/* ==========================================================================
   Rouser Landing Page — IBM Carbon Design System
   Design source: DESIGN.md (IBM-design-analysis)
   ========================================================================== */

/* ---------- Google Fonts ---------- */
@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:wght@300;400;600&display=swap');

/* ---------- Design Tokens (from DESIGN.md) ---------- */
:root {
  /* Colors — Brand & Accent */
  --color-primary:          #0f62fe;
  --color-on-primary:       #ffffff;
  --color-blue-60:          #0043ce;
  --color-blue-80:          #002d9c;
  --color-blue-hover:       #0050e6;

  /* Colors — Surface */
  --color-canvas:           #ffffff;
  --color-surface-1:        #f4f4f4;
  --color-surface-2:        #e0e0e0;
  --color-hairline:         #e0e0e0;
  --color-hairline-strong:  #161616;

  /* Colors — Inverse (footer) */
  --color-inverse-canvas:     #161616;
  --color-inverse-surface-1:  #262626;
  --color-inverse-ink:        #ffffff;
  --color-inverse-ink-muted:  #c6c6c6;

  /* Colors — Text */
  --color-ink:        #161616;
  --color-ink-muted:  #525252;
  --color-ink-subtle: #757575;

  /* Colors — Semantic */
  --color-success: #24a148;
  --color-warning: #f1c21b;
  --color-error:   #da1e28;
  --color-info:    #0f62fe;

  /* Spacing (4px grid) */
  --space-xxs:     4px;
  --space-xs:      8px;
  --space-sm:      12px;
  --space-md:      16px;
  --space-lg:      24px;
  --space-xl:      32px;
  --space-xxl:     48px;
  --space-section: 96px;

  /* Border Radius — 0px is the brand */
  --radius-none: 0px;
  --radius-xs:   2px;
  --radius-sm:   4px;

  /* Typography */
  --font-family: 'IBM Plex Sans', 'Helvetica Neue', Arial, sans-serif;
  --font-mono:   'IBM Plex Mono', ui-monospace, 'SF Mono', Monaco, Consolas, monospace;

  /* Max widths */
  --max-grid:    1584px;
  --max-content: 1312px;
}

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

/* ---------- Base ---------- */
html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-weight: 400;
  font-size: 16px;
  line-height: 1.50;
  letter-spacing: 0.16px;
  color: var(--color-ink);
  background-color: var(--color-canvas);
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.15s ease;
}

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

a:focus-visible, button:focus-visible, .btn:focus-visible, summary:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* ---------- Typography Tokens ---------- */
.type-display-xl {
  font-family: var(--font-family);
  font-size: 76px;
  font-weight: 300;
  line-height: 1.17;
  letter-spacing: -0.5px;
}

.type-display-lg {
  font-family: var(--font-family);
  font-size: 60px;
  font-weight: 300;
  line-height: 1.17;
  letter-spacing: -0.4px;
}

.type-display-md {
  font-family: var(--font-family);
  font-size: 42px;
  font-weight: 300;
  line-height: 1.20;
  letter-spacing: 0;
}

.type-headline {
  font-family: var(--font-family);
  font-size: 32px;
  font-weight: 400;
  line-height: 1.25;
  letter-spacing: 0;
}

.type-card-title {
  font-family: var(--font-family);
  font-size: 24px;
  font-weight: 400;
  line-height: 1.33;
  letter-spacing: 0;
}

.type-subhead {
  font-family: var(--font-family);
  font-size: 20px;
  font-weight: 400;
  line-height: 1.40;
  letter-spacing: 0;
}

.type-body-lg {
  font-size: 18px;
  font-weight: 400;
  line-height: 1.50;
  letter-spacing: 0;
}

.type-body {
  font-size: 16px;
  font-weight: 400;
  line-height: 1.50;
  letter-spacing: 0.16px;
}

.type-body-sm {
  font-size: 14px;
  font-weight: 400;
  line-height: 1.29;
  letter-spacing: 0.16px;
}

.type-body-emphasis {
  font-size: 14px;
  font-weight: 600;
  line-height: 1.29;
  letter-spacing: 0.16px;
}

.type-caption {
  font-size: 12px;
  font-weight: 400;
  line-height: 1.33;
  letter-spacing: 0.32px;
}

.type-eyebrow {
  font-size: 14px;
  font-weight: 400;
  line-height: 1.29;
  letter-spacing: 0.16px;
  color: var(--color-ink-muted);
}

/* ---------- Layout ---------- */
.container {
  max-width: var(--max-content);
  margin: 0 auto;
  padding-left: var(--space-xl);
  padding-right: var(--space-xl);
}

.section {
  padding-top: var(--space-section);
  padding-bottom: var(--space-section);
}

.section--surface {
  background-color: var(--color-surface-1);
}

/* ---------- Promo Bar (sticky top) ---------- */
.promo-bar {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-primary);
  color: var(--color-on-primary);
  padding: var(--space-sm) var(--space-xl);
  text-align: center;
  font-size: 14px;
  font-weight: 400;
  line-height: 1.29;
  letter-spacing: 0.16px;
}

.promo-bar__inner {
  max-width: var(--max-content);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.promo-bar__text {
  opacity: 0.95;
}

