/* permachro.me
 *
 * The application's own palette (deltachrome_ui/theme.py): the dark ground it
 * is used on, its one accent, and its five status tones for verdict words.
 * The ramp appears on the mark and nowhere else -- the same rule the
 * application keeps -- because it begins at a red close enough to FAIL that
 * anything else wearing it would say something it does not mean.
 */

:root {
  --bg: #1a1a1d;
  --bg-raised: #232327;
  --bg-sunk: #141416;
  --border: #33333a;
  --text: #e6e6ea;
  --text-dim: #9a9aa4;
  --text-spent: #54545e;
  --accent: #ffd600;
  --on-accent: #1a1a1d;
  --pass: #7ee08a;   --pass-bg: #1d3524;
  --fail: #ff6050;   --fail-bg: #3a1f1c;
  --qualified: #ffc44d; --qualified-bg: #3a2f18;
  --absent: #8a8a94; --absent-bg: #26262b;
  --unknown: #8fb8ff; --unknown-bg: #1e2738;
  --heading: "Helvetica Neue", Helvetica, Arial, sans-serif;
  --body: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --measure: 44rem;
  color-scheme: dark;
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg: #f6f6f4;
    --bg-raised: #ffffff;
    --bg-sunk: #ececea;
    --border: #d9d9d6;
    --text: #1a1a1d;
    --text-dim: #5f5f68;
    --text-spent: #b4b4ba;
    --accent: #1a1a1d;
    --on-accent: #ffd600;
    --pass: #1f7a32;   --pass-bg: #e2f3e5;
    --fail: #c0291a;   --fail-bg: #fbe6e3;
    --qualified: #8a5a00; --qualified-bg: #fbf0d6;
    --absent: #6a6a72; --absent-bg: #ececec;
    --unknown: #2457b3; --unknown-bg: #e4ecfb;
    color-scheme: light;
  }
}

*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: 5rem; scrollbar-gutter: stable; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 var(--body);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
main { flex: 1; }
a { color: inherit; text-underline-offset: 0.2em; text-decoration-color: var(--text-spent); }
a:hover { text-decoration-color: currentColor; }
h1, h2, h3 { font-family: var(--heading); font-weight: 700; line-height: 1.2; letter-spacing: -0.01em; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.wrap { max-width: 72rem; margin: 0 auto; padding: 0 16px; }
@media (min-width: 640px) { .wrap { padding: 0 32px; } }

.eyebrow {
  margin: 0 0 0.25rem;
  font: 600 0.75rem/1 var(--body);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-dim);
}
.lede { font-size: 1.125rem; color: var(--text-dim); max-width: var(--measure); }

/* --- Bar ---------------------------------------------------------------- */

header.site {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.bar { display: flex; align-items: center; justify-content: space-between; height: 52px; gap: 1rem; padding-left: 24px; }
@media (max-width: 560px) { .bar { padding-left: 16px; } }
.brand { display: flex; align-items: center; gap: 0.6rem; text-decoration: none; font: 700 1.05rem var(--heading); }
.bar nav { display: flex; align-items: stretch; height: 100%; }
.bar nav a {
  display: flex; align-items: center; padding: 0 0.85rem;
  text-decoration: none; color: var(--text-dim); font-size: 0.925rem;
  border-bottom: 2px solid transparent;
}
.bar nav a:hover { color: var(--text); }
.bar nav a[aria-current="page"] { color: var(--text); border-bottom-color: var(--accent); }
.bar nav a.cta { background: var(--accent); color: var(--on-accent); font-weight: 600; margin-left: 0.5rem; padding: 0 1.25rem; border: 0; }
@media (max-width: 560px) {
  .brand span { display: none; }
  .bar nav a { padding: 0 0.55rem; font-size: 0.875rem; }
  .bar nav a.cta { margin-left: 0.25rem; padding: 0 0.8rem; }
}

footer.site { border-top: 1px solid var(--border); margin-top: 5rem; font-size: 0.875rem; color: var(--text-dim); }
footer.site .edge { padding: 1.25rem 24px; display: flex; flex-wrap: wrap; gap: 0.5rem 2rem; justify-content: space-between; }
@media (max-width: 560px) { footer.site .edge { padding-left: 16px; padding-right: 16px; } }

/* --- Buttons ------------------------------------------------------------ */

.button {
  display: inline-flex; align-items: center; height: 44px; padding: 0 1.25rem;
  border: 1px solid var(--border); text-decoration: none; font-weight: 600;
  background: var(--bg-raised);
}
.button:hover { border-color: var(--text-dim); }
.button.primary { background: var(--accent); color: var(--on-accent); border-color: var(--accent); }

