/* SteadyKeeper info site. Plain CSS, no build step. Light and dark follow prefers-color-scheme. */

:root {
  --bg: #f7f8f6;
  --bg-alt: #edf1ee;
  --surface: #ffffff;
  --text: #1d2523;
  --muted: #4a5753;
  --accent: #2f6f68;
  --accent-strong: #245952;
  --accent-text: #ffffff;
  --border: #d5ddd9;
  --focus: #b4530f;
  --radius: 12px;
  --max: 68rem;
  --narrow: 44rem;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121816;
    --bg-alt: #18201e;
    --surface: #1d2725;
    --text: #e6ece9;
    --muted: #b3c0bb;
    --accent: #7cc4b9;
    --accent-strong: #9ad6cc;
    --accent-text: #0e1513;
    --border: #2f3c39;
    --focus: #ffb070;
  }
}

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

html {
  scroll-behavior: smooth;
}

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family:
    system-ui,
    -apple-system,
    'Segoe UI',
    Roboto,
    'Helvetica Neue',
    Arial,
    sans-serif;
  font-size: 1.0625rem;
  line-height: 1.6;
}

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

a {
  color: var(--accent);
  text-underline-offset: 0.15em;
}

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

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
  border-radius: 4px;
}

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding-inline: 1.25rem;
}

.narrow {
  max-width: var(--narrow);
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -4rem;
  background: var(--surface);
  color: var(--text);
  padding: 0.5rem 1rem;
  border-radius: var(--radius);
  z-index: 10;
}

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

/* Header */

.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

.header-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem 1.5rem;
  padding-block: 0.75rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--text);
  text-decoration: none;
}

.brand-mark circle {
  fill: var(--accent);
}

.brand-mark path {
  fill: none;
  stroke: var(--accent-text);
  stroke-width: 3;
  stroke-linecap: round;
}

.nav-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1.25rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-list a {
  color: var(--text);
  text-decoration: none;
  padding: 0.25rem 0;
}

.nav-list a:hover {
  text-decoration: underline;
}

.nav-list .nav-cta {
  color: var(--accent);
  font-weight: 600;
}

/* Hero */

.hero {
  padding-block: 4rem 3.5rem;
}

.eyebrow {
  margin: 0 0 0.75rem;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  line-height: 1.25;
}

h1 {
  margin: 0 0 1rem;
  max-width: 22ch;
  font-size: clamp(2rem, 5.5vw, 3.1rem);
}

.lede {
  max-width: 40rem;
  margin: 0 0 2rem;
  color: var(--muted);
  font-size: 1.2rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 0;
}

/* Buttons */

.button {
  display: inline-block;
  padding: 0.75rem 1.4rem;
  border: 2px solid var(--accent);
  border-radius: 999px;
  background: var(--accent);
  color: var(--accent-text);
  font-weight: 600;
  text-decoration: none;
}

.button:hover {
  background: var(--accent-strong);
  border-color: var(--accent-strong);
  color: var(--accent-text);
}

.button-quiet {
  background: transparent;
  color: var(--accent);
}

.button-quiet:hover {
  background: var(--bg-alt);
  color: var(--accent-strong);
}

.button-large {
  padding: 0.95rem 1.8rem;
  font-size: 1.1rem;
}

/* Sections */

.section {
  padding-block: 3.5rem;
}

.section-alt {
  background: var(--bg-alt);
}

.section h2 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.5rem, 3.5vw, 2rem);
}

.section-intro {
  margin: 0 0 2rem;
  color: var(--muted);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 18rem), 1fr));
  gap: 1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.feature {
  padding: 1.25rem 1.25rem 0.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

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

.feature p {
  margin: 0 0 0.75rem;
  color: var(--muted);
}

.plain-list {
  margin: 0 0 1.25rem;
  padding-left: 1.25rem;
}

.plain-list li {
  margin-bottom: 0.6rem;
}

/* Coming later */

.coming {
  border-top: 1px solid var(--border);
}

.coming p {
  margin: 0;
}

/* Beta */

.beta {
  border-top: 1px solid var(--border);
}

.beta-action {
  margin: 1.75rem 0 0.75rem;
}

.small {
  color: var(--muted);
  font-size: 0.95rem;
}

/* Disclaimer */

.disclaimer {
  background: var(--bg-alt);
}

.disclaimer h2 {
  font-size: 1.25rem;
}

.disclaimer p {
  margin: 0;
}

/* Footer */

.site-footer {
  border-top: 1px solid var(--border);
  background: var(--surface);
  color: var(--muted);
  font-size: 0.95rem;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem 1.5rem;
  padding-block: 1.5rem;
}

.footer-inner p {
  margin: 0;
}

@media (max-width: 30rem) {
  .hero {
    padding-block: 2.5rem 2.5rem;
  }

  .hero-actions .button {
    width: 100%;
    text-align: center;
  }
}

/* Long-form pages such as the privacy notice */

.notice h2 {
  margin: 2.5rem 0 0.75rem;
  font-size: clamp(1.3rem, 3vw, 1.6rem);
}

.notice h3 {
  margin: 1.5rem 0 0.5rem;
  font-size: 1.1rem;
}

.toc ol {
  margin: 0 0 1.25rem;
  padding-left: 1.25rem;
}