.promo-bar__text strong {
  font-weight: 600;
}

.promo-bar__cta {
  display: inline-flex;
  align-items: center;
  background-color: var(--color-on-primary);
  color: var(--color-primary);
  font-size: 14px;
  font-weight: 400;
  letter-spacing: 0.16px;
  padding: 12px 16px;
  border-radius: var(--radius-none);
  text-decoration: none;
  transition: background-color 0.15s ease;
  white-space: nowrap;
}

.promo-bar__cta:hover {
  background-color: #e8e8e8;
  color: var(--color-primary);
}

/* ---------- Top Nav ---------- */
.top-nav {
  background-color: var(--color-canvas);
  height: 48px;
  border-bottom: 1px solid var(--color-hairline);
  display: flex;
  align-items: center;
  padding: 0 var(--space-xl);
  position: sticky;
  top: 36px; /* below promo bar */
  z-index: 90;
}

.top-nav__inner {
  max-width: var(--max-content);
  margin: 0 auto;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.top-nav__brand {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  text-decoration: none;
  color: var(--color-ink);
}

.top-nav__logo {
  width: 24px;
  height: 24px;
  border-radius: 0px;
}

.top-nav__name {
  font-size: 14px;
  font-weight: 400;
  letter-spacing: 0.16px;
}

.top-nav__formerly {
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.32px;
  color: var(--color-ink-subtle);
  margin-left: var(--space-xxs);
}

.top-nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  list-style: none;
}

.top-nav__links a {
  font-size: 14px;
  font-weight: 400;
  letter-spacing: 0.16px;
  color: var(--color-ink-muted);
  text-decoration: none;
  transition: color 0.15s ease;
}

.top-nav__links a:hover {
  color: var(--color-ink);
}

/* ---------- Hero ---------- */
.hero {
  padding: 80px var(--space-xl) var(--space-section);
  text-align: center;
  background-color: var(--color-canvas);
}

.hero__inner {
  max-width: 800px;
  margin: 0 auto;
}

.hero__eyebrow {
  font-size: 14px;
  font-weight: 400;
  line-height: 1.29;
  letter-spacing: 0.16px;
  color: var(--color-ink-muted);
  margin-bottom: var(--space-md);
}

.hero__headline {
  font-family: var(--font-family);
  font-size: 76px;
  font-weight: 300;
  line-height: 1.17;
  letter-spacing: -0.5px;
  color: var(--color-ink);
  margin-bottom: var(--space-lg);
}

.hero__subheadline {
  font-size: 20px;
  font-weight: 400;
  line-height: 1.40;
  letter-spacing: 0;
  color: var(--color-ink-muted);
  max-width: 640px;
  margin: 0 auto var(--space-xl);
}

.hero__actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  flex-wrap: wrap;
  margin-bottom: var(--space-md);
}

.hero__microcopy {
  font-size: 14px;
  font-weight: 400;
  letter-spacing: 0.16px;
  color: var(--color-ink-subtle);
}

/* ---------- Buttons (Carbon) ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  font-family: var(--font-family);
  font-size: 14px;
  font-weight: 400;
  line-height: 1.29;
  letter-spacing: 0.16px;
  padding: 12px 16px;
  border: none;
  border-radius: var(--radius-none);
  cursor: pointer;
  text-decoration: none;
  transition: background-color 0.15s ease;
  min-height: 48px;
}

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

.btn--primary:hover {
  background-color: var(--color-blue-hover);
  color: var(--color-on-primary);
}

.btn--primary:active {
  background-color: var(--color-blue-80);
}

.btn--secondary {
  background-color: var(--color-ink);
  color: var(--color-inverse-ink);
}

.btn--secondary:hover {
  background-color: #393939;
  color: var(--color-inverse-ink);
}

.btn--tertiary {
  background-color: var(--color-canvas);
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}

.btn--tertiary:hover {
  background-color: #0f62fe0a;
  color: var(--color-primary);
}

.btn--ghost {
  background-color: transparent;
  color: var(--color-primary);
  padding: 12px 16px;
}

.btn--ghost:hover {
  background-color: #0f62fe0a;
}

.btn--ghost .btn__arrow {
  transition: transform 0.15s ease;
}

.btn--ghost:hover .btn__arrow {
  transform: translateX(3px);
}

/* ---------- Product Screenshot ---------- */
.product-screenshot {
  padding: 0 var(--space-xl) var(--space-section);
  text-align: center;
  background-color: var(--color-canvas);
}

.product-screenshot__img {
  max-width: 900px;
  margin: 0 auto;
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-none);
}

/* ---------- Social Proof / Origin ---------- */
.origin {
  background-color: var(--color-surface-1);
  padding: var(--space-xxl) var(--space-xl);
}

.origin__inner {
  max-width: var(--max-content);
  margin: 0 auto;
}

.origin__headline {
  font-size: 24px;
  font-weight: 400;
  line-height: 1.33;
  letter-spacing: 0;
  color: var(--color-ink);
  margin-bottom: var(--space-md);
}

.origin__body {
  font-size: 16px;
  font-weight: 400;
  line-height: 1.50;
  letter-spacing: 0.16px;
  color: var(--color-ink-muted);
  max-width: 680px;
}

