/* Marble — palette ported from the app's Butter theme (Sources/Theme/Theme.swift)
   so the site and the app read as one product.

   Everything on this page is drawn in CSS and SVG rather than exported as
   images: the product screens stay honest because they're built from the same
   tokens the app uses, and the whole page ships in one request. */

:root {
  --bg: #FFFDF8;
  --card: #FFF9F0;
  --edge: #F5E6D3;
  --line: #E9D6BC;
  --tan: #C4A574;
  --tan-deep: #9A7D4E;
  --sage: #7FA086;
  --ink: #4A4139;
  --muted: #7D6F62;
  --grey: #B8A99A;

  --measure: 34rem;
  --gutter: clamp(1.25rem, 5vw, 2.5rem);

  --display: "Instrument Serif", "Hoefler Text", Georgia, serif;
  --body: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI",
    system-ui, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, monospace;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--body);
  font-size: 1.0625rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

/* Letterspaced caps — the section label, used everywhere instead of a
   paragraph of set-up. */
.label {
  font-size: 0.6875rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 600;
  margin: 0;
}

a { color: var(--tan-deep); text-underline-offset: 0.2em; }
a:focus-visible,
button:focus-visible,
summary:focus-visible,
input:focus-visible {
  outline: 2px solid var(--tan-deep);
  outline-offset: 3px;
  border-radius: 2px;
}

.vh {
  position: absolute; width: 1px; height: 1px;
  overflow: hidden; clip-path: inset(50%); white-space: nowrap;
}

.wrap { max-width: 60rem; margin: 0 auto; padding-inline: var(--gutter); }

.rule { border: 0; border-top: 1px solid var(--edge); margin: 0; }

/* ---------- masthead ---------- */

.masthead { display: flex; align-items: center; gap: 0.625rem; padding-block: 1.5rem; }
.masthead img { width: 30px; height: 30px; border-radius: 7px; }
.masthead .name { font-family: var(--display); font-size: 1.375rem; letter-spacing: 0.01em; }
.masthead nav { margin-left: auto; display: flex; gap: 1.5rem; font-size: 0.9375rem; }
.masthead nav a { color: var(--muted); text-decoration: none; }
.masthead nav a:hover { color: var(--ink); }

/* ---------- hero ---------- */

.hero {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  align-items: center;
  padding-block: clamp(2rem, 6vw, 4.5rem) clamp(3rem, 8vw, 6rem);
}
@media (min-width: 56rem) { .hero { grid-template-columns: 1.15fr 0.85fr; gap: 4rem; } }

/* Light falls from the upper left, the same direction as the highlight on the
   marble, so the type and the mark agree about where the sun is. */
.hero h1 {
  font-family: var(--display);
  font-weight: 400;
  font-size: clamp(2.75rem, 8vw, 4.75rem);
  line-height: 1.02;
  letter-spacing: -0.015em;
  margin: 0.75rem 0 0;
  color: #6E6055;
  text-shadow:
    -1px -1px 0 rgba(74, 65, 57, 0.22),
     1px  1px 0 rgba(255, 255, 255, 0.95);
}
.hero h1 em { font-style: italic; color: var(--tan-deep); text-shadow: none; }

.hero p.lede {
  max-width: var(--measure);
  font-size: 1.1875rem;
  color: var(--muted);
  margin: 1.5rem 0 0;
}

.hero-art {
  margin: 0;
  justify-self: center;
  max-width: 20rem;
  width: 100%;
}
.hero-art img { width: 100%; height: auto; display: block; animation: bob 7s ease-in-out infinite; }

@keyframes bob { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-8px); } }

.cta-row {
  display: flex; flex-wrap: wrap; align-items: center;
  gap: 1rem 1.25rem; margin-top: 2rem;
}
.cta {
  display: inline-block;
  background: var(--ink); color: var(--bg);
  text-decoration: none; font-weight: 600; font-size: 1rem;
  padding: 0.8125rem 1.75rem; border-radius: 999px;
  transition: transform 0.15s ease, background 0.15s ease;
}
.cta:hover { background: #362F29; transform: translateY(-1px); }
.cta-note { font-size: 0.9375rem; color: var(--muted); }

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

.sec { padding-block: clamp(3rem, 7vw, 5rem); }
.sec > h2 {
  font-family: var(--display);
  font-weight: 400;
  font-size: clamp(1.875rem, 4.4vw, 2.75rem);
  line-height: 1.12;
  margin: 0.75rem 0 0;
  letter-spacing: -0.01em;
  max-width: 20ch;
}

/* One short line under a heading is the most prose this page allows itself. */
.fine {
  margin: 1.5rem 0 0;
  max-width: var(--measure);
  color: var(--muted);
  font-size: 0.9375rem;
}

