:root {
  --color-bg: #13161b;
  --color-surface: #1c2027;
  --color-surface-2: #242b34;
  --color-text: #f6f8fb;
  --color-text-muted: #c6ced8;
  --color-border: #313845;
  --color-accent: #63d4ff;
  --color-accent-2: #5f7dff;
  --color-success: #42be65;
  --color-warm: #ff8a3d;
  --color-pink: #14b8a6;
  --color-violet: #be95ff;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;

  --shadow-soft: 0 16px 40px rgba(17, 22, 31, 0.35);
  --shadow-accent: 0 14px 36px rgba(99, 212, 255, 0.18);

  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-15: 60px;
  --space-20: 80px;
  --space-25: 100px;

  --container: 1040px;
  --header-height: 76px;
  --content-max: 740px;

  --font-sans: "IBM Plex Sans", "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", "SF Mono", Monaco, "Cascadia Code", monospace;
}

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

html {
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  font-family: var(--font-sans);
  line-height: 1.7;
  color: var(--color-text);
  background:
    radial-gradient(circle at 10% 0%, rgba(95, 125, 255, 0.2) 0%, transparent 45%),
    radial-gradient(circle at 90% 10%, rgba(20, 184, 166, 0.18) 0%, transparent 40%),
    var(--color-bg);
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color 180ms ease;
}

a:hover {
  color: #a7e9ff;
}

main {
  padding-top: var(--header-height);
}

.container {
  width: min(var(--container), 100% - 3rem);
  margin-inline: auto;
}

.header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  background: color-mix(in srgb, var(--color-bg) 88%, transparent);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(10px);
}

.header-inner {
  min-height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.logo-icon {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  object-fit: contain;
}

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

.nav a {
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

.nav a:hover,
.nav a.active {
  color: var(--color-text);
}

.hero {
  padding: clamp(var(--space-20), 13vw, 140px) 0 var(--space-25);
  text-align: center;
}

.hero-title {
  margin-bottom: var(--space-6);
  font-size: clamp(2.2rem, 6.5vw, 3.9rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  background: linear-gradient(130deg, #fff 20%, var(--color-accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: fade-up 500ms ease;
}

.hero-subtitle {
  width: min(65ch, 100%);
  margin: 0 auto var(--space-10);
  color: var(--color-text-muted);
  font-size: clamp(1rem, 2.4vw, 1.28rem);
  animation: fade-up 600ms ease 80ms both;
}

.hero-cta {
  display: flex;
  justify-content: center;
  gap: var(--space-4);
  animation: fade-up 700ms ease 140ms both;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.82rem 1.45rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  font-weight: 600;
  font-size: 0.98rem;
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease, color 180ms ease;
}

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--color-pink), var(--color-violet));
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 28px rgba(20, 184, 166, 0.35);
}

.btn-secondary {
  color: var(--color-text);
  border-color: var(--color-border);
  background: color-mix(in srgb, var(--color-surface) 82%, transparent);
}

.btn-secondary:hover {
  background: var(--color-surface-2);
}

.screenshot {
  width: min(920px, 100% - 3rem);
  margin: 0 auto var(--space-25);
  border-radius: var(--radius-lg);
  overflow: hidden;
  animation: fade-in 700ms ease 250ms both;
}

.screenshot img,
.content-image img,
.prose img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.features {
  padding-block: var(--space-25);
}

.section-title {
  margin-bottom: var(--space-15);
  text-align: center;
  font-size: clamp(1.8rem, 5vw, 2.7rem);
  letter-spacing: -0.01em;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-6);
}

.feature-card {
  padding: var(--space-8);
  background: linear-gradient(180deg, rgba(38, 44, 54, 0.88), rgba(26, 32, 40, 0.92));
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: transform 220ms ease, border-color 220ms ease, box-shadow 220ms ease;
}

.feature-card:hover {
  transform: translateY(-3px);
  border-color: color-mix(in srgb, var(--color-accent) 55%, var(--color-border));
  box-shadow: var(--shadow-accent);
}

.feature-icon {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  margin-bottom: var(--space-5);
  border-radius: 10px;
  font-size: 1.25rem;
  color: #fff;
  background: linear-gradient(135deg, var(--color-accent-2), var(--color-accent));
}

.feature-card:nth-child(2) .feature-icon {
  background: linear-gradient(135deg, var(--color-pink), var(--color-violet));
}

