:root {
  --font-sans: "Space Grotesk", sans-serif;
  --bg: #0b0b0c;
  --surface: #161618;
  --surface-hover: #1e1e21;
  --surface-elevated: #212124;
  --border: #2a2a2e;
  --text-primary: #f5f5f7;
  --text-secondary: #a1a1a6;
  --text-tertiary: #6e6e73;
  --accent: #0071e3;
  --accent-hover: #0077ed;
  --accent-glow: rgba(0, 113, 227, 0.3);
  --green: #30d158;
  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --transition: 0.2s ease;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  scroll-padding-top: 96px;
}

body {
  font-family: var(--font-sans);
  font-optical-sizing: auto;
  background: var(--bg);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

kbd {
  display: inline-block;
  padding: 2px 7px;
  font-family: var(--font-sans);
  font-size: 0.85em;
  font-weight: 600;
  color: var(--text-primary);
  background: var(--surface-elevated);
  border: 1px solid var(--border);
  border-radius: 5px;
  box-shadow: 0 1px 0 var(--border);
}

section {
  padding: 72px 18px;
  max-width: 1100px;
  margin: 0 auto;
}

h1 {
  font-family: var(--font-sans);
  font-size: 2.35rem;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
  color: var(--text-primary);
}

h2 {
  font-family: var(--font-sans);
  font-size: 1.7rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  text-align: center;
  margin-bottom: 36px;
  color: var(--text-primary);
}

h3 {
  font-family: var(--font-sans);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 8px;
}

p {
  color: var(--text-secondary);
}

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

button {
  font: inherit;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-sans);
  padding: 12px 28px;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 600;
  transition: all var(--transition);
  cursor: pointer;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  border: none;
}

.btn-primary:hover {
  background: var(--accent-hover);
  box-shadow: 0 0 20px var(--accent-glow);
}

.btn-secondary {
  background: var(--surface);
  color: var(--text-primary);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: var(--surface-hover);
  border-color: #3a3a3e;
}

/* Navigation */

.site-nav {
  position: sticky;
  top: 14px;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(100% - 36px, 1100px);
  min-height: 58px;
  margin: 14px auto 0;
  padding: 8px 10px 8px 16px;
  background: rgba(5, 5, 6, 0.92);
  border: 1px solid rgba(42, 42, 46, 0.75);
  border-radius: var(--radius);
  backdrop-filter: blur(16px);
}

.nav-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text-primary);
  font-size: 1.08rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.nav-brand img {
  width: 28px;
  height: 28px;
  display: block;
  border-radius: 7px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-links a,
.mobile-menu-links a {
  color: var(--text-secondary);
  font-size: 0.92rem;
  font-weight: 600;
  transition: color var(--transition), background var(--transition), border-color var(--transition);
}

.nav-links a {
  padding: 8px 12px;
  border-radius: var(--radius-sm);
}

.nav-links a:hover,
.mobile-menu-links a:hover {
  color: var(--text-primary);
}

.nav-links .nav-download {
  margin-left: 4px;
  color: #fff;
  background: var(--accent);
}

.nav-links .nav-download:hover {
  background: var(--accent-hover);
}

.nav-menu-button,
.mobile-menu-close {
  display: none;
  appearance: none;
  border: 0;
  color: var(--text-primary);
  background: transparent;
  cursor: pointer;
}

.nav-menu-button {
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

.nav-menu-button span {
  width: 18px;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
}

.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 40;
  display: none;
  background: rgba(0, 0, 0, 0.58);
}

.mobile-menu.is-open {
  display: block;
}

.mobile-menu-panel {
  position: absolute;
  top: 12px;
  right: 12px;
  left: 12px;
  padding: 14px;
  background: #050506;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.mobile-menu-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

.mobile-menu-close {
  width: 38px;
  height: 38px;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  line-height: 1;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

.mobile-menu-links {
  display: grid;
  gap: 4px;
  padding-top: 12px;
}

.mobile-menu-links a {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 10px 4px;
}

/* Hero */

.hero {
  padding: 62px 18px 24px;
}

.hero-inner {
  max-width: 680px;
  margin: 0 auto;
  text-align: center;
}

.eyebrow {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 12px;
}

.subtitle {
  font-size: 1.08rem;
  line-height: 1.5;
  margin: 0 auto 28px;
  max-width: 560px;
}

.subtitle strong {
  color: var(--text-primary);
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}

.version {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  color: var(--text-tertiary);
}

.version:hover {
  color: var(--text-primary);
}

/* Demo */

.demo {
  max-width: 1280px;
  padding-top: 18px;
  padding-bottom: 72px;
}

.demo-player {
  display: block;
  width: 100%;
  overflow: hidden;
  background: #050506;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.demo-player video {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
}