.reveal { opacity: 0; transform: translateY(12px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ---------- shared chart vocabulary ---------- */

svg .grid line { stroke: var(--line); }
svg .dots circle { fill: var(--grey); transition: opacity 0.5s ease; }
svg .rings circle { fill: none; stroke: #D4A574; stroke-width: 2; transition: opacity 0.5s ease; }
svg .trend {
  fill: none; stroke: var(--tan); stroke-width: 3.5;
  stroke-linecap: round; stroke-linejoin: round;
  transition: stroke-width 0.4s ease, opacity 0.5s ease;
}
svg .plan { fill: none; stroke: var(--grey); stroke-width: 2; stroke-dasharray: 5 7; }
/* Axis and legend labels live in HTML, not in the SVG: text inside a viewBox
   scales with it, and on a phone these would render at about five pixels. */
.axis, .legend {
  display: flex; margin-top: 0.75rem;
  font-family: var(--mono); font-size: 0.6875rem;
  letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted);
}
.axis { justify-content: space-between; }
.legend { gap: 1.25rem; }
.legend .key { display: inline-flex; align-items: center; gap: 0.5rem; }
.legend .key::before {
  content: ""; width: 1.5rem; height: 3px; flex: none;
  border-radius: 2px; background: var(--tan);
}
/* A dashed border at this size renders almost solid, so the dash is painted. */
.legend .plan-key::before {
  height: 2px;
  background: repeating-linear-gradient(
    to right, var(--grey) 0 4px, transparent 4px 8px);
}

/* ---------- segmented switch ---------- */

.switch {
  display: inline-flex; flex-wrap: wrap; max-width: 100%;
  margin-top: 1.75rem;
  padding: 0.25rem;
  background: var(--card);
  border: 1px solid var(--edge);
  border-radius: 999px;
}
.switch button {
  appearance: none; border: 0; background: transparent; cursor: pointer;
  font: inherit; font-size: 0.9375rem; font-weight: 600; color: var(--muted);
  padding: 0.5rem 1.125rem; border-radius: 999px;
  transition: background 0.2s ease, color 0.2s ease;
}
.switch button:hover { color: var(--ink); }
.switch button[aria-pressed="true"] {
  background: var(--ink); color: var(--bg);
}

/* ---------- the 28-day figure ---------- */

.figure {
  margin: 1.5rem 0 0;
  background: var(--card);
  border: 1px solid var(--edge);
  border-radius: 16px;
  padding: clamp(1.25rem, 4vw, 2rem);
}
.figure svg { display: block; width: 100%; height: auto; overflow: visible; }
.figure figcaption { margin-top: 1.25rem; color: var(--muted); font-size: 0.9375rem; }
.figure figcaption b { color: var(--ink); font-weight: 600; }

/* The toggle has to do something in both directions: showing the scale pushes
   the line back to a ghost, so the dots lead; showing the trend fades the dots
   out rather than deleting them, so it stays obvious that the line was always
   the same line and only the noise went away. */
.figure[data-view="raw"] .trend { opacity: 0.3; }
.figure[data-view="trend"] .dots circle,
.figure[data-view="trend"] .rings circle { opacity: 0; }
.figure[data-view="trend"] .trend { stroke-width: 4.5; }

/* ---------- the correction lab ---------- */

.lab {
  margin-top: 1.75rem;
  background: var(--card);
  border: 1px solid var(--edge);
  border-radius: 16px;
  padding: clamp(1.25rem, 4vw, 2rem);
}

.readout {
  display: flex; flex-wrap: wrap; align-items: flex-end;
  justify-content: space-between; gap: 1.25rem 2rem;
}

.kpi { display: flex; align-items: baseline; flex-wrap: wrap; gap: 0.5rem 0.625rem; }
.kpi-n {
  font-size: clamp(2.5rem, 7vw, 3.5rem); font-weight: 700;
  letter-spacing: -0.03em; line-height: 1;
  font-variant-numeric: tabular-nums;
  transition: color 0.4s ease;
}
.kpi-n.moved { color: var(--tan-deep); }
.kpi-u { color: var(--muted); font-size: 0.9375rem; }

.badge {
  font-size: 0.6875rem; letter-spacing: 0.14em; text-transform: uppercase;
  font-weight: 700; padding: 0.25rem 0.625rem; border-radius: 999px;
  border: 1px solid var(--line); color: var(--muted); background: var(--bg);
  transition: background 0.4s ease, color 0.4s ease, border-color 0.4s ease;
}
.badge[data-state="meas"] {
  background: var(--sage); border-color: var(--sage); color: #fff;
}