.origin__tagline {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.16px;
  color: var(--color-ink);
  margin-top: var(--space-lg);
}

/* ---------- Problem Section ---------- */
.problem {
  padding: var(--space-section) var(--space-xl);
  background-color: var(--color-canvas);
}

.problem__inner {
  max-width: var(--max-content);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xxl);
  align-items: start;
}

.problem__headline {
  font-size: 42px;
  font-weight: 300;
  line-height: 1.20;
  letter-spacing: 0;
  color: var(--color-ink);
  margin-bottom: var(--space-lg);
}

.problem__body {
  font-size: 16px;
  line-height: 1.50;
  letter-spacing: 0.16px;
  color: var(--color-ink-muted);
  margin-bottom: var(--space-lg);
}

.problem__question {
  font-size: 20px;
  font-weight: 600;
  line-height: 1.40;
  color: var(--color-ink);
  margin-bottom: var(--space-lg);
}

.problem__list {
  list-style: none;
  padding: 0;
}

.problem__list li {
  font-size: 16px;
  line-height: 1.50;
  letter-spacing: 0.16px;
  color: var(--color-ink-muted);
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--color-hairline);
  padding-left: var(--space-lg);
  position: relative;
}

.problem__list li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--color-ink-subtle);
}

.problem__answer {
  font-size: 18px;
  font-weight: 400;
  line-height: 1.50;
  color: var(--color-primary);
  margin-top: var(--space-xl);
}

/* ---------- Solution Section ---------- */
.solution {
  background-color: var(--color-surface-1);
  padding: var(--space-section) var(--space-xl);
}

.solution__inner {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}

.solution__headline {
  font-size: 42px;
  font-weight: 300;
  line-height: 1.20;
  letter-spacing: 0;
  color: var(--color-ink);
  margin-bottom: var(--space-lg);
}

.solution__body {
  font-size: 18px;
  line-height: 1.50;
  color: var(--color-ink-muted);
  margin-bottom: var(--space-md);
}

.solution__note {
  font-size: 16px;
  line-height: 1.50;
  letter-spacing: 0.16px;
  color: var(--color-ink-subtle);
  font-style: italic;
}

/* ---------- Features ---------- */
.features {
  padding: var(--space-section) var(--space-xl);
  background-color: var(--color-canvas);
}

.features__inner {
  max-width: var(--max-content);
  margin: 0 auto;
}

.features__headline {
  font-size: 42px;
  font-weight: 300;
  line-height: 1.20;
  letter-spacing: 0;
  color: var(--color-ink);
  margin-bottom: var(--space-xxl);
}

.features-showcase {
  border: 1px solid var(--color-hairline);
  background-color: var(--color-surface-1);
}

.features-showcase__tablist {
  display: flex;
  overflow-x: auto;
  border-bottom: 1px solid var(--color-hairline);
  background-color: var(--color-canvas);
  -ms-overflow-style: none;
  scrollbar-width: none;
}

.features-showcase__tablist::-webkit-scrollbar {
  display: none;
}

.features-showcase__tablist button {
  background: none;
  border: none;
  padding: 16px var(--space-lg);
  font-family: var(--font-family);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-ink-muted);
  cursor: pointer;
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  transition: all 0.15s ease;
  min-height: 44px;
}

.features-showcase__tablist button:hover {
  color: var(--color-ink);
  background-color: var(--color-surface-1);
}

.features-showcase__tablist button[aria-selected="true"] {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.features-showcase__panels {
  background-color: var(--color-canvas);
  min-height: 320px;
}

.features-showcase__panel {
  display: flex;
  flex-direction: column;
  opacity: 0;
  transition: opacity 0.2s ease;
}

.features-showcase__panel.active {
  opacity: 1;
}

@media (prefers-reduced-motion: reduce) {
  .features-showcase__panel {
    transition: none;
  }
}

.features-showcase__panel[hidden] {
  display: none;
}

.features-showcase__copy {
  padding: var(--space-xl);
  flex: 1;
}

.features-showcase__title {
  font-size: 24px;
  font-weight: 400;
  line-height: 1.33;
  color: var(--color-ink);
  margin-bottom: var(--space-sm);
}

.features-showcase__body {
  font-size: 16px;
  line-height: 1.5;
  color: var(--color-ink-muted);
  margin-bottom: var(--space-md);
}

.features-showcase__context {
  font-size: 14px;
  color: var(--color-ink-subtle);
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-hairline);
}

.features-showcase__mockup {
  background-color: var(--color-surface-1);
  padding: var(--space-xxl);
  display: flex;
  align-items: center;
  justify-content: center;
  border-top: 1px solid var(--color-hairline);
  min-height: 240px;
}

/* Mockup UI components */
.mockup-ui {
  background: var(--color-canvas);
  border: 1px solid var(--color-hairline);
  box-shadow: 0 4px 12px rgba(0,0,0,0.05);
  width: 100%;
  max-width: 400px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  font-family: var(--font-mono);
  font-size: 13px;
}

.mockup-ui--center {
  background: transparent;
  border: none;
  box-shadow: none;
}

