/* ========================================
   keycache.app — landing page
   Tokens mirror src/renderer/styles.css so the
   page and the app read as the same product.
   ======================================== */

:root {
  color-scheme: dark;

  --bg-deep: #0f1117;
  --bg-base: #151821;
  --bg-elevated: #1c1f2e;

  --glass: rgba(255, 255, 255, 0.05);
  --glass-border: rgba(255, 255, 255, 0.08);

  --text-primary: #f0f0f2;
  --text-secondary: #94a3b8;
  --text-muted: #5a6478;

  --accent: #0d9488;
  --accent-hover: #0f766e;
  --accent-glow: rgba(13, 148, 136, 0.25);
  --accent-subtle: rgba(13, 148, 136, 0.12);

  --border: rgba(255, 255, 255, 0.1);

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

  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.4);

  --transition-fast: 150ms cubic-bezier(0.16, 1, 0.3, 1);

  --gutter: 24px;
  --measure: 68ch;
}

@media (prefers-color-scheme: light) {
  :root {
    color-scheme: light;

    --bg-deep: #f5f5f7;
    --bg-base: #eeeef0;
    --bg-elevated: #ffffff;

    --glass: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(0, 0, 0, 0.08);

    --text-primary: #1a1a2e;
    --text-secondary: #4a5568;
    --text-muted: #8a93a5;

    --accent-glow: rgba(13, 148, 136, 0.2);
    --accent-subtle: rgba(13, 148, 136, 0.08);

    --border: rgba(0, 0, 0, 0.1);

    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.14);
  }
}

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

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

body {
  margin: 0;
  padding: 0;
  background: var(--bg-deep);
  /* Teal wash behind the hero, fading into the flat page background. */
  background-image: radial-gradient(
    ellipse 90% 55% at 50% -10%,
    var(--accent-subtle),
    transparent 70%
  );
  background-repeat: no-repeat;
  color: var(--text-primary);
  font-family:
    'Inter',
    -apple-system,
    BlinkMacSystemFont,
    'Segoe UI',
    Roboto,
    sans-serif;
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

main {
  max-width: 880px;
  margin: 0 auto;
  padding: 0 var(--gutter);
}

a {
  color: var(--accent);
  text-decoration-color: color-mix(in srgb, var(--accent) 40%, transparent);
  text-underline-offset: 3px;
  transition: color var(--transition-fast);
}

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

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

code {
  font-family: ui-monospace, 'SF Mono', 'Cascadia Code', Menlo, Consolas, monospace;
  font-size: 0.9em;
  /* Several monospace faces ligate `--` into an em dash, which makes the brew
     command look like something you cannot paste. */
  font-variant-ligatures: none;
}

kbd {
  display: inline-block;
  min-width: 1.6em;
  padding: 1px 6px;
  border: 1px solid var(--border);
  border-bottom-width: 2px;
  border-radius: 6px;
  background: var(--glass);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.8em;
  font-weight: 500;
  line-height: 1.5;
  text-align: center;
}

h1,
h2,
h3 {
  line-height: 1.2;
  letter-spacing: -0.02em;
}

/* ---- Hero ---- */

.hero {
  padding: clamp(64px, 12vw, 112px) 0 clamp(48px, 9vw, 80px);
  text-align: center;
}

.logo {
  width: 72px;
  height: 72px;
  margin-bottom: 20px;
  border-radius: 18px;
  box-shadow: 0 8px 28px var(--accent-glow);
}

.hero h1 {
  margin: 0;
  font-size: clamp(2.5rem, 9vw, 3.5rem);
  font-weight: 700;
}

.tagline {
  margin: 12px 0 0;
  font-size: clamp(1.15rem, 4vw, 1.5rem);
  font-weight: 500;
  color: var(--text-primary);
}

.subtitle {
  max-width: 52ch;
  margin: 16px auto 0;
  color: var(--text-secondary);
  text-wrap: balance;
}