/* --- Permachrome home --------------------------------------------------- */

body.home-page { --bg: #0f0f11; --bg-raised: #1c1c20; }
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) body.home-page { --bg: #f6f6f4; --bg-raised: #ffffff; }
}
.home { min-height: 100vh; display: flex; flex-direction: column; padding: 0 16px; }
.home-inner { flex: 1; width: 100%; max-width: 36rem; margin: 0 auto; padding: 4rem 0 2rem;
  display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; }
.wordmark { margin: 0 0 4rem; line-height: 0; width: 100%; }
.wordmark .logo { display: block; width: 100%; height: auto; margin: 0 auto; }
.home .product { width: 100%; max-width: 26rem; text-align: left; }
.home-foot { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.25rem 1.5rem;
  padding: 1.5rem 0; font-size: 0.8rem; color: var(--text-dim); }
.home-foot a { text-decoration: none; }
.home-foot a:hover { color: var(--text); }
.product {
  display: flex; align-items: center; gap: 1.25rem; padding: 1.25rem 1.25rem;
  border: 1px solid var(--border); background: var(--bg-raised); text-decoration: none;
}
.product:hover { border-color: var(--text-dim); }
.product strong { display: block; font: 700 1.25rem var(--heading); }
.product small { display: block; color: var(--text-dim); font-size: 0.875rem; }
.product .arrow { margin-left: auto; color: var(--text-dim); font-size: 1.25rem; }
.product:hover .arrow { color: var(--text); }

/* --- Deltachrome overview ----------------------------------------------- */

.hero { padding: 5rem 0 3.5rem; }
.hero h1 { font-size: clamp(2.5rem, 8vw, 4rem); margin: 1.25rem 0 0.75rem; letter-spacing: -0.03em; }
.hero .lede { font-size: 1.25rem; margin: 0 0 2rem; }
.hero-links { display: flex; flex-wrap: wrap; gap: 0.75rem; }

.facts-band { background: var(--bg-sunk); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.facts { display: grid; grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr)); gap: 0 2rem; }
.facts div { padding: 2.25rem 0.5rem; text-align: center; }
.facts .icon { display: block; margin: 0 auto 0.75rem; width: 28px; height: 28px; color: var(--accent); }
.facts strong { display: block; font: 700 2rem/1.1 var(--heading); margin-bottom: 0.35rem; }
.facts span { color: var(--text-dim); font-size: 0.925rem; display: block; max-width: 16rem; margin: 0 auto; }

.features { list-style: none; padding: 0; margin: 4rem 0 0; display: grid; gap: 1rem;
  grid-template-columns: repeat(3, minmax(0, 1fr)); }
@media (max-width: 900px) { .features { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 560px) { .features { grid-template-columns: minmax(0, 1fr); } }
.features li { padding: 1.5rem; background: var(--bg-raised); border: 1px solid var(--border); }
.features .icon { color: var(--accent); }
.features h3 { font-size: 1.05rem; margin: 0.85rem 0 0.4rem; }
.features p { margin: 0; color: var(--text-dim); font-size: 0.925rem; }

.download-block { margin-top: 5rem; text-align: center; }
.download-block h2 { font-size: 1.75rem; margin: 0 0 1.5rem; }

.download-block .note { color: var(--text-dim); margin: 0 auto; max-width: 32rem; font-size: 0.925rem; }
.downloads { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.75rem; margin-bottom: 1.5rem; }
.download {
  font: inherit; color: var(--text); text-align: left; text-decoration: none;
  min-width: 11rem; padding: 0.85rem 1.25rem;
  background: var(--bg-raised); border: 1px solid var(--border);
}
.download:hover { border-color: var(--accent); }
.download strong { display: block; }
.download small { color: var(--text-dim); }
.download-block .release { color: var(--text-dim); margin: 0 auto 1.25rem; font-size: 0.85rem; }

/* --- Guide -------------------------------------------------------------- */

.docs { display: grid; gap: 2rem; padding-top: 2rem; }
@media (min-width: 900px) { .docs { grid-template-columns: 14rem minmax(0, 1fr); gap: 4rem; padding-top: 3rem; } }