.mockup-ui__input {
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-hairline);
  display: flex;
  align-items: center;
  color: var(--color-ink);
}

.mockup-ui__cursor {
  width: 2px;
  height: 16px;
  background-color: var(--color-primary);
  margin-left: 2px;
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  50% { opacity: 0; }
}

.mockup-ui__results {
  padding: 8px 0;
}

.mockup-ui__result {
  padding: 8px 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--color-ink-muted);
}

.mockup-ui__result.active {
  background-color: var(--color-primary);
  color: var(--color-on-primary);
}

.mockup-ui__badge {
  font-size: 10px;
  text-transform: uppercase;
  padding: 2px 6px;
  background-color: var(--color-surface-2);
  border-radius: var(--radius-xs);
  color: var(--color-ink-muted);
}

.mockup-ui__result.active .mockup-ui__badge {
  background-color: rgba(255,255,255,0.2);
  color: var(--color-on-primary);
}

.mockup-ui--chat {
  padding: 16px;
  border-radius: var(--radius-sm);
}

.mockup-ui__chat-line {
  color: var(--color-ink);
  line-height: 1.5;
}

.mockup-ui__token {
  padding: 2px 4px;
  border-radius: var(--radius-xs);
  font-weight: 600;
}

.mockup-ui__token--agent {
  background-color: #e5f0ff;
  color: #0043ce;
}

.mockup-ui__token--command {
  background-color: #e0e0e0;
  color: var(--color-ink);
}

.mockup-ui--terminal {
  background-color: var(--color-inverse-canvas);
  color: var(--color-inverse-ink);
  padding: 16px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.15);
}

.mockup-ui__term-line {
  margin-bottom: 8px;
}

.mockup-ui__term-line:last-child {
  margin-bottom: 0;
}

.mockup-ui__prompt {
  color: var(--color-success);
  margin-right: 8px;
}

.mockup-ui__term-line--success {
  color: var(--color-success);
}

.mockup-ui__shortcut {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-family);
  font-size: 24px;
  color: var(--color-ink-muted);
}

.mockup-ui__shortcut kbd {
  display: inline-block;
  padding: 8px 16px;
  background-color: var(--color-canvas);
  border: 1px solid var(--color-hairline);
  border-bottom-width: 3px;
  border-radius: var(--radius-sm);
  color: var(--color-ink);
  font-family: var(--font-family);
  font-weight: 600;
  min-width: 48px;
  text-align: center;
}

@media (min-width: 768px) {
  .features-showcase__panel {
    flex-direction: row;
  }
  
  .features-showcase__copy {
    flex: 1;
    padding: var(--space-xxl);
    border-right: 1px solid var(--color-hairline);
  }
  
  .features-showcase__mockup {
    flex: 1;
    border-top: none;
  }
}

/* ---------- Power Features (showcase with screenshots) ---------- */
.power-features {
  background-color: var(--color-surface-1);
  padding: var(--space-section) var(--space-xl);
}

.power-features__inner {
  max-width: var(--max-content);
  margin: 0 auto;
}

.power-features__headline {
  font-size: 42px;
  font-weight: 300;
  line-height: 1.20;
  letter-spacing: 0;
  color: var(--color-ink);
  margin-bottom: var(--space-md);
}

.power-features__subheadline {
  font-size: 18px;
  font-weight: 400;
  line-height: 1.50;
  color: var(--color-ink-muted);
  max-width: 720px;
  margin-bottom: var(--space-xxl);
}

.power-feature {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xxl);
  align-items: center;
  padding: var(--space-xxl) 0;
  border-top: 1px solid var(--color-hairline);
}

.power-feature:last-child {
  padding-bottom: 0;
}

.power-feature--reverse .power-feature__content {
  order: 2;
}

.power-feature--reverse .power-feature__img-wrap {
  order: 1;
}

.power-feature__content {
  max-width: 520px;
}

.power-feature__number {
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.32px;
  color: var(--color-primary);
  margin-bottom: var(--space-md);
  text-transform: uppercase;
}

.power-feature__title {
  font-size: 24px;
  font-weight: 400;
  line-height: 1.33;
  letter-spacing: 0;
  color: var(--color-ink);
  margin-bottom: var(--space-sm);
}

.power-feature__body {
  font-size: 16px;
  line-height: 1.50;
  letter-spacing: 0.16px;
  color: var(--color-ink-muted);
  margin-bottom: var(--space-md);
}

.power-feature__context {
  font-size: 14px;
  font-weight: 400;
  letter-spacing: 0.16px;
  color: var(--color-ink-subtle);
  padding-top: var(--space-sm);
  border-top: 1px solid var(--color-hairline);
}

.power-feature__context strong {
  font-weight: 600;
  color: var(--color-ink-muted);
}

.power-feature__img-wrap {
  overflow: hidden;
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-none);
  background-color: var(--color-canvas);
}

.power-feature__img {
  width: 100%;
  height: auto;
  display: block;
  transition: transform 0.3s ease;
}

.power-feature:hover .power-feature__img {
  transform: scale(1.02);
}

/* ---------- Inline Code (power features & FAQ) ---------- */
.power-feature__body code,
.faq-item__answer code {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  background-color: var(--color-canvas);
  padding: 2px 6px;
  border-radius: var(--radius-none);
  color: var(--color-ink);
}