.demo {
  margin: clamp(32px, 6vw, 48px) 0 0;
}

.demo img {
  width: 100%;
  max-width: 340px;
  height: auto;
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-top: clamp(32px, 6vw, 44px);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 24px;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  font-size: 0.975rem;
  font-weight: 600;
  text-decoration: none;
  transition:
    background var(--transition-fast),
    border-color var(--transition-fast),
    transform var(--transition-fast);
}

.btn:active {
  transform: translateY(1px);
}

.btn-primary {
  background: var(--accent);
  color: #ffffff;
  box-shadow: 0 6px 20px var(--accent-glow);
}

.btn-primary:hover {
  background: var(--accent-hover);
  color: #ffffff;
}

.btn-ghost {
  border-color: var(--border);
  background: var(--glass);
  color: var(--text-primary);
}

.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--text-primary);
}

.cta-note {
  margin: 16px 0 0;
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* ---- Prose sections ---- */

section:not(.hero) {
  padding: clamp(40px, 8vw, 64px) 0;
  border-top: 1px solid var(--border);
}

section h2 {
  margin: 0 0 20px;
  font-size: clamp(1.4rem, 5vw, 1.75rem);
  font-weight: 600;
}

.pitch p {
  max-width: var(--measure);
  margin: 0 0 16px;
  color: var(--text-secondary);
}

.pitch p:last-child {
  margin-bottom: 0;
}

.pitch code {
  padding: 2px 6px;
  border-radius: 6px;
  background: var(--glass);
  color: var(--text-primary);
}

/* ---- Features ---- */

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.feature-grid li {
  padding: 20px;
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  background: var(--glass);
}

.feature-grid h3 {
  margin: 0 0 8px;
  font-size: 1rem;
  font-weight: 600;
}

.feature-grid p {
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.925rem;
}

/* ---- FAQ ---- */

.faq h3 {
  margin: 28px 0 8px;
  font-size: 1.05rem;
  font-weight: 600;
}

.faq h3:first-of-type {
  margin-top: 0;
}

.faq p {
  max-width: var(--measure);
  margin: 0;
  color: var(--text-secondary);
}

/* ---- Install ---- */

.install h3 {
  margin: 0 0 12px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.install-direct {
  margin-top: 36px;
}

.code-copy {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  background: var(--bg-elevated);
}

/* The command scrolls inside its own box rather than the row, so the Copy
   button stays put on narrow screens instead of scrolling out of reach. */
.code-copy code {
  flex: 1;
  min-width: 0;
  overflow-x: auto;
  white-space: nowrap;
  color: var(--text-primary);
}

.code-copy button {
  flex-shrink: 0;
  padding: 6px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--glass);
  color: var(--text-secondary);
  font-family: inherit;
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  transition:
    border-color var(--transition-fast),
    color var(--transition-fast);
}

.code-copy button:hover {
  border-color: var(--accent);
  color: var(--accent);
}

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

.download-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.download-list li {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  background: var(--glass);
}

.download-list li + li {
  border-top: 1px solid var(--glass-border);
}

/* Set by downloads.js once the visitor's OS is known. */
.download-list li.is-current {
  background: var(--accent-subtle);
}

.download-list .platform {
  font-weight: 500;
}

.download-list .links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.925rem;
}

.version-note {
  margin: 14px 0 0;
  color: var(--text-muted);
  font-size: 0.875rem;
}

.unsigned {
  margin-top: 36px;
  padding: 16px 20px;
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  background: var(--glass);
}

.unsigned summary {
  font-weight: 500;
  cursor: pointer;
}

.unsigned p,
.unsigned li {
  color: var(--text-secondary);
  font-size: 0.925rem;
}

.unsigned p {
  max-width: var(--measure);
}

.unsigned > :nth-child(2) {
  margin-top: 16px;
}

.unsigned ul {
  padding-left: 20px;
}

.unsigned code {
  padding: 2px 6px;
  border-radius: 6px;
  background: var(--bg-elevated);
  color: var(--text-primary);
}

/* ---- Footer ---- */

footer {
  max-width: 880px;
  margin: 0 auto;
  padding: 32px var(--gutter) 56px;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.875rem;
  text-align: center;
}

footer p {
  margin: 0;
}

footer span {
  margin: 0 8px;
}

.colophon {
  margin-top: 8px;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}