:root {
  --bg-dark: #0f1317;
  --bg-dark-soft: #141a1f;
  --bg-light: #f5f2ea;
  --bg-tint: #edf1f7;
  --surface: rgba(255, 255, 255, 0.04);
  --surface-strong: #ffffff;
  --surface-terminal: #111519;
  --text-dark: #11161b;
  --text-light: #f7f5ef;
  --text-muted: rgba(247, 245, 239, 0.74);
  --text-soft: #48515a;
  --accent: #96a8c8;
  --accent-deep: #6f84aa;
  --border-dark: rgba(255, 255, 255, 0.08);
  --border-light: rgba(17, 22, 27, 0.1);
  --shadow-lg: 0 26px 60px rgba(0, 0, 0, 0.22);
  --shadow-md: 0 16px 32px rgba(0, 0, 0, 0.12);
  --radius-xl: 30px;
  --radius-lg: 22px;
  --radius-md: 16px;
  --radius-sm: 10px;
  --font-sans: "Avenir Next", "Trebuchet MS", "Segoe UI", sans-serif;
  --font-display: "Avenir Next Condensed", "Arial Narrow", "Trebuchet MS", sans-serif;
  --font-mono: "SFMono-Regular", "IBM Plex Mono", "Menlo", "Consolas", monospace;
  --shell: min(1120px, calc(100vw - 2rem));
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--bg-light);
  color: var(--text-dark);
}

img,
svg {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
}

code {
  font-family: var(--font-mono);
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  background: var(--surface-strong);
  color: var(--text-dark);
  padding: 0.75rem 1rem;
  border-radius: 999px;
  z-index: 20;
}

.skip-link:focus {
  top: 1rem;
}

.shell {
  width: var(--shell);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(20px);
  background: rgba(15, 19, 23, 0.88);
  border-bottom: 1px solid var(--border-dark);
}

.header-shell,
.footer-shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.header-shell {
  min-height: 4.75rem;
}

.brand {
  display: flex;
  align-items: baseline;
  text-decoration: none;
  color: var(--text-light);
}

.brand-mark,
.section-heading h2,
.guide-copy h2,
.install-card h2,
.passkey-copy h2,
.faq-question {
  font-family: var(--font-mono);
}

.brand-mark {
  font-size: clamp(1.65rem, 2vw, 2.25rem);
  font-weight: 800;
  letter-spacing: -0.05em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 2rem;
  color: var(--text-light);
}

.site-nav a {
  text-decoration: none;
  color: var(--text-muted);
}

.site-nav a:hover,
.site-nav a:focus-visible,
.footer-shell a:hover,
.footer-shell a:focus-visible {
  color: var(--accent);
}

.nav-toggle {
  display: none;
  width: 3rem;
  height: 3rem;
  padding: 0.75rem;
  border: 1px solid var(--border-dark);
  border-radius: 999px;
  background: transparent;
}

.nav-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  margin: 4px 0;
  background: var(--text-light);
}

.hero {
  padding: 4.5rem 0 4rem;
  background:
    radial-gradient(circle at top left, rgba(150, 168, 200, 0.12), transparent 24rem),
    linear-gradient(180deg, #12161a, var(--bg-dark));
  color: var(--text-light);
}

.hero-grid,
.guide-grid,
.install-grid {
  display: grid;
  gap: 2rem;
}

.hero-grid {
  grid-template-columns: minmax(0, 2fr) minmax(260px, 1fr);
  align-items: center;
}

.eyebrow,
.kicker {
  margin: 0 0 1rem;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(3.3rem, 9vw, 5.8rem);
  line-height: 0.94;
  letter-spacing: -0.07em;
}

.hero h1 span,
.passkey-copy h2 span {
  display: block;
  margin-top: 0.2em;
  color: var(--accent);
}

.hero-body {
  max-width: 34rem;
  margin: 1.75rem 0 0;
  color: var(--text-muted);
  font-size: clamp(1.125rem, 2vw, 1.5rem);
  line-height: 1.6;
}

.hero-body a,
.footer-shell a {
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.14em;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.hero-actions {
  margin-top: 2rem;
}

.button,
.copy-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3.5rem;
  padding: 0.85rem 1.35rem;
  border-radius: 0.95rem;
  border: 1px solid transparent;
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  transition:
    transform 160ms ease,
    border-color 160ms ease,
    background-color 160ms ease,
    color 160ms ease;
}

