/* ferrisping.com. The colours are the app's own light and dark themes (crates/ferrisping/src/theme.rs),
   with the crab's orange for the download button. The page follows the system theme; there's no script. */

:root {
  color-scheme: light dark;
  --page: #f3f3f1;
  --surface: #fcfcfb;
  --raised: #ebebe8;
  --border: #e4e4e3;
  --border-strong: #cfcfca;
  --text: #0b0b0b;
  --text-2: #52514e;
  --muted: #6b6a65;
  --link: #1f63b8;
  --ping: #2a78d6;
  --brand: #e24500;
  --warning: #fab219;
  --cta: #c2410c;
  --cta-hover: #a8380a;
  --on-cta: #ffffff;
  --shadow: 0 1px 2px rgb(0 0 0 / 0.06), 0 14px 36px -10px rgb(0 0 0 / 0.2);
  --radius: 12px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "Cascadia Mono", Consolas, "SF Mono", Menlo, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --page: #0d0d0d;
    --surface: #1a1a19;
    --raised: #242423;
    --border: #313130;
    --border-strong: #45453f;
    --text: #f0efec;
    --text-2: #c3c2b7;
    --muted: #9a988f;
    --link: #6aa8f2;
    --ping: #3987e5;
    --cta: #ff7a2b;
    --cta-hover: #ff9152;
    --on-cta: #1a0800;
    --shadow: 0 1px 2px rgb(0 0 0 / 0.5), 0 18px 44px -14px rgb(0 0 0 / 0.75);
  }
}

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

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

@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}

body {
  margin: 0;
  background: var(--page);
  color: var(--text);
  font: 400 1.0625rem/1.6 var(--font);
}

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

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

a:hover {
  text-decoration-thickness: 2px;
}

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

h1,
h2,
h3 {
  line-height: 1.2;
  text-wrap: balance;
}

p,
li,
dd {
  text-wrap: pretty;
}

code,
pre {
  font-family: var(--mono);
  font-size: 0.9em;
}

code {
  padding: 0.1em 0.35em;
  border-radius: 5px;
  background: var(--raised);
  overflow-wrap: anywhere;
}

pre {
  margin: 0 0 1rem;
  padding: 1rem 1.1rem;
  border-radius: 10px;
  background: var(--raised);
  white-space: pre-wrap;
}

pre code {
  padding: 0;
  background: none;
  overflow-wrap: normal;
}

/* Keeps a command-line option on one line when the synopsis wraps. */
.nw {
  white-space: nowrap;
}

figure {
  margin: 0;
}

.wrap {
  width: min(100% - 2rem, 70rem);
  margin-inline: auto;
}

.narrow > * {
  max-width: 46rem;
}

.skip {
  position: absolute;
  top: -4rem;
  left: 1rem;
  z-index: 1;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  background: var(--surface);
}

.skip:focus {
  top: 1rem;
}

/* Header */

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

.bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.25rem 1.5rem;
  padding-block: 0.75rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--text);
  font-size: 1.25rem;
  font-weight: 650;
  text-decoration: none;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0 1.25rem;
}

.site-nav a {
  padding-block: 0.5rem;
  color: var(--text-2);
  font-weight: 500;
  text-decoration: none;
}

.site-nav a:hover {
  color: var(--text);
  text-decoration: underline;
}

/* Hero */

.hero {
  padding-top: clamp(2.5rem, 7vw, 5rem);
  background: radial-gradient(64rem 30rem at 50% -8rem, color-mix(in srgb, var(--brand) 14%, transparent), transparent 70%);
  text-align: center;
}

.eyebrow {
  margin: 0 0 1rem;
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 500;
}

h1 {
  max-width: 17ch;
  margin: 0 auto;
  font-size: clamp(2.25rem, 6vw, 3.75rem);
  font-weight: 750;
  letter-spacing: -0.025em;
}

.lede {
  max-width: 40rem;
  margin: 1.25rem auto 0;
  color: var(--text-2);
  font-size: clamp(1.125rem, 2.2vw, 1.3rem);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
  margin-top: 2rem;
}

