/* PeptiDeal — catalogue release (ui-design §16). Tokens are the §2 names, unchanged, so the full
   shop extends this file instead of replacing it. No script, no third-party resource. */

@font-face {
  font-family: "Inter"; font-style: normal; font-weight: 100 900; font-display: swap;
  src: url("../fonts/inter-latin-wght-normal.woff2") format("woff2");
  unicode-range: U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;
}
@font-face {
  font-family: "Inter"; font-style: normal; font-weight: 100 900; font-display: swap;
  src: url("../fonts/inter-latin-ext-wght-normal.woff2") format("woff2");
  unicode-range: U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF;
}
@font-face {
  font-family: "IBM Plex Mono"; font-style: normal; font-weight: 400; font-display: swap;
  src: url("../fonts/ibm-plex-mono-latin-400-normal.woff2") format("woff2");
  unicode-range: U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;
}
@font-face {
  font-family: "IBM Plex Mono"; font-style: normal; font-weight: 400; font-display: swap;
  src: url("../fonts/ibm-plex-mono-latin-ext-400-normal.woff2") format("woff2");
  unicode-range: U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF;
}

/* Light (default) — §2.1 */
:root {
  color-scheme: light dark;
  --bg:#FFFFFF; --surface:#F4F6F8; --sunk:#E9EDF1;
  --ink-1:#0F1419; --ink-2:#39434D; --ink-3:#566370;
  --accent:#0B4A7F; --accent-hover:#083A65; --focus-ring:#0B4A7F;
  --border:#C3CBD3; --border-strong:#767F88;
  --compliance-fg:#0F1419; --compliance-bg:#FDF3DC; --compliance-rule:#6B4A05;
  --logo-plate:transparent;
  --on-accent:#FFFFFF;

  --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, "Liberation Mono", monospace;
  --t-display: 650 1.75rem/2.25rem var(--font-sans);   /* 28/36 at xs; 33/40 from md */
  --t-h2: 600 1.4375rem/2rem var(--font-sans);         /* 23/32 */
  --t-h3: 600 1.125rem/1.75rem var(--font-sans);
  --t-body: 400 1rem/1.625rem var(--font-sans);        /* 16/26 */
  --t-body-s: 400 0.875rem/1.375rem var(--font-sans);  /* 14/22 */
  --t-caption: 400 0.8125rem/1.25rem var(--font-sans); /* 13 */
  --t-mono: 400 0.9375rem/1.5rem var(--font-mono);     /* 15/24 */
  --t-mono-s: 400 0.84375rem/1.375rem var(--font-mono);/* 13.5/22 */
  --r-0: 0; --r-1: 4px; --r-2: 8px;
  --pad: 16px;
}
/* Dark — §2.2; follows the OS setting only (a toggle would need a cookie) */
@media (prefers-color-scheme: dark) {
  :root {
    --bg:#0E1317; --surface:#161D24; --sunk:#0A0E12;
    --ink-1:#E9EEF2; --ink-2:#B6C2CC; --ink-3:#8B99A5;
    --accent:#78B4EC; --accent-hover:#9CCBF5; --focus-ring:#9CCBF5;
    --border:#2C3841; --border-strong:#5E6D79;
    --compliance-fg:#E9EEF2; --compliance-bg:#261D08; --compliance-rule:#E3C069;
    --logo-plate:#FFFFFF;
    --on-accent:#0E1317;
  }
}
@media (min-width: 480px) { :root { --pad: 20px; } }

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink-1);
  font: var(--t-body);
}
img { max-width: 100%; height: auto; }
a { color: var(--accent); text-underline-offset: 0.15em; }
a:hover { color: var(--accent-hover); }
a:focus-visible { outline: 2px solid var(--focus-ring); outline-offset: 2px; border-radius: 2px; }
h1, h2, h3 { margin: 0; font-weight: 600; }
h1 { font: var(--t-display); font-weight: 650; overflow-wrap: anywhere; }
@media (min-width: 768px) { h1 { font-size: 2.0625rem; line-height: 2.5rem; } }
h2 { font: var(--t-h2); font-weight: 600; margin: 2.5rem 0 0.75rem; }
h3 { font: var(--t-h3); font-weight: 600; }
p { margin: 0 0 1rem; }

.visually-hidden {
  position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.skip-link {
  position: absolute; left: var(--pad); top: -100px; z-index: 10;
  background: var(--bg); color: var(--accent); padding: 12px 16px; border: 2px solid var(--focus-ring);
}
.skip-link:focus { top: 8px; }

