/* OpenFugu shared stylesheet. Palette: a water column (surface light to
   depth dark) with dive-light cyan for data and buoy orange as accent. */

:root {
  color-scheme: light dark;

  --bg-0: #fbfdfe;
  --bg-1: #e4eef3;
  --ink: #122b3d;
  --muted: #4d6b7e;
  --accent: #bc4a10;
  --trace: #2f7590;
  --peak: #e05a1f;
  --line: rgba(18, 43, 61, 0.16);
  --btn-bg: #122b3d;
  --btn-ink: #f4fafd;

  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue",
    Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas,
    "Liberation Mono", monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-0: #0d1b29;
    --bg-1: #050c14;
    --ink: #e4eff5;
    --muted: #8da9ba;
    --accent: #ff8a5c;
    --trace: #4ec4de;
    --peak: #ff8a5c;
    --line: rgba(228, 239, 245, 0.18);
    --btn-bg: #e4eff5;
    --btn-ink: #0d1b29;
  }
}

* {
  box-sizing: border-box;
}

html {
  background: var(--bg-1);
}

body {
  margin: 0;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  background: linear-gradient(180deg, var(--bg-0), var(--bg-1));
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

::selection {
  background: var(--trace);
  color: var(--bg-0);
}

.wrap {
  width: 100%;
  max-width: 42rem;
  margin-inline: auto;
  padding-inline: 1.25rem;
}

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}

a:focus-visible,
.btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}

.mono {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.mono a {
  color: var(--muted);
}

.mono a:hover {
  color: var(--ink);
}

/* Header and footer */

.site-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding-block: 1.4rem;
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-weight: 700;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -0.01em;
}

.wordmark img {
  display: block;
}

.site-head nav,
.site-foot nav {
  display: flex;
  gap: 1.25rem;
}

.site-foot {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  border-top: 1px solid var(--line);
  padding-block: 1.6rem;
}

main {
  padding-bottom: 4rem;
}

/* Landing page */

.hero {
  margin-top: clamp(3.5rem, 12vh, 7rem);
}

.hero .mark {
  display: block;
  margin-bottom: 1.5rem;
}

.eyebrow {
  margin: 0 0 1rem;
}

.subtitle {
  margin: 1.1rem 0 0;
}

.hero h1 {
  margin: 0;
  font-size: clamp(3rem, 11vw, 4.75rem);
  font-weight: 800;
  letter-spacing: -0.035em;
  line-height: 1;
}

.lede {
  margin: 1.4rem 0 0;
  font-size: 1.15rem;
  max-width: 34em;
  color: var(--muted);
}

.lede strong {
  color: var(--ink);
  font-weight: 600;
}

/* Justified prose for the longer text blocks; narrow columns (feature
   cards) stay ragged to avoid rivers. */
.lede,
.small-print,
.doc p,
.doc li {
  text-align: justify;
  -webkit-hyphens: auto;
  hyphens: auto;
}

/* Signature: an equalization pressure trace, as the app records it */

.trace {
  margin: 3.25rem 0 0;
}

.trace svg {
  display: block;
  width: 100%;
  height: auto;
}

.trace path {
  stroke: var(--trace);
  stroke-dasharray: 1000;
  stroke-dashoffset: 1000;
  animation: trace-draw 1.8s 0.2s ease-out forwards;
}

.trace circle {
  fill: var(--peak);
  opacity: 0;
  animation: trace-peaks 0.5s 1.7s ease-out forwards;
}

@keyframes trace-draw {
  to {
    stroke-dashoffset: 0;
  }
}

@keyframes trace-peaks {
  to {
    opacity: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .trace path {
    animation: none;
    stroke-dashoffset: 0;
  }

  .trace circle {
    animation: none;
    opacity: 1;
  }
}

.actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  margin: 2.75rem 0 0;
}

.btn {
  background: var(--btn-bg);
  color: var(--btn-ink);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.7rem 1.25rem;
  border-radius: 8px;
}

.btn:hover {
  filter: brightness(1.12);
}

.chip {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.55rem 1rem;
}

.facts {
  display: grid;
  gap: 1.75rem;
  margin: 4rem 0 0;
  padding-top: 2.25rem;
  border-top: 1px solid var(--line);
}

@media (min-width: 40rem) {
  .facts {
    grid-template-columns: repeat(3, 1fr);
  }
}

.facts dt {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.facts dd {
  margin: 0.5rem 0 0;
  font-size: 0.9rem;
  color: var(--muted);
}

.small-print {
  margin: 0;
  max-width: 46em;
  font-size: 0.8rem;
  color: var(--muted);
  opacity: 0.7;
}

/* Privacy policy page */

.doc {
  margin-top: clamp(2rem, 7vh, 4rem);
}

.doc h1 {
  margin: 0.75rem 0 0;
  font-size: clamp(1.9rem, 6vw, 2.6rem);
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 1.15;
}

.doc h2 {
  margin: 2.4em 0 0;
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.doc p,
.doc ul {
  margin: 0.9em 0 0;
}

.doc .lede {
  margin-top: 1.6rem;
}

.doc li {
  margin-top: 0.4em;
}

.doc code {
  font-family: var(--mono);
  font-size: 0.85em;
  background: var(--line);
  border-radius: 4px;
  padding: 0.1em 0.35em;
}

@media print {
  body {
    background: #fff;
    color: #000;
  }

  .site-head nav,
  .site-foot {
    display: none;
  }
}