.button {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  min-height: 3rem;
  padding: 0.7rem 1.4rem;
  border: 1px solid var(--border-strong);
  border-radius: 10px;
  background: var(--surface);
  color: var(--text);
  font-weight: 600;
  text-decoration: none;
}

.button:hover {
  border-color: var(--muted);
}

.button.primary {
  border-color: var(--cta);
  background: var(--cta);
  color: var(--on-cta);
}

.button.primary:hover {
  border-color: var(--cta-hover);
  background: var(--cta-hover);
}

.fine {
  margin: 1rem auto 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.fine + .fine {
  margin-top: 0.35rem;
}

.shot {
  margin-top: clamp(2.5rem, 6vw, 3.5rem);
}

.shot img {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

/* Sections */

.section {
  padding-block: clamp(3rem, 8vw, 5.5rem);
}

.hero + .section {
  padding-top: clamp(3.5rem, 9vw, 6rem);
}

/* Back-to-back sections on the same background: the first one's bottom padding is gap enough. */
.section:not(.alt) + .section:not(.alt) {
  padding-top: 0;
}

.alt {
  border-block: 1px solid var(--border);
  background: var(--surface);
}

.section h2 {
  margin: 0 0 1rem;
  font-size: clamp(1.6rem, 3.6vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.015em;
}

.section h3 {
  margin: 2rem 0 0.6rem;
  font-size: 1.2rem;
}

.section-lede {
  max-width: 46rem;
  margin: 0 0 1rem;
  color: var(--text-2);
  font-size: 1.15rem;
}

.section-lede:last-of-type {
  margin-bottom: 2rem;
}

.features {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 19rem), 1fr));
  gap: 1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.features li {
  padding: 1.25rem 1.35rem 1.4rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

.features li::before {
  content: "";
  display: block;
  width: 2rem;
  height: 3px;
  margin-bottom: 1rem;
  border-radius: 2px;
  background: var(--ping);
}

.features h3 {
  margin: 0 0 0.4rem;
  font-size: 1.1rem;
}

.features p {
  margin: 0;
  color: var(--text-2);
  font-size: 1rem;
}

.notes {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 19rem), 1fr));
  gap: 1.5rem 2rem;
  margin: 1.5rem 0 0;
}

.notes dt {
  margin-bottom: 0.4rem;
  font-weight: 650;
}

.notes dd {
  margin: 0;
  color: var(--text-2);
}

.privacy {
  display: grid;
  grid-template-columns: minmax(0, 1.7fr) minmax(0, 1fr);
  gap: 2rem 3rem;
  align-items: start;
}

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

.sends li {
  margin-bottom: 0.6rem;
}

.sends ul {
  margin-top: 0.6rem;
  padding-left: 1.25rem;
}

.nothing-else {
  font-size: 1.15rem;
  font-weight: 650;
}

.card {
  padding: 1.25rem 1.4rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--page);
}

.card h3 {
  margin-top: 0;
}

.card p {
  margin: 0;
  color: var(--text-2);
}

.callout {
  padding: 0.9rem 1.1rem;
  border: 1px solid var(--border);
  border-left: 4px solid var(--warning);
  border-radius: 8px;
  background: var(--surface);
}

/* Footer */

.site-footer {
  padding-block: 2.5rem 3rem;
  color: var(--text-2);
  font-size: 0.95rem;
}

.site-footer p {
  max-width: 46rem;
  margin: 0 0 0.75rem;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text);
  font-size: 1.1rem;
  font-weight: 650;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1.5rem;
  padding-top: 0.75rem;
}

/* 404 */

.not-found {
  display: grid;
  justify-items: center;
  min-height: 100vh;
  min-height: 100dvh;
  align-content: center;
  padding-block: 3rem;
  text-align: center;
}

.not-found h1 {
  margin-top: 1.5rem;
  font-size: clamp(1.75rem, 5vw, 2.5rem);
}

.not-found p {
  margin: 1rem 0 0;
  color: var(--text-2);
}

@media (max-width: 720px) {
  .privacy {
    grid-template-columns: minmax(0, 1fr);
  }
}