.button:hover,
.button:focus-visible,
.copy-button:hover,
.copy-button:focus-visible,
.faq-question:hover,
.faq-question:focus-visible {
  transform: translateY(-1px);
}

.button-primary {
  background: var(--accent);
  color: #1b2434;
}

.button-primary:hover,
.button-primary:focus-visible {
  background: #a7b4cc;
}

.button-secondary,
.copy-button {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.18);
  color: var(--text-light);
}

.button-secondary:hover,
.button-secondary:focus-visible {
  border-color: var(--accent);
}

.install-card .button-secondary {
  border-color: var(--border-light);
  color: var(--text-dark);
}

.comic-card {
  position: relative;
  display: flex;
  justify-content: flex-end;
}

.hero-asset-frame {
  margin: 0;
  padding: 0;
  overflow: visible;
}

.hero-asset {
  display: block;
  width: min(100%, 26rem);
  height: auto;
  margin-left: auto;
  background: transparent;
}

.section {
  padding: 4.5rem 0;
}

.section[id] {
  scroll-margin-top: 5.75rem;
}

.section-light {
  background: transparent;
}

.section-tint {
  background:
    linear-gradient(135deg, rgba(150, 168, 200, 0.1), rgba(255, 255, 255, 0.4)),
    var(--bg-tint);
}

.section-heading {
  text-align: center;
  margin-bottom: 2.5rem;
}

.section-heading h2,
.guide-copy h2,
.install-card h2,
.passkey-copy h2 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3.1rem);
  line-height: 1.06;
  letter-spacing: -0.04em;
}

.section-heading .kicker {
  margin-bottom: 0.7rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1.25rem;
}

.feature-card,
.install-card,
.faq-item {
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.62);
  box-shadow: 0 16px 34px rgba(33, 37, 41, 0.05);
}

.feature-card {
  padding: 1.5rem;
}

.feature-icon {
  width: 3rem;
  height: 3rem;
  display: grid;
  place-items: center;
  margin-bottom: 1rem;
  border-radius: 0.95rem;
  background: rgba(150, 168, 200, 0.14);
  color: var(--accent-deep);
}

.feature-icon svg,
.passkey-mark svg {
  width: 1.6rem;
  height: 1.6rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.feature-card h3 {
  margin: 0 0 0.65rem;
  font-family: var(--font-mono);
  font-size: 1.4rem;
}

.feature-card p,
.guide-copy p,
.install-card p,
.passkey-copy p,
.faq-answer p,
.footer-shell p {
  margin: 0;
  color: var(--text-soft);
  line-height: 1.7;
}

.guide-grid {
  grid-template-columns: minmax(0, 0.95fr) minmax(320px, 1.05fr);
  align-items: center;
}

.guide-copy {
  max-width: 34rem;
}

.guide-copy p,
.install-card p,
.passkey-copy p {
  margin-top: 1rem;
}

.terminal-card {
  border-radius: 1.2rem;
  background: var(--surface-terminal);
  color: var(--text-light);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

.terminal-body {
  padding: 1.5rem;
  font-family: var(--font-mono);
  font-size: clamp(0.95rem, 1.4vw, 1.1rem);
  line-height: 1.65;
}

.terminal-body p {
  margin: 0;
}

.terminal-output {
  margin-bottom: 0.85rem;
  color: rgba(247, 245, 239, 0.8);
  overflow-wrap: anywhere;
}

.prompt {
  color: var(--accent);
}

.passkey-grid {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) minmax(250px, 0.85fr);
  gap: 2rem;
  align-items: center;
  padding: 2.25rem;
  border: 1px solid rgba(111, 132, 170, 0.2);
  border-radius: var(--radius-xl);
  background: rgba(255, 255, 255, 0.46);
}

.passkey-mark {
  width: 7rem;
  height: 7rem;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: var(--accent-deep);
  background: rgba(150, 168, 200, 0.14);
}

.passkey-mark svg {
  width: 4rem;
  height: 4rem;
}

.check-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
  color: var(--text-dark);
}

.check-list li {
  position: relative;
  padding-left: 1.7rem;
  line-height: 1.6;
}

.check-list li::before {
  content: "\2713";
  position: absolute;
  left: 0;
  color: var(--accent-deep);
  font-weight: 800;
}