.stats { display: flex; gap: 1.5rem 2rem; flex-wrap: wrap; margin: 0; }
.stats dt {
  font-size: 0.6875rem; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--muted); font-weight: 600;
}
.stats dd {
  margin: 0.125rem 0 0; font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.lab-chart { display: block; width: 100%; height: auto; margin-top: 1.5rem; overflow: visible; }
.lab-chart .dots circle { transition: none; }

.scrub { display: block; margin-top: 0.75rem; }
.scrub input {
  appearance: none; -webkit-appearance: none;
  width: 100%; background: transparent; cursor: grab; margin: 0;
}
.scrub input:active { cursor: grabbing; }
.scrub input::-webkit-slider-runnable-track {
  height: 4px; border-radius: 2px; background: var(--line);
}
.scrub input::-moz-range-track { height: 4px; border-radius: 2px; background: var(--line); }
.scrub input::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 22px; height: 22px; margin-top: -9px;
  border-radius: 50%; background: var(--tan);
  border: 3px solid var(--bg);
  box-shadow: 0 2px 8px -1px rgba(74, 65, 57, 0.45);
}
.scrub input::-moz-range-thumb {
  width: 22px; height: 22px; border-radius: 50%; background: var(--tan);
  border: 3px solid var(--bg); box-shadow: 0 2px 8px -1px rgba(74, 65, 57, 0.45);
}

.lab-note {
  margin: 1.25rem 0 0; color: var(--muted);
  font-size: 0.9375rem; min-height: 3.1em;
}

/* ---------- the screens ---------- */

.tabs {
  display: inline-flex; flex-wrap: wrap; max-width: 100%;
  margin-top: 1.75rem; padding: 0.25rem;
  background: var(--card); border: 1px solid var(--edge); border-radius: 999px;
}
.tabs button {
  appearance: none; border: 0; background: transparent; cursor: pointer;
  font: inherit; font-size: 0.9375rem; font-weight: 600; color: var(--muted);
  padding: 0.5rem 1.25rem; border-radius: 999px;
  transition: background 0.2s ease, color 0.2s ease;
}
.tabs button:hover { color: var(--ink); }
.tabs button[aria-selected="true"] { background: var(--ink); color: var(--bg); }

.stage { display: flex; justify-content: center; margin-top: 2.5rem; }
.pane[hidden] { display: none; }
.pane { width: 100%; max-width: 18rem; animation: rise 0.35s ease both; }
@keyframes rise { from { opacity: 0; transform: translateY(10px); } }

.stage-cap {
  margin: 1.5rem auto 0; max-width: 30rem; text-align: center;
  color: var(--muted); font-size: 0.9375rem;
}

.screen {
  position: relative;
  aspect-ratio: 272 / 560;
  background: var(--bg);
  border: 1px solid var(--edge);
  border-radius: 26px;
  box-shadow: 0 22px 48px -24px rgba(74, 65, 57, 0.5);
  padding: 1.75rem 1rem 1rem;
  display: flex; flex-direction: column; overflow: hidden;
  font-size: 0.625rem; line-height: 1.45;
}
.screen::before {
  content: "";
  position: absolute; top: 0.5rem; left: 50%; transform: translateX(-50%);
  width: 3.75rem; height: 0.9rem;
  background: var(--ink); opacity: 0.85; border-radius: 0.5rem;
}
.screen .cap {
  font-size: 0.5rem; letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--muted); font-weight: 600;
}
.screen .big {
  font-size: 2rem; font-weight: 700; letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums; line-height: 1;
}
.screen .row { display: flex; align-items: center; gap: 0.5rem; }
.screen .sb { justify-content: space-between; }
.screen .dim { color: var(--muted); }
.screen .sep { height: 1px; background: var(--line); margin-block: 0.75rem; }
.screen .track { height: 5px; border-radius: 3px; background: #EFE0CA; overflow: hidden; }
.screen .track i { display: block; height: 100%; background: var(--tan); }
.screen .meal { display: flex; align-items: center; gap: 0.5rem; padding-block: 0.4rem;
                border-bottom: 1px solid var(--line); }
.screen .meal:last-child { border-bottom: 0; }
.screen .thumb { width: 1.4rem; height: 1.4rem; border-radius: 0.35rem;
                 background: var(--edge); flex: none; }
.screen .push { flex: 1; }
.screen .pill {
  background: var(--tan); color: #fff; border-radius: 0.6rem;
  padding: 0.55rem; text-align: center; font-weight: 700; font-size: 0.5625rem;
}
.screen .bubble {
  background: var(--card); border: 1px solid var(--line); border-radius: 0.7rem;
  padding: 0.5rem 0.6rem; margin-top: 0.4rem; max-width: 92%;
}
.screen .bubble.me { background: var(--tan); color: #fff; border: 0; margin-left: auto; }
.screen svg { display: block; width: 100%; height: auto; }
.screen svg .trend { stroke-width: 2.4; }

