/* HelloGem — hellogem.ai
   Mobile-first. System fonts only. No external requests. */

:root {
  --paper: #f7faf8;
  --surface: #ffffff;
  --ink: #16342c;
  --ink-soft: #2b473f;
  --muted: #4f655d;
  --accent: #14715a;
  --mint: #93dec1;
  --mint-soft: #e1f2eb;
  --line: #dce7e2;
  --code-bg: #11271f;
  --code-ink: #eef5f1;
  --code-key: #93dec1;

  --serif: ui-serif, "New York", "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --sans: "Avenir Next", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;

  --gutter: clamp(1.25rem, 5vw, 3rem);
  --measure: 38rem;
  --radius: 14px;

  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #0e1d18;
    --surface: #132620;
    --ink: #e7f2ed;
    --ink-soft: #cfe1d9;
    --muted: #a6bfb4;
    --accent: #93dec1;
    --mint: #93dec1;
    --mint-soft: #1c3b31;
    --line: #26413a;
    --code-bg: #0a1713;
  }
}

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-padding-top: 1rem;
}

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 400 1.0625rem/1.6 var(--sans);
  font-kerning: normal;
  text-rendering: optimizeLegibility;
}

@media (min-width: 48rem) {
  body { font-size: 1.125rem; }
}

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

a { color: var(--accent); text-underline-offset: 0.18em; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }

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

h1, h2, h3 {
  font-family: var(--serif);
  font-weight: 600;
  line-height: 1.12;
  letter-spacing: -0.01em;
  margin: 0;
  text-wrap: balance;
}

p { margin: 0; text-wrap: pretty; }

code, kbd, samp, pre { font-family: var(--mono); font-size: 0.92em; }

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
}

.skip-link {
  position: absolute;
  left: var(--gutter);
  top: -4rem;
  padding: 0.6rem 1rem;
  background: var(--ink);
  color: var(--paper);
  border-radius: 8px;
  z-index: 10;
}
.skip-link:focus { top: 1rem; }

.wrap {
  width: 100%;
  max-width: 72rem;
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ------------------------------------------------------------ header */

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

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 4.25rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--ink);
  font-weight: 600;
  font-size: 1.125rem;
  text-decoration: none;
}
.brand img { width: 32px; height: 32px; border-radius: 8px; }

.site-nav ul {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav a {
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 0.97rem;
}
.site-nav a:hover { color: var(--accent); text-decoration: underline; }
.site-nav a[aria-current="page"] { color: var(--accent); }

/* Only the Get HelloGem link shows on small screens; the footer carries the rest. */
.site-nav .wide { display: none; }
@media (min-width: 52rem) {
  .site-nav .wide { display: list-item; }
}

.site-nav .nav-cta {
  display: inline-flex;
  align-items: center;
  min-height: 2.75rem;
  padding: 0.45rem 1.1rem;
  border: 1px solid var(--ink);
  border-radius: 999px;
  color: var(--ink);
  font-weight: 600;
}
.site-nav .nav-cta:hover { background: var(--ink); color: var(--paper); text-decoration: none; }

/* ------------------------------------------------------------ type helpers */

.eyebrow {
  font-family: var(--sans);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}

.lede {
  font-size: 1.15rem;
  line-height: 1.55;
  color: var(--ink-soft);
  max-width: var(--measure);
}
@media (min-width: 48rem) { .lede { font-size: 1.3rem; } }

.muted { color: var(--muted); }
.small { font-size: 0.92rem; }

/* ------------------------------------------------------------ buttons */

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0.7rem 1.35rem;
  border-radius: 999px;
  border: 1px solid var(--ink);
  font: 600 1rem/1.2 var(--sans);
  text-decoration: none;
  cursor: pointer;
}
.button--primary { background: var(--ink); color: var(--paper); }
.button--primary:hover { background: var(--accent); border-color: var(--accent); color: #fff; }
.button--quiet { background: transparent; color: var(--ink); }
.button--quiet:hover { background: var(--mint-soft); }

@media (prefers-color-scheme: dark) {
  .button--primary { background: var(--mint); border-color: var(--mint); color: #0e1d18; }
  .button--primary:hover { background: #b8ecd8; border-color: #b8ecd8; color: #0e1d18; }
  .button--quiet { border-color: var(--ink-soft); }
}