.docs-nav { font-size: 0.925rem; align-self: start; }
.docs-nav summary {
  cursor: pointer; padding: 0.75rem 1rem; background: var(--bg-raised);
  border: 1px solid var(--border); font-weight: 600;
}
.docs-nav ol { list-style: none; margin: 0; padding: 0; }
.docs-nav > ol { padding: 0.5rem 0; }
.docs-nav li a { display: block; padding: 0.35rem 0 0.35rem 1rem; text-decoration: none; color: var(--text-dim); border-left: 2px solid var(--border); }
.docs-nav li a:hover { color: var(--text); }
.docs-nav li.current > a { color: var(--text); border-left-color: var(--accent); font-weight: 600; }
.docs-nav li ol a { padding-left: 1.75rem; font-size: 0.875rem; }
.docs-nav li ol a.here { color: var(--text); }
@media (min-width: 900px) {
  .docs-nav { position: sticky; top: 76px; }
  .docs-nav summary { display: none; }
}

.prose { max-width: var(--measure); min-width: 0; }
.prose h1 { font-size: clamp(2rem, 6vw, 2.5rem); margin: 0 0 1.5rem; }
.prose h2 { font-size: 1.375rem; margin: 2.75rem 0 0.75rem; padding-top: 1.5rem; border-top: 1px solid var(--border); }
.prose h1 + p, .prose h1 + h2 { margin-top: 0; }
.prose h1 + h2 { border-top: 0; padding-top: 0; }
.prose p, .prose li, .prose dd { color: color-mix(in srgb, var(--text) 88%, var(--bg)); }
.prose ul { padding-left: 1.25rem; }
.prose li { margin: 0.25rem 0; }
.prose li > ul { margin: 0.25rem 0; }
.prose dl { margin: 1.25rem 0; border-top: 1px solid var(--border); }
.prose dt { font-weight: 600; padding-top: 0.75rem; }
.prose dd { margin: 0.15rem 0 0; padding-bottom: 0.75rem; border-bottom: 1px solid var(--border); }

.v {
  display: inline-block; padding: 0 0 0 0.45em; font: 600 0.8em/1.5 var(--body);
  letter-spacing: 0.03em; border-left: 3px solid currentColor; border-radius: 1px;
}
.v.pass { color: var(--pass); }
.v.fail { color: var(--fail); }
.v.qualified { color: var(--qualified); }
.v.absent { color: var(--absent); }
.v.unknown { color: var(--unknown); }

.shot { margin: 1.75rem 0; }
.shot .frame {
  aspect-ratio: 16 / 10; display: grid; place-items: center;
  background: var(--bg-sunk); border: 1px dashed var(--border);
  color: var(--text-spent); font-size: 0.875rem;
}
.shot img { display: block; width: 100%; height: auto; border: 1px solid var(--border); }
.shot figcaption { margin-top: 0.5rem; font-size: 0.875rem; color: var(--text-dim); }

.pager { display: flex; justify-content: space-between; gap: 1rem; margin-top: 4rem; padding-top: 1.5rem; border-top: 1px solid var(--border); }
.pager a { text-decoration: none; font-weight: 600; display: flex; flex-direction: column; }
.pager a small { font-weight: 400; color: var(--text-dim); font-size: 0.8rem; }
.pager .next { text-align: right; margin-left: auto; }

/* --- Targets & guidelines grid ------------------------------------------ */

.wide { max-width: 90rem; }
.page-head { padding: 3rem 0 1.5rem; }
.page-head h1 { font-size: clamp(2rem, 6vw, 2.5rem); margin: 0 0 0.75rem; }

.grid-controls { display: flex; flex-wrap: wrap; gap: 0.75rem 1.25rem; align-items: end; padding: 1rem 0; border-top: 1px solid var(--border); }
.grid-controls label { display: flex; flex-direction: column; gap: 0.3rem; font-size: 0.8rem; color: var(--text-dim); max-width: 100%; }
.grid-controls select {
  font: inherit; font-size: 0.925rem; color: var(--text); background: var(--bg-raised);
  border: 1px solid var(--border); height: 38px; padding: 0 0.5rem; max-width: 100%;
}
#material { max-width: min(28rem, 100%); }
.segmented { display: flex; margin-left: auto; }
.segmented button {
  font: inherit; font-size: 0.875rem; height: 38px; padding: 0 0.9rem; cursor: pointer;
  color: var(--text-dim); background: var(--bg-raised); border: 1px solid var(--border);
}
.segmented button + button { border-left: 0; }
.segmented button[aria-pressed="true"] { color: var(--text); background: var(--border); }
@media (max-width: 640px) { .segmented { margin-left: 0; } }