.install-grid {
  grid-template-columns: minmax(0, 1fr);
  align-items: stretch;
}

.install-card {
  padding: 1.6rem;
  max-width: 46rem;
}

.install-card h2 + p {
  margin-top: 0;
  font-size: 1.2rem;
  line-height: 1.8;
}

.install-card a {
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.14em;
}

.footer-license-link {
  color: inherit;
  font-family: inherit;
}

.command-card {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-top: 1.25rem;
  padding: 0.75rem;
  border-radius: var(--radius-md);
  background: var(--surface-terminal);
  box-shadow: var(--shadow-md);
}

.command-line {
  flex: 1;
  min-width: 0;
  padding: 0.5rem 0.75rem;
  color: var(--text-light);
  font-family: var(--font-mono);
  overflow-x: auto;
  white-space: nowrap;
}

.copy-button {
  flex: 0 0 auto;
  width: 2.8rem;
  min-width: 2.8rem;
  min-height: 2.8rem;
  padding: 0;
}

.command-card .copy-button {
  border-color: rgba(247, 245, 239, 0.14);
  background: rgba(247, 245, 239, 0.05);
  color: var(--text-light);
}

.command-card .copy-button:hover,
.command-card .copy-button:focus-visible {
  border-color: var(--accent);
  background: rgba(150, 168, 200, 0.14);
  color: var(--text-light);
}

.copy-button.is-copied {
  border-color: var(--accent);
  color: var(--accent);
}

.copy-button svg {
  width: 1.1rem;
  height: 1.1rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.command-card .copy-button svg {
  width: 1.2rem;
  height: 1.2rem;
  stroke: rgba(247, 245, 239, 0.96);
}

.faq-list {
  max-width: 56rem;
  margin: 0 auto;
  display: grid;
  gap: 1rem;
}

.faq-question {
  width: 100%;
  padding: 1.25rem 1.5rem;
  border: 0;
  border-radius: var(--radius-lg);
  background: transparent;
  color: var(--text-dark);
  text-align: left;
  font-size: 1.1rem;
  cursor: pointer;
}

.faq-question::after {
  content: "+";
  float: right;
  color: var(--accent-deep);
}

.faq-question[aria-expanded="true"]::after {
  content: "-";
}

.faq-answer {
  padding: 0 1.5rem 1.4rem;
}

.site-footer {
  border-top: 1px solid var(--border-light);
  background: rgba(255, 255, 255, 0.36);
}

.footer-shell {
  min-height: 5rem;
  color: var(--text-soft);
  font-size: 0.95rem;
}

.footer-shell a {
  font-family: var(--font-mono);
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}

@media (max-width: 980px) {
  .guide-grid,
  .passkey-grid,
  .install-grid,
  .feature-grid {
    grid-template-columns: 1fr;
  }

  .hero-grid {
    grid-template-columns: minmax(0, 1.7fr) minmax(220px, 0.9fr);
    gap: 1.5rem;
  }

  .feature-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

}

@media (max-width: 760px) {
  .header-shell,
  .footer-shell,
  .brand {
    align-items: center;
  }

  .header-shell {
    flex-wrap: wrap;
    padding: 0.7rem 0;
  }

  .brand {
    gap: 0.75rem;
    flex-wrap: wrap;
  }

  .nav-toggle {
    display: none;
    margin-left: auto;
  }

  .site-nav {
    display: flex;
    width: 100%;
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
    padding: 1rem 0 0.4rem;
  }

  .has-enhanced-nav .nav-toggle {
    display: inline-block;
  }

  .has-enhanced-nav .site-nav {
    display: none;
  }

  .has-enhanced-nav .site-nav.is-open {
    display: flex;
  }

  .hero {
    padding-top: 3rem;
  }

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

  .comic-card {
    justify-content: center;
  }

  .hero-asset {
    margin-left: 0;
    margin-right: 0;
  }

  .hero h1 {
    font-size: clamp(2.8rem, 15vw, 4.25rem);
  }

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

  .button {
    width: 100%;
  }

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

  .passkey-grid,
  .feature-card,
  .install-card,
  .faq-item {
    border-radius: var(--radius-md);
  }

  .footer-shell {
    justify-content: center;
    padding: 1rem 0 1.5rem;
    text-align: center;
  }
}