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

.section {
  padding-block: clamp(3.5rem, 9vw, 6.5rem);
  border-top: 1px solid var(--line);
}

.section-head {
  display: grid;
  gap: 0.9rem;
  max-width: 44rem;
  margin-bottom: clamp(2rem, 5vw, 3rem);
}
.section-head h2 { font-size: clamp(1.9rem, 1.4rem + 2.4vw, 2.9rem); }
.section-head--tight { margin-bottom: 0; }

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

.hero {
  padding-block: clamp(2.75rem, 8vw, 6rem) clamp(3.5rem, 9vw, 6.5rem);
}

.hero .wrap {
  display: grid;
  gap: clamp(2.5rem, 6vw, 4.5rem);
  align-items: center;
}

@media (min-width: 60rem) {
  .hero { padding-block: 2.25rem 4.5rem; }
  .hero .wrap { grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr); gap: 4rem; }
  .hero-copy { gap: 1.25rem; }
  .hero h1 { font-size: clamp(3rem, 2rem + 1.9vw, 3.7rem); line-height: 1.06; }
  .hero .lede { font-size: 1.2rem; }
}

.hero-copy { display: grid; gap: 1.5rem; }

.hero h1 {
  font-size: clamp(2.45rem, 1.5rem + 4.6vw, 4.4rem);
  line-height: 1.04;
  letter-spacing: -0.02em;
}

.status-note {
  display: flex;
  gap: 0.6rem;
  align-items: baseline;
  font-size: 0.95rem;
  color: var(--muted);
  max-width: var(--measure);
}
.status-note::before {
  content: "";
  flex: none;
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  border: 2px solid var(--accent);
  transform: translateY(-0.05rem);
}

/* ------------------------------------------------------------ answer */
/* One explanation, written from one real result. Each sentence carries its
   speaker in the margin: a dot for reference databases, an open quote for a
   source speaking in its own words. Not a chat window. */

.answer {
  margin: 0;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 1px 0 rgba(22, 52, 44, 0.04), 0 18px 40px -28px rgba(22, 52, 44, 0.35);
  overflow: hidden;
}

.answer__head {
  display: grid;
  gap: 0.2rem;
  padding: 1.2rem 1.4rem 1rem;
  border-bottom: 1px solid var(--line);
}

.answer__ask {
  font-size: 0.92rem;
  color: var(--muted);
}
.answer__ask q { quotes: "“" "”"; color: var(--ink-soft); }

.answer__name {
  font-family: var(--serif);
  font-size: 1.85rem;
  font-weight: 600;
  line-height: 1.15;
}

.answer__aka { font-size: 0.92rem; color: var(--muted); }

.answer__body {
  display: grid;
  gap: 1.05rem;
  padding: 1.2rem 1.4rem 1.35rem;
}

.said {
  display: grid;
  grid-template-columns: 1.4rem 1fr;
  column-gap: 0.5rem;
  row-gap: 0.15rem;
  margin: 0;
}
.said::before {
  content: "";
  grid-row: span 2;
  justify-self: center;
  width: 0.6rem;
  height: 0.6rem;
  margin-top: 0.45rem;
  border-radius: 50%;
  background: var(--accent);
}
.said--quoted::before {
  content: "“";
  content: "“" / "";
  width: auto;
  height: auto;
  margin-top: -0.35rem;
  border-radius: 0;
  background: none;
  font-family: var(--serif);
  font-size: 2rem;
  line-height: 1;
  color: var(--accent);
}
.said__who {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
}
.said__who span { color: var(--muted); font-weight: 500; letter-spacing: 0.04em; }
.said__what { color: var(--ink); line-height: 1.55; }
.said__what q { quotes: "“" "”"; }

.answer figcaption {
  display: grid;
  gap: 0.55rem;
  padding: 0.95rem 1.4rem 1.1rem;
  background: var(--mint-soft);
  font-size: 0.88rem;
  color: var(--ink-soft);
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.25rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.legend li { display: inline-flex; align-items: center; gap: 0.45rem; }
.legend .dot {
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: var(--accent);
}
.legend .quote {
  font-family: var(--serif);
  font-size: 1.35rem;
  line-height: 0.6;
  color: var(--accent);
  transform: translateY(0.2rem);
}

