/* ==========================================================================
   Design tokens
   ========================================================================== */
:root {
  color-scheme: light dark;

  /* Tier 1: literal tokens */
  --color-blue-40: oklch(55% 0.19 260);
  --color-blue-75: oklch(75% 0.15 260);
  --color-gray-98: oklch(98% 0.004 260);
  --color-gray-92: oklch(92% 0.006 260);
  --color-gray-90: oklch(90% 0.01 260);
  --color-gray-65: oklch(65% 0.015 260);
  --color-gray-45: oklch(45% 0.015 260);
  --color-gray-30: oklch(30% 0.015 260);
  --color-gray-20: oklch(20% 0.015 260);
  --color-gray-15: oklch(15% 0.015 260);
  --color-gray-12: oklch(12% 0.015 260);

  /* Tier 2: semantic tokens */
  --color-bg: light-dark(var(--color-gray-98), var(--color-gray-12));
  --color-surface: light-dark(white, var(--color-gray-15));
  --color-surface-raised: light-dark(white, var(--color-gray-20));
  --color-text: light-dark(var(--color-gray-20), var(--color-gray-92));
  --color-text-muted: light-dark(var(--color-gray-45), var(--color-gray-65));
  --color-border: light-dark(var(--color-gray-90), var(--color-gray-30));
  --color-accent: light-dark(var(--color-blue-40), var(--color-blue-75));
  --color-accent-text: light-dark(white, var(--color-gray-12));

  --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  --radius-md: 0.75rem;
  --radius-lg: 1.25rem;
  --shadow-card: 0 1px 2px oklch(0% 0 0 / 4%), 0 8px 24px oklch(0% 0 0 / 6%);

  accent-color: var(--color-accent);
  scrollbar-color: light-dark(var(--color-gray-90), var(--color-gray-30)) transparent;
}

/* ==========================================================================
   Reset & base
   ========================================================================== */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.5;
  overflow-wrap: break-word;
}

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

h1,
h2,
h3 {
  line-height: 1.15;
  text-wrap: balance;
}

p {
  text-wrap: pretty;
}

a {
  color: inherit;
}

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

.visually-hidden {
  position: absolute;
  inline-size: 1px;
  block-size: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

/* ==========================================================================
   Layout shell
   ========================================================================== */
.wrap {
  inline-size: min(100% - 3rem, 72rem);
  margin-inline: auto;
}

/* ==========================================================================
   Nav
   ========================================================================== */
.site-nav {
  position: sticky;
  top: env(safe-area-inset-top, 0px);
  z-index: 10;
  background: color-mix(in oklab, var(--color-bg) 88%, transparent);
  backdrop-filter: blur(12px);
  border-block-end: 1px solid var(--color-border);
}

.site-nav .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  block-size: 4rem;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 700;
  font-size: 1.05rem;
  text-decoration: none;
  color: var(--color-text);
}

.brand img {
  inline-size: 1.75rem;
  block-size: 1.75rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  text-decoration: none;
  color: var(--color-text-muted);
  font-size: 0.95rem;
  transition: color 0.15s ease;
}

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

.nav-links .btn {
  color: var(--color-accent-text);
}

.nav-toggle {
  display: none;
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-block-size: 2.75rem;
  padding-inline: 1.4rem;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, background-color 0.15s ease, border-color 0.15s ease;
}

.btn:active {
  transform: scale(0.98);
}

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

.btn-primary:hover {
  background: color-mix(in oklab, var(--color-accent), black 10%);
}

.btn-secondary {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border);
}

.btn-secondary:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.btn-block {
  inline-size: 100%;
}

.download-actions {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

/* ==========================================================================
   Hero
   ========================================================================== */
.hero {
  padding-block: clamp(3.5rem, 6vw + 1rem, 7rem) clamp(2.5rem, 4vw, 4rem);
  text-align: center;
}

.hero-icon {
  display: block;
  inline-size: clamp(7rem, 5rem + 8vw, 10rem);
  block-size: auto;
  margin-inline: auto;
  margin-block-end: 1.25rem;
  animation: hero-icon-float 6s ease-in-out infinite;
}

@keyframes hero-icon-float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-0.5rem); }
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.3rem 0.85rem;
  border-radius: 999px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  margin-block-end: 1.5rem;
}

.hero h1 {
  font-size: clamp(2.25rem, 1.6rem + 3vw, 3.75rem);
  margin-block: 0 1.1rem;
  letter-spacing: -0.02em;
}

.hero h1 .accent {
  color: var(--color-accent);
}

.hero-subtitle {
  font-size: clamp(1.05rem, 0.95rem + 0.4vw, 1.25rem);
  color: var(--color-text-muted);
  max-inline-size: 40rem;
  margin-inline: auto;
  margin-block-end: 2.25rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.85rem;
}

.hero-note {
  margin-block-start: 1.25rem;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* ==========================================================================
   Sections
   ========================================================================== */
section {
  padding-block: clamp(2.5rem, 5vw, 5rem);
}

.section-head {
  text-align: center;
  max-inline-size: 40rem;
  margin-inline: auto;
  margin-block-end: clamp(2rem, 4vw, 3rem);
}