/* Inside FAQ (white bg), code needs the surface bg for contrast */
.faq-item__answer code {
  background-color: var(--color-surface-1);
}

/* ---------- Scroll Entrance Animation ---------- */
@keyframes power-feature-fade-in {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.power-feature {
  animation: power-feature-fade-in 0.6s ease both;
  animation-timeline: view();
  animation-range: entry 0% entry 30%;
}

/* ---------- How It Works ---------- */
.how-it-works {
  background-color: var(--color-surface-1);
  padding: var(--space-section) var(--space-xl);
}

.how-it-works__inner {
  max-width: var(--max-content);
  margin: 0 auto;
}

.how-it-works__headline {
  font-size: 42px;
  font-weight: 300;
  line-height: 1.20;
  letter-spacing: 0;
  color: var(--color-ink);
  margin-bottom: var(--space-xxl);
}

.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-xl);
}

.step {
  position: relative;
}

.step__number {
  font-size: 60px;
  font-weight: 300;
  line-height: 1.17;
  letter-spacing: -0.4px;
  color: var(--color-ink-muted);
  margin-bottom: var(--space-md);
}

.step__title {
  font-size: 20px;
  font-weight: 400;
  line-height: 1.40;
  letter-spacing: 0;
  color: var(--color-ink);
  margin-bottom: var(--space-xs);
}

.step__body {
  font-size: 14px;
  font-weight: 400;
  line-height: 1.29;
  letter-spacing: 0.16px;
  color: var(--color-ink-muted);
}

/* ---------- Use Cases ---------- */
.use-cases {
  padding: var(--space-section) var(--space-xl);
  background-color: var(--color-canvas);
}

.use-cases__inner {
  max-width: var(--max-content);
  margin: 0 auto;
}

.use-cases__headline {
  font-size: 42px;
  font-weight: 300;
  line-height: 1.20;
  letter-spacing: 0;
  color: var(--color-ink);
  margin-bottom: var(--space-xxl);
}

.use-cases__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background-color: var(--color-hairline);
}

.use-case {
  background-color: var(--color-canvas);
  padding: var(--space-xl);
}

.use-case__title {
  font-size: 20px;
  font-weight: 400;
  line-height: 1.40;
  letter-spacing: 0;
  color: var(--color-ink);
  margin-bottom: var(--space-xs);
}

.use-case__body {
  font-size: 14px;
  line-height: 1.29;
  letter-spacing: 0.16px;
  color: var(--color-ink-muted);
}

.use-case__command {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  background-color: var(--color-surface-1);
  padding: 2px 6px;
  border-radius: var(--radius-none);
  color: var(--color-ink);
}

/* ---------- Comparison / Differentiation ---------- */
.differentiation {
  background-color: var(--color-surface-1);
  padding: var(--space-section) var(--space-xl);
}

.differentiation__inner {
  max-width: var(--max-content);
  margin: 0 auto;
}

.differentiation__headline {
  font-size: 42px;
  font-weight: 300;
  line-height: 1.20;
  letter-spacing: 0;
  color: var(--color-ink);
  margin-bottom: var(--space-md);
}

.differentiation__lead {
  font-size: 18px;
  font-weight: 400;
  line-height: 1.50;
  color: var(--color-ink-muted);
  margin-bottom: var(--space-xxl);
  max-width: 600px;
}

.table-responsive {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  line-height: 1.29;
  letter-spacing: 0.16px;
}

.comparison-table thead th {
  text-align: left;
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 0.16px;
  padding: var(--space-md) var(--space-lg);
  border-bottom: 2px solid var(--color-ink);
  background-color: var(--color-surface-1);
  color: var(--color-ink);
}

.comparison-table thead th:last-child {
  color: var(--color-primary);
}

.comparison-table tbody td {
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--color-hairline);
  color: var(--color-ink-muted);
  background-color: var(--color-canvas);
  vertical-align: top;
}

.comparison-table tbody td:last-child {
  color: var(--color-ink);
  font-weight: 400;
}

/* ---------- Pricing ---------- */
.pricing {
  padding: var(--space-section) var(--space-xl);
  background-color: var(--color-canvas);
}

.pricing__inner {
  max-width: var(--max-content);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 400px;
  gap: var(--space-xxl);
  align-items: start;
}

.pricing__content {
  padding-top: var(--space-md);
}

.pricing__eyebrow {
  font-size: 14px;
  font-weight: 400;
  letter-spacing: 0.16px;
  color: var(--color-primary);
  margin-bottom: var(--space-md);
}

.pricing__headline {
  font-size: 42px;
  font-weight: 300;
  line-height: 1.20;
  letter-spacing: 0;
  color: var(--color-ink);
  margin-bottom: var(--space-lg);
}

.pricing__body {
  font-size: 16px;
  line-height: 1.50;
  letter-spacing: 0.16px;
  color: var(--color-ink-muted);
}

/* Pricing Card */
.pricing-card {
  background-color: var(--color-canvas);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-none);
  padding: var(--space-xl);
}