/* ------------------------------------------------------------ questions */

.questions {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}
.questions li {
  padding-block: 1.05rem;
  border-bottom: 1px solid var(--line);
  font-family: var(--serif);
  font-size: clamp(1.2rem, 1.05rem + 0.8vw, 1.55rem);
  line-height: 1.3;
}
.questions q { quotes: "“" "”"; }

@media (min-width: 52rem) {
  .questions { grid-template-columns: 1fr 1fr; column-gap: 3rem; }
}

/* ------------------------------------------------------------ principles */

.principles {
  display: grid;
  gap: clamp(2rem, 5vw, 2.75rem);
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: principle;
}

.principles > li {
  display: grid;
  gap: 0.6rem;
  counter-increment: principle;
  padding-top: 1.25rem;
  border-top: 2px solid var(--ink);
}
.principles > li::before {
  content: counter(principle, decimal-leading-zero);
  content: counter(principle, decimal-leading-zero) / "";
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--accent);
}
.principles h3 { font-size: 1.45rem; }
.principles .example {
  margin-top: 0.35rem;
  padding: 0.75rem 0.9rem;
  border-left: 3px solid var(--mint);
  background: var(--surface);
  font-size: 0.95rem;
  color: var(--ink-soft);
  overflow-wrap: break-word; /* long INCI names such as PEG crosspolymers */
}
.principles .example code { white-space: nowrap; }

@media (min-width: 56rem) {
  .principles { grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: 3rem; }
}

/* ------------------------------------------------------------ coverage */

.coverage {
  display: grid;
  gap: 1.75rem;
  margin: 0;
}

.coverage > div { display: grid; gap: 0.5rem; }

.coverage dt {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 0.75rem;
  align-items: baseline;
}

.coverage .figure {
  font-family: var(--serif);
  font-size: clamp(1.9rem, 1.5rem + 2vw, 2.6rem);
  font-weight: 600;
  font-variant-numeric: tabular-nums lining-nums;
  line-height: 1;
}
.coverage .label { color: var(--ink-soft); }
.coverage dd { margin: 0; color: var(--muted); font-size: 0.95rem; max-width: var(--measure); }
.coverage > div { padding-bottom: 1.25rem; border-bottom: 1px solid var(--line); }

.coverage-notes {
  display: grid;
  gap: 0.6rem;
  max-width: var(--measure);
  margin-top: 1.75rem;
  color: var(--muted);
  font-size: 0.97rem;
}

.release-layout {
  display: grid;
  gap: 3rem;
}
@media (min-width: 60rem) {
  .release-layout { grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr); gap: 4.5rem; align-items: start; }
}

.scope {
  display: grid;
  gap: 1rem;
  padding-top: 1.25rem;
  border-top: 2px solid var(--ink);
}
.scope h3 { font-size: 1.45rem; }

/* ------------------------------------------------------------ limits */

.limits {
  display: grid;
  gap: 1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.limits li {
  display: grid;
  grid-template-columns: 1.5rem 1fr;
  gap: 0.5rem;
  max-width: var(--measure);
}
.limits li::before {
  content: "—";
  color: var(--accent);
}

/* ------------------------------------------------------------ video */

.video-frame {
  margin: 0;
  display: grid;
  gap: 0.85rem;
}
.video-frame video {
  width: 100%;
  aspect-ratio: 16 / 9;
  background: var(--code-bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.video-frame figcaption { color: var(--muted); font-size: 0.95rem; }

/* ------------------------------------------------------------ connect */

.connect {
  display: grid;
  gap: 2rem;
}
@media (min-width: 60rem) {
  .connect { grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr); gap: 4rem; align-items: start; }
}

.steps {
  display: grid;
  gap: 1.35rem;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
}
.steps > li {
  display: grid;
  grid-template-columns: 2.25rem 1fr;
  gap: 0.25rem 0.9rem;
  counter-increment: step;
}
.steps > li::before {
  content: counter(step);
  content: counter(step) / "";
  grid-row: span 2;
  display: grid;
  place-items: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 50%;
  background: var(--mint-soft);
  color: var(--accent);
  font-weight: 600;
}
.steps > li > * { grid-column: 2; }