.section-head h2 {
  font-size: clamp(1.6rem, 1.3rem + 1.2vw, 2.25rem);
  margin-block-end: 0.6rem;
}

.section-head p {
  color: var(--color-text-muted);
  font-size: 1.05rem;
}

/* ==========================================================================
   Feature grid
   ========================================================================== */
.feature-grid {
  display: grid;
  /* Wide enough cards that the nine features form a 3 × 3 grid on desktop. */
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 20rem), 1fr));
  gap: 1.25rem;
}

.feature-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
}

.feature-card .icon {
  inline-size: 2.75rem;
  block-size: 2.75rem;
  border-radius: var(--radius-md);
  display: grid;
  place-items: center;
  background: color-mix(in oklab, var(--color-accent) 14%, transparent);
  color: var(--color-accent);
  margin-block-end: 1rem;
}

.feature-card .icon svg {
  inline-size: 1.4rem;
  block-size: 1.4rem;
}

.feature-card h3 {
  font-size: 1.1rem;
  margin-block: 0 0.5rem;
}

.feature-card p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  margin: 0;
}

/* ==========================================================================
   How it works
   ========================================================================== */
.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 16rem), 1fr));
  gap: 1.5rem;
}

.step {
  position: relative;
  padding-inline-start: 3.25rem;
}

.step .step-number {
  position: absolute;
  inset-inline-start: 0;
  inset-block-start: 0;
  inline-size: 2.25rem;
  block-size: 2.25rem;
  border-radius: 50%;
  background: var(--color-accent);
  color: var(--color-accent-text);
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 0.95rem;
}

.step h3 {
  font-size: 1.05rem;
  margin-block: 0.15rem 0.4rem;
}

.step p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  margin: 0;
}

/* ==========================================================================
   CTA band
   ========================================================================== */
.cta-band {
  border-radius: var(--radius-lg);
  background: color-mix(in oklab, var(--color-accent) 10%, var(--color-surface));
  border: 1px solid var(--color-border);
  padding: clamp(2rem, 5vw, 3.5rem);
  text-align: center;
}

.cta-band h2 {
  font-size: clamp(1.5rem, 1.2rem + 1vw, 2rem);
  margin-block: 0 0.6rem;
}

.cta-band p {
  color: var(--color-text-muted);
  margin-block-end: 1.5rem;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  border-block-start: 1px solid var(--color-border);
  padding-block: 2.5rem;
  padding-block-end: calc(2.5rem + env(safe-area-inset-bottom, 0px));
}

.site-footer .wrap {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 0.9rem;
}

.footer-links a:hover {
  color: var(--color-text);
}

.footer-note {
  color: var(--color-text-muted);
  font-size: 0.85rem;
  margin: 0;
}

/* ==========================================================================
   Download page
   ========================================================================== */
.download-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: clamp(1.75rem, 4vw, 2.75rem);
  max-inline-size: 34rem;
  margin-inline: auto;
  text-align: center;
}

.download-icon {
  display: block;
  inline-size: 8rem;
  block-size: auto;
  margin-inline: auto;
  margin-block: -0.75rem 0.5rem;
}

.download-meta {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-block: 1.25rem;
  flex-wrap: wrap;
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.download-meta strong {
  color: var(--color-text);
  display: block;
  font-size: 1rem;
}

.requirements {
  text-align: start;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  margin-block-start: 2rem;
}

.requirements h3 {
  font-size: 0.95rem;
  margin-block: 0 0.6rem;
}

.requirements ul {
  margin: 0;
  padding-inline-start: 1.2rem;
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.requirements li + li {
  margin-block-start: 0.35rem;
}

.install-steps {
  text-align: start;
  margin-block-start: 2.5rem;
}

.install-steps ol {
  padding-inline-start: 1.2rem;
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.install-steps li + li {
  margin-block-start: 0.6rem;
}

.install-steps code {
  font-family: var(--font-mono);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 0.3rem;
  padding: 0.1rem 0.4rem;
  font-size: 0.85em;
}

/* ==========================================================================
   Small screens
   ========================================================================== */
@media (max-width: 40rem) {
  .nav-links {
    display: none;
    position: fixed;
    inset-block-start: 4rem;
    inset-inline: 0;
    /* Explicit height rather than relying on inset top+bottom auto-stretch,
       which some engines fail to resolve correctly on a flex container. */
    block-size: calc(100dvh - 4rem);
    overflow-y: auto;
    flex-direction: column;
    align-items: stretch;
    padding: 1.5rem;
    gap: 1rem;
    background: var(--color-surface);
    border-block-start: 1px solid var(--color-border);
    box-shadow: var(--shadow-card);
  }

  .nav-links[data-open="true"] {
    display: flex;
  }

  .nav-links a {
    font-size: 1.05rem;
    padding-block: 0.5rem;
  }

  .nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    inline-size: 2.5rem;
    block-size: 2.5rem;
    border-radius: 0.5rem;
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    color: var(--color-text);
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    transition-duration: 0.001ms !important;
    animation-duration: 0.001ms !important;
  }

  .hero-icon {
    animation: none;
  }
}