.pricing-card__label {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.16px;
  color: var(--color-primary);
  margin-bottom: var(--space-lg);
}

.pricing-card__price {
  display: flex;
  align-items: baseline;
  gap: var(--space-sm);
  margin-bottom: var(--space-xs);
}

.pricing-card__amount {
  font-size: 60px;
  font-weight: 300;
  line-height: 1.17;
  letter-spacing: -0.4px;
  color: var(--color-ink);
}

.pricing-card__original {
  font-size: 20px;
  font-weight: 400;
  color: var(--color-ink-subtle);
  text-decoration: line-through;
}

.pricing-card__note {
  font-size: 14px;
  letter-spacing: 0.16px;
  color: var(--color-ink-muted);
  margin-bottom: var(--space-lg);
}

.pricing-card__features {
  list-style: none;
  padding: 0;
  margin-bottom: var(--space-lg);
  border-top: 1px solid var(--color-hairline);
  padding-top: var(--space-lg);
}

.pricing-card__features li {
  font-size: 14px;
  line-height: 1.29;
  letter-spacing: 0.16px;
  color: var(--color-ink-muted);
  padding: var(--space-xs) 0;
  display: flex;
  align-items: flex-start;
  gap: var(--space-xs);
}

.pricing-card__features li::before {
  content: '✓';
  color: var(--color-primary);
  font-weight: 600;
  flex-shrink: 0;
}

.pricing-card__features code {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  background-color: var(--color-surface-1);
  padding: 1px 4px;
  border-radius: var(--radius-none);
  color: var(--color-ink);
}

.pricing-card__cta {
  width: 100%;
}

.pricing-card__deadline {
  font-size: 12px;
  letter-spacing: 0.32px;
  color: var(--color-ink-subtle);
  margin-top: var(--space-md);
  text-align: center;
}

/* ---------- Requirements ---------- */
.requirements {
  background-color: var(--color-surface-1);
  padding: var(--space-xxl) var(--space-xl);
}

.requirements__inner {
  max-width: var(--max-content);
  margin: 0 auto;
  display: flex;
  gap: var(--space-xxl);
  align-items: start;
}

.requirements__headline {
  font-size: 24px;
  font-weight: 400;
  line-height: 1.33;
  color: var(--color-ink);
  white-space: nowrap;
  flex-shrink: 0;
}

.requirements__list {
  list-style: none;
  padding: 0;
  display: flex;
  gap: var(--space-xl);
  flex-wrap: wrap;
}

.requirements__list li {
  font-size: 14px;
  line-height: 1.29;
  letter-spacing: 0.16px;
  color: var(--color-ink-muted);
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.requirements__list li::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 4px;
  background-color: var(--color-primary);
  border-radius: 0;
  flex-shrink: 0;
}

/* ---------- FAQ ---------- */
.faq {
  padding: var(--space-section) var(--space-xl);
  background-color: var(--color-canvas);
}

.faq__inner {
  max-width: 800px;
  margin: 0 auto;
}

.faq__headline {
  font-size: 42px;
  font-weight: 300;
  line-height: 1.20;
  letter-spacing: 0;
  color: var(--color-ink);
  margin-bottom: var(--space-xxl);
}

.faq-item {
  border-bottom: 1px solid var(--color-hairline);
}

.faq-item__question {
  font-size: 16px;
  font-weight: 400;
  line-height: 1.50;
  letter-spacing: 0.16px;
  color: var(--color-ink);
  padding: var(--space-lg) 0;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  background: none;
  border: none;
  font-family: var(--font-family);
  text-align: left;
}

.faq-item__question:hover {
  color: var(--color-primary);
}

.faq-item__icon {
  font-size: 20px;
  color: var(--color-ink-subtle);
  transition: transform 0.2s ease;
  flex-shrink: 0;
  margin-left: var(--space-md);
}

.faq-item[open] .faq-item__icon {
  transform: rotate(45deg);
}

.faq-item__answer {
  font-size: 14px;
  line-height: 1.50;
  letter-spacing: 0.16px;
  color: var(--color-ink-muted);
  padding: 0 0 var(--space-lg);
  max-width: 640px;
}

/* ---------- CTA Banner (full-width blue) ---------- */
.cta-banner {
  background-color: var(--color-primary);
  color: var(--color-on-primary);
  padding: var(--space-section) var(--space-xl);
  text-align: center;
}

.cta-banner__inner {
  max-width: 640px;
  margin: 0 auto;
}

.cta-banner__headline {
  font-size: 42px;
  font-weight: 300;
  line-height: 1.20;
  letter-spacing: 0;
  margin-bottom: var(--space-lg);
}

.cta-banner__body {
  font-size: 18px;
  font-weight: 400;
  line-height: 1.50;
  opacity: 0.85;
  margin-bottom: var(--space-xl);
}

.cta-banner__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-family);
  font-size: 14px;
  font-weight: 400;
  letter-spacing: 0.16px;
  padding: 14px 32px;
  background-color: var(--color-on-primary);
  color: var(--color-primary);
  border: none;
  border-radius: var(--radius-none);
  cursor: pointer;
  text-decoration: none;
  transition: background-color 0.15s ease;
  min-height: 48px;
}