.after-steps { margin-top: 1.5rem; }
.after-steps + p { margin-top: 0.6rem; }

/* ------------------------------------------------------------ feedback/privacy */

.split {
  display: grid;
  gap: 1.25rem;
  max-width: 52rem;
}
.split p { max-width: var(--measure); }

/* ------------------------------------------------------------ docs pages */

.page-head {
  padding-block: clamp(2.5rem, 7vw, 4.5rem) clamp(1.5rem, 4vw, 2.5rem);
  display: grid;
  gap: 1rem;
}
.page-head h1 { font-size: clamp(2.2rem, 1.5rem + 3.4vw, 3.6rem); }

.doc {
  display: grid;
  gap: 1.1rem;
  padding-bottom: clamp(3.5rem, 9vw, 6rem);
  max-width: 46rem;
}
.doc h2 {
  font-size: clamp(1.55rem, 1.3rem + 1.2vw, 2rem);
  margin-top: 2.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
}
.doc h3 { font-size: 1.25rem; margin-top: 1rem; }
.doc ul, .doc ol { margin: 0; padding-left: 1.25rem; display: grid; gap: 0.45rem; }
.doc .steps { padding-left: 0; gap: 1.1rem; }
.doc dl { margin: 0; display: grid; gap: 0.9rem; }
.doc dt { font-family: var(--mono); font-size: 0.92rem; color: var(--accent); }
.doc dd { margin: 0.15rem 0 0; }
.doc :not(pre) > code {
  padding: 0.08em 0.35em;
  border-radius: 5px;
  background: var(--mint-soft);
  color: var(--ink);
  overflow-wrap: anywhere;
}

pre.code {
  margin: 0;
  padding: 1.1rem 1.2rem;
  border-radius: 12px;
  background: var(--code-bg);
  color: var(--code-ink);
  font-size: 0.86rem;
  line-height: 1.55;
  overflow-x: auto;
  tab-size: 2;
}
pre.code .k { color: var(--code-key); }
pre.code .c { color: #8fb3a6; }

.code-caption { font-size: 0.9rem; color: var(--muted); margin-top: -0.4rem; }

.table-scroll { overflow-x: auto; }
.doc table { border-collapse: collapse; width: 100%; font-size: 0.95rem; }
.doc th, .doc td { text-align: left; vertical-align: top; padding: 0.6rem 0.75rem 0.6rem 0; border-bottom: 1px solid var(--line); }
.doc th { font-weight: 600; }

.transcript { display: grid; gap: 0; margin: 0; padding: 0; list-style: none; }
.transcript > li {
  display: grid;
  gap: 0.4rem;
  padding-block: 1.25rem;
  border-top: 1px solid var(--line);
}
@media (min-width: 48rem) {
  .transcript > li { grid-template-columns: 6.5rem 1fr; gap: 1.5rem; }
}
.transcript time { font-family: var(--mono); font-size: 0.88rem; color: var(--accent); padding-top: 0.2rem; }
.transcript h3 { font-size: 1.3rem; margin: 0 0 0.35rem; }
.transcript p + p { margin-top: 0.5rem; }

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

.site-footer {
  border-top: 1px solid var(--line);
  padding-block: 3rem 2.5rem;
  font-size: 0.95rem;
}

.footer-grid {
  display: grid;
  gap: 2rem;
}
@media (min-width: 48rem) {
  .footer-grid { grid-template-columns: 1.4fr repeat(3, 1fr); gap: 2.5rem; }
}

.footer-grid h2 {
  font-family: var(--sans);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.75rem;
}
.footer-grid ul { margin: 0; padding: 0; list-style: none; display: grid; gap: 0.45rem; }
.footer-grid a { color: var(--ink-soft); text-decoration: none; }
.footer-grid a:hover { color: var(--accent); text-decoration: underline; }
.footer-tagline { margin-top: 0.75rem; }

.footer-note {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
  display: grid;
  gap: 0.4rem;
  color: var(--muted);
  font-size: 0.88rem;
}