.demo-quote {
  max-width: 720px;
  margin: 28px auto 0;
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-size: 1.15rem;
  line-height: 1.5;
  text-align: center;
}

/* How it works */

.how-it-works {
  padding-top: 56px;
}

.steps {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 32px;
}

.step {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  max-width: 380px;
  flex: 1;
}

.step-num {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent);
  color: #fff;
  border-radius: 50%;
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.step h3 {
  margin-bottom: 8px;
}

.step h3 kbd {
  font-size: 0.9em;
}

.step-arrow {
  font-size: 1.8rem;
  color: var(--text-tertiary);
  align-self: center;
  flex-shrink: 0;
  padding-top: 40px;
}

/* Features */

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: border-color var(--transition);
}

.feature:hover {
  border-color: #3a3a3e;
}

.feature-icon {
  font-size: 1.5rem;
  margin-bottom: 12px;
}

.feature p {
  font-size: 0.92rem;
  line-height: 1.5;
}

/* Comparison table */

.numbers-comparison {
  background: var(--bg);
}

.comparison-table {
  width: 100%;
  max-width: 700px;
  margin: 0 auto;
  border-collapse: separate;
  border-spacing: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.comparison-table th,
.comparison-table td {
  padding: 14px 20px;
  text-align: left;
  font-size: 0.92rem;
}

.comparison-table thead th {
  background: var(--surface);
  font-weight: 600;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border);
}

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

.comparison-table td {
  border-bottom: 1px solid var(--border);
  color: var(--text-secondary);
}

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

.comparison-table .win {
  color: var(--green);
  font-weight: 600;
}

/* Space switching */

.space-switching {
  max-width: 860px;
  padding-top: 42px;
  padding-bottom: 42px;
}

.space-switching-copy {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(280px, 1.1fr);
  gap: 28px;
  align-items: center;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
  padding: 34px;
}

.space-switching h2 {
  text-align: left;
  margin-bottom: 14px;
}

.space-switching .eyebrow {
  margin-bottom: 10px;
}

.space-switching p:last-child {
  max-width: 640px;
}

.space-switching img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #050506;
}

/* Download */

.download {
  text-align: center;
}

.download-box {
  display: grid;
  gap: 0;
  max-width: 520px;
  margin: 0 auto 40px;
  text-align: left;
}

.download-step {
  position: relative;
  display: grid;
  grid-template-columns: 36px 1fr;
  gap: 16px;
  align-items: start;
  padding: 0 0 28px;
}

.download-step:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 40px;
  bottom: 8px;
  left: 17px;
  width: 1px;
  background: var(--border);
}

.download-step:last-child {
  padding-bottom: 0;
}

.download-step p {
  padding-top: 4px;
}

.step-badge {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--surface-elevated);
  border: 1px solid var(--border);
  border-radius: 50%;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-secondary);
}

.download-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.or {
  color: var(--text-tertiary);
  font-size: 0.85rem;
}

.requirements {
  margin-top: 28px;
  font-size: 0.82rem;
  color: var(--text-tertiary);
}

/* Footer */

footer {
  text-align: center;
  padding: 48px 24px 60px;
  border-top: 1px solid var(--border);
  max-width: 1100px;
  margin: 0 auto;
}

footer p {
  font-size: 0.85rem;
  color: var(--text-tertiary);
}

.footer-meta {
  margin-top: 6px;
  font-size: 0.78rem;
}

/* Responsive */

@media (max-width: 860px) {
  .site-nav {
    top: 10px;
    width: min(100% - 24px, 1100px);
    min-height: 56px;
    margin-top: 10px;
  }

  .nav-links {
    display: none;
  }

  .nav-menu-button,
  .mobile-menu-close {
    display: inline-flex;
  }

  body.menu-open {
    overflow: hidden;
  }

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

  .steps {
    flex-direction: column;
    align-items: center;
  }

  .step {
    max-width: none;
    width: 100%;
  }

  .step-arrow {
    transform: rotate(90deg);
    padding-top: 0;
  }

  .space-switching-copy {
    grid-template-columns: 1fr;
  }
}

@media (min-width: 700px) {
  section {
    padding: 96px 24px;
  }

  .hero {
    padding-top: 72px;
  }

  h1 {
    font-size: 3rem;
  }

  h2 {
    font-size: 2.2rem;
    margin-bottom: 56px;
  }

  .subtitle {
    font-size: 1.2rem;
  }

  .demo {
    padding-top: 24px;
    padding-bottom: 96px;
  }
}

@media (max-width: 500px) {
  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.55rem;
  }

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

  .download-box {
    margin-bottom: 32px;
  }

  .comparison-table th,
  .comparison-table td {
    padding: 10px 14px;
    font-size: 0.8rem;
  }
}