.cta-banner__btn:hover {
  background-color: #e8e8e8;
  color: var(--color-primary);
}

.cta-banner__microcopy {
  font-size: 14px;
  opacity: 0.7;
  margin-top: var(--space-md);
}

/* ---------- Footer (inverse dark) ---------- */
.site-footer {
  background-color: var(--color-inverse-canvas);
  color: var(--color-inverse-ink-muted);
  padding: 64px var(--space-xl) var(--space-xl);
}

.site-footer__inner {
  max-width: var(--max-content);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr repeat(3, auto);
  gap: var(--space-xxl);
}

.site-footer__brand-col {}

.site-footer__name {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.16px;
  color: var(--color-inverse-ink);
  margin-bottom: var(--space-xs);
}

.site-footer__tagline {
  font-size: 14px;
  line-height: 1.29;
  letter-spacing: 0.16px;
  color: var(--color-inverse-ink-muted);
}

.site-footer__col-title {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.16px;
  color: var(--color-inverse-ink);
  margin-bottom: var(--space-md);
}

.site-footer__links {
  list-style: none;
  padding: 0;
}

.site-footer__links li {
  margin-bottom: var(--space-xs);
}

.site-footer__links a {
  font-size: 14px;
  line-height: 1.29;
  letter-spacing: 0.16px;
  color: var(--color-inverse-ink-muted);
  text-decoration: none;
  transition: color 0.15s ease;
}

.site-footer__links a:hover {
  color: var(--color-inverse-ink);
}

.site-footer__bottom {
  max-width: var(--max-content);
  margin: var(--space-xxl) auto 0;
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-inverse-surface-1);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.site-footer__copyright {
  font-size: 12px;
  letter-spacing: 0.32px;
  color: var(--color-inverse-ink-muted);
}

.site-footer__legal {
  font-size: 12px;
  letter-spacing: 0.32px;
  color: var(--color-ink-subtle);
  max-width: 600px;
}

/* ==========================================================================
   Gatekeeper and Checksum Mockups
   ========================================================================== */
/* Verify Page Layout */
.verify-page { max-width: 800px; margin: 0 auto; padding: 6rem 1rem 4rem; }
.verify-subtitle { font-size: 1.1rem; color: var(--color-ink-muted); margin-top: 1rem; }
.verify-section { margin-top: 3rem; margin-bottom: 3rem; }
.verify-section h2 { margin-bottom: 1.5rem; font-size: 24px; }
.verify-divider { border: 0; border-top: 1px solid var(--color-hairline); margin: 3rem 0; }
.verify-section-text { margin-bottom: 1.5rem; color: var(--color-ink-muted); }
.verify-alert { margin-top: 2rem; }

/* Verify Checksum Link */
.verify-checksum-link {
  display: inline-block;
  font-size: 14px;
  color: var(--color-ink-subtle);
  margin-top: var(--space-md);
  text-decoration: underline;
  text-underline-offset: 4px;
}
.verify-checksum-link:hover {
  color: var(--color-primary);
}
.verify-checksum-link--inverse {
  color: var(--color-inverse-ink-muted);
}
.verify-checksum-link--inverse:hover {
  color: var(--color-inverse-ink);
}

/* Gatekeeper Mockups */
.gatekeeper-step {
  display: flex;
  gap: var(--space-lg);
  margin-bottom: var(--space-lg);
  align-items: center;
}
.gatekeeper-step:last-child {
  margin-bottom: 0;
}

.gatekeeper-mockup {
  flex: 0 0 180px;
  background-color: var(--color-surface-1);
  border: 1px solid var(--color-hairline);
  height: 100px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.gatekeeper-text {
  flex: 1;
  font-size: 14px;
  color: var(--color-ink-muted);
}
.gatekeeper-text strong {
  display: block;
  font-size: 16px;
  color: var(--color-ink);
  margin-bottom: var(--space-xxs);
}

/* Mockup Elements */
.mockup-dmg {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}
.mockup-dmg__icon {
  width: 32px; height: 32px;
  display: flex; align-items: center; justify-content: center;
  font-weight: 600; color: white;
}
.mockup-dmg__icon--app { background-color: var(--color-ink); border-radius: 4px; }
.mockup-dmg__icon--folder { background-color: var(--color-primary); }
.mockup-dmg__arrow { color: var(--color-ink-subtle); font-size: 20px; }

.mockup-context-menu {
  background: var(--color-canvas);
  border: 1px solid var(--color-hairline);
  box-shadow: 0 4px 8px rgba(0,0,0,0.1);
  border-radius: 4px;
  width: 120px;
  font-size: 10px;
}
.mockup-context-menu__item {
  padding: 4px 8px;
  color: var(--color-ink);
}
.mockup-context-menu__item--active {
  background-color: var(--color-primary);
  color: white;
}

.mockup-alert {
  background: var(--color-canvas);
  border: 1px solid var(--color-hairline);
  border-radius: 6px;
  width: 140px;
  text-align: center;
  box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}
.mockup-alert__title {
  font-size: 10px;
  padding: 8px;
  border-bottom: 1px solid var(--color-hairline);
}
.mockup-alert__buttons {
  display: flex;
}
.mockup-alert__btn {
  flex: 1;
  font-size: 10px;
  padding: 6px 0;
  color: var(--color-primary);
}
.mockup-alert__btn:first-child {
  border-right: 1px solid var(--color-hairline);
}
.mockup-alert__btn--primary {
  font-weight: 600;
}