/* ---------- the receipt ---------- */

.receipt {
  margin: 1.75rem 0 0;
  max-width: 27rem;
  background: var(--card);
  border: 1px solid var(--edge);
  border-radius: 14px;
  padding: 1.25rem 1.5rem;
  font-variant-numeric: tabular-nums;
}
.receipt div { display: flex; justify-content: space-between; padding-block: 0.4rem; }
.receipt .soft { color: var(--muted); font-size: 0.9375rem; }
.receipt .lit {
  background: rgba(212, 165, 116, 0.22); border-radius: 5px;
  margin-inline: -0.4rem; padding-inline: 0.4rem; color: var(--ink);
}
.receipt .tot { border-top: 1px solid var(--edge); margin-top: 0.4rem;
                padding-top: 0.7rem; font-weight: 700; }
.receipt figcaption {
  margin-top: 1.125rem; padding-top: 1rem; border-top: 1px solid var(--edge);
  color: var(--muted); font-size: 0.875rem; line-height: 1.55;
}

/* ---------- chips ---------- */

.chips {
  list-style: none; margin: 2rem 0 0; padding: 0;
  display: flex; flex-wrap: wrap; gap: 0.625rem;
}
.chips li {
  border: 1px solid var(--edge); background: var(--card);
  border-radius: 999px; padding: 0.5rem 1rem;
  font-size: 0.9375rem; font-weight: 600;
}
.chips li::before { content: "✓ "; color: var(--sage); }

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

.faq { margin-top: 2rem; border-top: 1px solid var(--edge); }
.faq details { border-bottom: 1px solid var(--edge); }
.faq summary {
  cursor: pointer; padding-block: 1.125rem; font-weight: 600;
  list-style: none; display: flex; align-items: center; gap: 1rem;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+"; margin-left: auto; color: var(--tan-deep);
  font-size: 1.25rem; line-height: 1; font-weight: 400;
}
.faq details[open] summary::after { content: "−"; }
.faq details p { margin: 0 0 1.25rem; color: var(--muted); max-width: 46rem; }

/* ---------- closing call to action ---------- */

.closer {
  text-align: center;
  padding-block: clamp(3.5rem, 8vw, 5.5rem);
  border-top: 1px solid var(--edge);
}
.closer h2 {
  font-family: var(--display); font-weight: 400;
  font-size: clamp(2rem, 5vw, 3rem); line-height: 1.12;
  margin: 0; letter-spacing: -0.01em;
}
.closer p { color: var(--muted); margin: 1rem auto 0; max-width: 34rem; }
.closer .cta-row { justify-content: center; }

/* ---------- footer ---------- */

.site-footer {
  border-top: 1px solid var(--edge);
  padding-block: 2rem 3rem;
  display: flex; flex-wrap: wrap; gap: 0.75rem 1.75rem; align-items: center;
  font-size: 0.9375rem; color: var(--muted);
}
.site-footer a { color: var(--muted); }
.site-footer .spacer { margin-left: auto; }

/* ---------- document pages (privacy, support) ---------- */

.doc { max-width: 44rem; padding-block: 1rem 4rem; }
.doc h1 {
  font-family: var(--display); font-weight: 400;
  font-size: clamp(2.25rem, 6vw, 3rem);
  letter-spacing: -0.015em; margin: 0.5rem 0 0.5rem;
}
.doc .updated { color: var(--muted); font-size: 0.9375rem; margin: 0 0 2.5rem; }
.doc h2 {
  font-family: var(--display); font-weight: 400; font-size: 1.5rem;
  letter-spacing: -0.005em; margin: 2.75rem 0 0.75rem;
}
.doc h3 { font-size: 1rem; margin: 1.75rem 0 0.5rem; }
.doc p, .doc li { color: #5A5047; }
.doc ul { padding-left: 1.125rem; }
.doc li { margin-bottom: 0.5rem; }
.doc li strong { color: var(--ink); }

.callout {
  background: var(--card); border: 1px solid var(--edge);
  border-radius: 12px; padding: 1.25rem 1.375rem; margin: 2rem 0;
}
.callout p { margin: 0; }
.callout p + p { margin-top: 0.75rem; }

/* Motion is decoration here — every state the animations reach is also
   reachable by tapping, so switching them off costs nothing. */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }
  .reveal { opacity: 1; transform: none; }
}