.feature-card:nth-child(3) .feature-icon {
  background: linear-gradient(135deg, var(--color-success), #1ec8b8);
}

.feature-card:nth-child(4) .feature-icon {
  background: linear-gradient(135deg, var(--color-warm), #ffd166);
}

.feature-card:nth-child(5) .feature-icon {
  background: linear-gradient(135deg, var(--color-violet), var(--color-accent-2));
}

.feature-card:nth-child(6) .feature-icon {
  background: linear-gradient(135deg, var(--color-accent), #1ec8b8);
}

.feature-title {
  margin-bottom: var(--space-3);
  font-size: 1.2rem;
}

.feature-desc {
  color: var(--color-text-muted);
  font-size: 0.98rem;
}

.content-section {
  padding-block: var(--space-20);
}

.content-section--alt {
  background: color-mix(in srgb, var(--color-surface) 72%, transparent);
}

.two-col {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(var(--space-8), 6vw, 72px);
  align-items: center;
}

.two-col.reverse .content-text {
  order: 2;
}

.two-col.reverse .content-image {
  order: 1;
}

.content-text h2 {
  margin-bottom: var(--space-5);
  font-size: clamp(1.55rem, 4.2vw, 2.2rem);
  line-height: 1.25;
}

.content-text p {
  margin-bottom: var(--space-4);
  color: var(--color-text-muted);
}

.footer {
  padding: var(--space-15) 0;
  border-top: 1px solid var(--color-border);
  text-align: center;
}

.footer-text {
  color: var(--color-text-muted);
  font-size: 0.94rem;
}

.page-shell {
  padding: var(--space-20) 0 var(--space-25);
}

.prose {
  width: min(var(--content-max), 100%);
  margin-inline: auto;
}

.prose :where(h1, h2, h3) {
  color: var(--color-text);
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.prose h1 {
  margin-bottom: var(--space-6);
  font-size: clamp(2rem, 5.3vw, 2.8rem);
}

.prose h2 {
  margin: var(--space-12) 0 var(--space-4);
  font-size: clamp(1.45rem, 4vw, 1.95rem);
}

.prose h3 {
  margin: var(--space-8) 0 var(--space-3);
  font-size: 1.3rem;
}

.prose p {
  margin-bottom: var(--space-4);
  color: var(--color-text-muted);
}

.prose :where(ul, ol) {
  margin: var(--space-4) 0;
  padding-left: var(--space-6);
  color: var(--color-text-muted);
}

.prose li {
  margin: var(--space-2) 0;
}

.prose code {
  padding: 2px 7px;
  border-radius: 6px;
  color: #ffb189;
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--color-surface);
}

.prose pre {
  margin: var(--space-5) 0;
  overflow-x: auto;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  padding: var(--space-4);
}

.prose pre code {
  padding: 0;
  background: none;
}

.prose blockquote {
  margin: var(--space-5) 0;
  border-left: 3px solid var(--color-accent);
  padding-left: var(--space-5);
  color: var(--color-text-muted);
  font-style: italic;
}

.prose hr {
  margin: var(--space-12) 0;
  border: 0;
  border-top: 1px solid var(--color-border);
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-6) 0;
}

.prose :where(th, td) {
  border-bottom: 1px solid var(--color-border);
  text-align: left;
  padding: 0.7rem 0.9rem;
}

.prose th {
  color: var(--color-text);
  font-weight: 600;
}

.prose td {
  color: var(--color-text-muted);
}

@keyframes fade-in {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 900px) {
  .hero-cta {
    flex-wrap: wrap;
  }

  .two-col {
    grid-template-columns: 1fr;
    gap: var(--space-10);
  }

  .two-col.reverse .content-text,
  .two-col.reverse .content-image {
    order: initial;
  }
}

@media (max-width: 640px) {
  .container,
  .screenshot {
    width: min(var(--container), 100% - 1.5rem);
  }

  .header-inner {
    gap: var(--space-4);
    flex-wrap: wrap;
    justify-content: center;
    padding-block: var(--space-3);
  }

  .nav {
    gap: var(--space-5);
  }

  main {
    padding-top: calc(var(--header-height) + 20px);
  }

  .features,
  .page-shell,
  .content-section {
    padding-block: var(--space-15);
  }
}