.grid-scroll { margin-top: 0.5rem; overflow-x: auto; border: 1px solid var(--border); max-height: 80vh; }
table.support { border-collapse: separate; border-spacing: 0; font-size: 0.85rem; width: 100%; }
.support th, .support td { border-bottom: 1px solid var(--border); background: var(--bg); }
.support thead th { position: sticky; z-index: 2; background: var(--bg-raised); }
/* A group's name may wrap: a one-metric group named "White Balance" would
   otherwise set its column's width by its heading rather than its label. */
.support thead tr.families th { top: 0; height: 2.75rem; font: 600 0.66rem/1.25 var(--body); letter-spacing: 0.05em; text-transform: uppercase; color: var(--text-dim); text-align: left; vertical-align: bottom; padding: 0.4rem 0.5rem; border-left: 1px solid var(--border); }
.support thead tr.metrics th { top: 2.75rem; padding: 0.55rem 0.2rem; font-weight: 500; font-size: 0.75rem; color: var(--text-dim); white-space: nowrap; text-align: center; }
.support thead tr.metrics th:hover { color: var(--text); }
.support thead tr.families th.single { padding: 0.55rem 0.2rem; font: 500 0.75rem/1.6 var(--body); letter-spacing: 0;
  text-transform: none; text-align: center; white-space: nowrap; }
.support thead tr.families th.single:hover { color: var(--text); }
.support th.first, .support td.first { border-left: 1px solid var(--border); }
.support td { min-width: 2.35rem; height: 3.25rem; }

.support .name {
  position: sticky; left: 0; z-index: 1; text-align: left; padding: 0.55rem 1rem 0.55rem 0.75rem;
  width: 14rem; min-width: 14rem; border-right: 1px solid var(--border); font-weight: 400;
}
.support thead .name { z-index: 3; vertical-align: bottom; padding-bottom: 0.65rem;
  font: 600 0.7rem/1 var(--body); letter-spacing: 0.06em; text-transform: uppercase; color: var(--text-dim); }
.support .name strong { display: block; font-weight: 600; }
.support .name small { color: var(--text-dim); }
.support .name .cover { display: block; margin-top: 0.15rem; font-size: 0.75rem; font-variant-numeric: tabular-nums; }
.support .name .cover.full { color: var(--pass); }
.support .name .cover.part { color: var(--qualified); }
.support .name .cover.zero { color: var(--text-spent); }
.support tbody tr.kind th { text-align: left; padding: 1rem 0 0.4rem; font: 600 0.7rem/1 var(--body); letter-spacing: 0.06em; text-transform: uppercase; color: var(--text-dim); background: var(--bg); }
.support tbody tr.kind th span { position: sticky; left: 0.75rem; display: inline-block; }
.support tbody tr:hover td, .support tbody tr:hover .name { background: var(--bg-raised); }
.support td { text-align: center; padding: 0; }

.dot { display: inline-block; width: 10px; height: 10px; border-radius: 50%; vertical-align: middle; }
.dot.on { background: var(--text); }
.dot.off { border: 1.5px solid var(--text-dim); }
.dot.none { background: transparent; border: 1px solid var(--text-spent); width: 4px; height: 4px; }

.legend { list-style: none; padding: 0; margin: 1rem 0 0; display: flex; flex-wrap: wrap; gap: 0.5rem 1.5rem; font-size: 0.85rem; color: var(--text-dim); }
.legend li { display: flex; align-items: center; gap: 0.5rem; }

.metric-key { columns: 4 15rem; column-gap: 2rem;
  margin: 1.5rem 0 0; padding-top: 1.25rem; border-top: 1px solid var(--border); font-size: 0.85rem; color: var(--text-dim); }
.metric-key div { display: flex; gap: 0.75rem; break-inside: avoid; padding: 0.3rem 0; border-bottom: 1px solid var(--border); }
.metric-key dt { flex: none; width: 4.25rem; color: var(--text); font-weight: 600; }
.metric-key dd { margin: 0; }

.tip { position: fixed; z-index: 20; pointer-events: none; max-width: 18rem; padding: 0.35rem 0.6rem;
  background: var(--text); color: var(--bg); font-size: 0.8rem; line-height: 1.35; }
@media (max-width: 640px) {
  .support .name { width: 10rem; min-width: 9.5rem; max-width: 11rem; padding-right: 0.5rem; font-size: 0.8rem; }
}