap;
}

.comparison-table thead th:first-child {
  color: var(--text-secondary);
}

.comparison-table thead th.highlight {
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
}

.comparison-table tbody td {
  padding: 14px 20px;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  vertical-align: middle;
}

.comparison-table tbody td.highlight {
  background: var(--accent-soft);
}

.comparison-table tbody tr:last-child td {
  border-bottom: none;
}

.comparison-table tbody td.highlight {
  border-left: none;
  border-right: none;
}

.table-check {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: rgba(34, 197, 94, 0.12);
  color: #22c55e;
}

.table-cross {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: rgba(239, 68, 68, 0.08);
  color: #ef4444;
  font-size: var(--font-size-xs);
}

.table-partial {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: rgba(245, 158, 11, 0.1);
  color: #f59e0b;
  font-size: var(--font-size-xs);
}

.table-note {
  font-size: var(--font-size-xs);
  color: var(--text-tertiary);
  margin-top: var(--space-sm);
}

/* ==========================================================================
   SECTION 5: Report Sample
   ========================================================================== */
.report-sample {
  position: relative;
}

.report-sample-header {
  max-width: var(--text-max);
  margin-bottom: var(--space-xl);
}

.report-screenshots {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

.report-screenshot {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--transition-base), transform var(--transition-base);
}

.report-screenshot:hover {
  border-color: var(--border-default);
  transform: translateY(-4px);
}

.report-screenshot-img {
  width: 100%;
  aspect-ratio: 3 / 4;
  background: var(--bg-card);
  display: flex;
  align-items: center;
  justify-content: center;
}

.report-screenshot-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
  color: var(--text-muted);
}

.report-screenshot-placeholder svg {
  width: 48px;
  height: 48px;
  opacity: 0.4;
}

.report-screenshot-placeholder span {
  font-size: var(--font-size-xs);
}

.report-screenshot-label {
  padding: 12px 16px;
  border-top: 1px solid var(--border-subtle);
}

.report-screenshot-label h4 {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.report-screenshot-label p {
  font-size: var(--font-size-xs);
  color: var(--text-tertiary);
  line-height: 1.5;
}

/* ==========================================================================
   SECTION 6: Use Cases
   ========================================================================== */
.use-cases {
  background: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.use-cases-header {
  text-align: center;
  max-width: var(--text-max);
  margin: 0 auto var(--space-3xl);
}

.use-case-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

.use-case-card {
  padding: var(--space-lg);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition-base), transform var(--transition-base);
  display: flex;
  flex-direction: column;
}

.use-case-card:hover {
  border-color: var(--border-default);
  transform: translateY(-2px);
}

.use-case-icon {
  width: 36px;
  height: 36px;
  color: var(--accent);
  margin-bottom: var(--space-md);
}

.use-case-card h3 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: var(--space-xs);
}

.use-case-tagline {
  font-size: var(--font-size-sm);
  color: var(--accent);
  font-weight: 500;
  margin-bottom: var(--space-sm);
  line-height: 1.5;
}

.use-case-card p:last-of-type {
  color: var(--text-secondary);
  line-height: 1.7;
  flex-grow: 1;
}

/* ==========================================================================
   SECTION 7: Final CTA
   ========================================================================== */
.final-cta {
  position: relative;
  text-align: center;
  padding: var(--space-4xl) 0;
}

.final-cta::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.12) 0%, rgba(59, 130, 246, 0.03) 40%, transparent 65%);
  pointer-events: none;
  z-index: 0;
}

.final-cta .container {
  position: relative;
  z-index: 1;
}

.final-cta h2 {
  font-size: var(--font-size-4xl);
  font-weight: 600;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-bottom: var(--space-md);
}

.final-cta p {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  max-width: 500px;
  margin: 0 auto var(--space-xl);
  line-height: 1.7;
}

.final-cta-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.site-footer {
  border-top: 1px solid var(--border-subtle);
  padding: var(--space-xl) 0;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: var(--space-md);
}

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

.footer-logo {
  font-size: var(--font-size-lg);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.footer-copy {
  font-size: var(--font-size-xs);
  color: var(--text-tertiary);
}

.footer-right {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: var(--space-xs);
}

.footer-citation {
  font-size: 11px;
  color: var(--text-muted);
  max-width: 400px;
  text-align: right;
  line-height: 1.5;
}

/* ==========================================================================
   HEADER (sticky nav)
   ========================================================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: var(--space-sm) 0;
  background: rgba(10, 10, 11, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header-logo {
  font-size: var(--font-size-lg);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  text-decoration: none;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.header-nav a {
  font-size: var(--font-size-sm);
  color: var(--text-tertiary);
  transition: color var(--transition-fast);
  text-decoration: none;
}

.header-nav a:hover {
  color: var(--text-primary);
}

.header-cta {
  padding: 8px 18px !important;
  font-size: var(--font-size-xs) !important;
  color: var(--text-primary) !important;
  border-color: var(--border-strong) !important;
}

/* ==========================================================================
   Scroll Animations
   ========================================================================== */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ==========================================================================
   RESPONSIVE
   ========================================================================== */

/* Tablet */
@media (max-width: 1024px) {
  :root {
    --font-size-hero: 2.5rem;
    --font-size-4xl: 2rem;
    --font-size-3xl: 1.75rem;
    --space-section: 100px;
  }

  .feature-item {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .feature-item:nth-child(even) {
    direction: ltr;
  }

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

  .report-screenshots {
    grid-template-columns: 1fr 1fr;
  }

  .use-case-cards {
    grid-template-columns: 1fr;
    gap: var(--space-sm);
  }
}

/* Mobile */
@media (max-width: 640px) {
  :root {
    --font-size-hero: 2rem;
    --font-size-4xl: 1.75rem;
    --font-size-3xl: 1.5rem;
    --font-size-2xl: 1.25rem;
    --space-section: 80px;
    --space-4xl: 80px;
  }

  .container {
    padding: 0 var(--space-sm);
  }

  .hero {
    min-height: auto;
    padding-top: 120px;
    padding-bottom: var(--space-2xl);
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .btn-primary, .btn-ghost {
    justify-content: center;
    text-align: center;
  }

  .mockup-body {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .report-screenshots {
    grid-template-columns: 1fr;
  }

  .comparison-table {
    font-size: var(--font-size-xs);
  }

  .comparison-table thead th,
  .comparison-table tbody td {
    padding: 10px 12px;
  }

  .header-nav a:not(.header-cta):not(.btn-primary) {
    display: none;
  }

  .footer-content {
    flex-direction: column;
    align-items: flex-start;
  }

  .footer-right {
    align-items: flex-start;
  }

  .footer-citation {
    text-align: left;
  }

  .final-cta h2 {
    font-size: var(--font-size-3xl);
  }

  .final-cta-actions {
    flex-direction: column;
    align-items: stretch;
  }
}