/* Checksum Modal Styles */
.modal__intro {
  margin-bottom: var(--space-md);
  font-size: 14px;
}
.code-block {
  background-color: var(--color-surface-1);
  padding: var(--space-sm);
  margin-bottom: var(--space-md);
  border: 1px solid var(--color-hairline);
  border-left: 3px solid var(--color-primary);
  font-family: var(--font-mono);
  font-size: 13px;
  overflow-x: auto;
  white-space: nowrap;
}
.code-block__comment {
  color: var(--color-ink-subtle);
  margin-bottom: var(--space-xxs);
}
.code-block__cmd {
  color: var(--color-ink);
}

.modal-alert {
  background-color: #fff1f1;
  border-left: 4px solid var(--color-error);
  padding: var(--space-sm) var(--space-md);
  font-size: 14px;
  color: var(--color-ink);
  margin-top: var(--space-lg);
}

/* ==========================================================================
   Responsive
   ========================================================================== */

/* Tablet — 1056px */
@media (max-width: 1056px) {
  #uc-reuse {
    grid-column: auto;
  }

  .steps {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
  }

  .pricing__inner {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

  .pricing-card {
    max-width: 400px;
  }

  .problem__inner {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

  .site-footer__inner {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
  }

  .requirements__inner {
    flex-direction: column;
    gap: var(--space-lg);
  }

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

  .power-feature--reverse .power-feature__content,
  .power-feature--reverse .power-feature__img-wrap {
    order: unset;
  }
}

/* Tablet small — 672px */
@media (max-width: 672px) {
  .hero__headline {
    font-size: 42px;
    letter-spacing: 0;
  }

  .hero__subheadline {
    font-size: 18px;
  }

  .hero {
    padding: var(--space-xxl) var(--space-md) var(--space-xxl);
  }

  .container {
    padding-left: var(--space-md);
    padding-right: var(--space-md);
  }

  .section {
    padding-top: var(--space-xxl);
    padding-bottom: var(--space-xxl);
  }

  .problem,
  .solution,
  .features,
  .how-it-works,
  .use-cases,
  .differentiation,
  .pricing,
  .faq {
    padding-left: var(--space-md);
    padding-right: var(--space-md);
    padding-top: var(--space-xxl);
    padding-bottom: var(--space-xxl);
  }

  .features__headline,
  .how-it-works__headline,
  .use-cases__headline,
  .differentiation__headline,
  .pricing__headline,
  .solution__headline,
  .problem__headline,
  .faq__headline,
  .cta-banner__headline {
    font-size: 32px;
    font-weight: 400;
    line-height: 1.25;
  }

  .steps {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

  .step__number {
    font-size: 42px;
  }

  .use-cases__grid {
    grid-template-columns: 1fr;
  }

  .comparison-table {
    font-size: 13px;
  }

  .comparison-table thead th,
  .comparison-table tbody td {
    padding: var(--space-sm) var(--space-md);
  }

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

  .pricing-card {
    max-width: 100%;
  }

  .site-footer__inner {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

  .site-footer__bottom {
    flex-direction: column;
    text-align: center;
  }

  .top-nav__links {
    display: none;
  }

  .top-nav {
    top: 0;
  }

  .promo-bar {
    position: relative;
    font-size: 13px;
  }

  .promo-bar__inner {
    flex-direction: column;
    gap: var(--space-xs);
  }

  .requirements__list {
    flex-direction: column;
    gap: var(--space-sm);
  }

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

  .cta-banner {
    padding: var(--space-xxl) var(--space-md);
  }

  .cta-banner__headline {
    font-size: 32px;
  }

  .power-features {
    padding-left: var(--space-md);
    padding-right: var(--space-md);
    padding-top: var(--space-xxl);
    padding-bottom: var(--space-xxl);
  }

  .power-features__headline {
    font-size: 32px;
    font-weight: 400;
    line-height: 1.25;
  }

  .power-feature__title {
    font-size: 20px;
  }

  .origin {
    padding: var(--space-xl) var(--space-md);
  }

  .requirements {
    padding: var(--space-xl) var(--space-md);
  }

  .site-footer {
    padding: var(--space-xxl) var(--space-md) var(--space-md);
  }
}

/* Mobile — 320px */
@media (max-width: 480px) {
  .hero__headline {
    font-size: 32px;
    font-weight: 300;
    line-height: 1.25;
  }

  .hero__subheadline {
    font-size: 16px;
  }

  .pricing-card__amount {
    font-size: 42px;
  }

  .comparison-table {
    font-size: 12px;
  }

  .comparison-table thead th,
  .comparison-table tbody td {
    padding: var(--space-xs) var(--space-sm);
  }
}

/* Modals Mobile Fixes */
@media (max-width: 600px) {
  .gatekeeper-step {
    flex-direction: column;
    align-items: flex-start;
  }
  .gatekeeper-mockup {
    width: 100%;
    flex: none;
  }
}