/* Header (§16.5) */
.site-header { border-bottom: 1px solid var(--border); }
.site-header__inner {
  max-width: 1200px; margin: 0 auto; padding: 8px var(--pad) 12px;
  display: grid; grid-template-columns: auto 1fr auto;
  grid-template-areas: "logo . lang" "open open open" "search search search";
  align-items: center; column-gap: 16px;
}
.site-header__logo { grid-area: logo; display: inline-flex; min-height: 44px; align-items: center; }
.site-header__logo img { height: 40px; width: auto; display: block; background: var(--logo-plate); border-radius: var(--r-1); }
.site-header__opening { grid-area: open; font: var(--t-body-s); color: var(--ink-2); font-weight: 500; margin: 0 0 4px; }
.site-header__lang { grid-area: lang; }
.lang-link { display: inline-flex; align-items: center; min-height: 44px; min-width: 44px; padding: 0 4px; font: var(--t-body-s); text-decoration: none; }
.lang-link:hover, .lang-link:focus-visible { text-decoration: underline; }
@media (min-width: 768px) {
  .site-header__inner { grid-template-columns: auto 1fr auto auto; grid-template-areas: "logo . open lang" "search search search search"; }
  .site-header__logo img { height: 56px; }
  .site-header__opening { margin: 0; }
}
@media (min-width: 1024px) {
  .site-header__inner { min-height: 96px; grid-template-columns: auto 1fr auto auto; grid-template-areas: "logo open lang search"; padding-bottom: 8px; }
  .search { width: 400px; }
}

/* Search (ui §16.5, §16.5a): label above, input + button; suggestions under the form */
.search { grid-area: search; position: relative; margin-top: 4px; }
.search__label { display: block; font: var(--t-body-s); font-weight: 600; color: var(--ink-2); margin-bottom: 6px; }
.search__row { display: flex; gap: 8px; }
.search input {
  flex: 1 1 auto; min-width: 0; height: 48px; padding: 0 12px;
  font: var(--t-body); color: var(--ink-1); background: var(--bg);
  border: 1px solid var(--border-strong); border-radius: var(--r-1);
}
.search input:focus-visible { outline: 2px solid var(--focus-ring); outline-offset: 2px; }
.search button {
  flex: 0 0 auto; height: 48px; min-width: 44px; padding: 0 16px; cursor: pointer;
  font: var(--t-body); font-weight: 600; color: var(--bg); background: var(--accent);
  border: 0; border-radius: var(--r-1);
}
.search button:hover { background: var(--accent-hover); }
.search button:focus-visible { outline: 2px solid var(--focus-ring); outline-offset: 2px; }
.suggest {
  position: absolute; left: 0; right: 0; top: 100%; z-index: 20; margin: 4px 0 0; padding: 0; list-style: none;
  background: var(--bg); border: 1px solid var(--border-strong); border-radius: var(--r-1);
  box-shadow: 0 4px 16px rgba(15, 20, 25, 0.16);
}
.suggest[hidden] { display: none; }
.suggest li + li { border-top: 1px solid var(--border); }
.suggest a {
  display: block; min-height: 48px; padding: 8px 12px; text-decoration: none; color: var(--ink-1);
  border-left: 4px solid transparent; overflow-wrap: anywhere;
}
.suggest a:hover, .suggest a.is-active { background: var(--surface); border-left-color: var(--accent); }
.sg-name { display: block; font: var(--t-body); font-weight: 500; }
.sg-aliases { display: block; font: var(--t-body-s); color: var(--ink-2); }
.results { list-style: none; margin: 0; padding: 0; }
@media (prefers-color-scheme: dark) { .site-header__logo img, .home-logo img { padding: 4px; } }

/* Main column (§16.4) */
main { display: block; max-width: 760px; margin: 0 auto; padding: 24px var(--pad) 48px; }
main.main--wide { max-width: 1200px; }
.prose { max-width: 72ch; }

/* Breadcrumb */
.breadcrumb ol { list-style: none; margin: 0 0 16px; padding: 0; display: flex; flex-wrap: wrap; gap: 4px; font: var(--t-body-s); color: var(--ink-2); }
.breadcrumb li + li::before { content: "›"; margin-right: 4px; color: var(--ink-3); }
.breadcrumb a { display: inline-block; padding: 2px 0; }

/* Identity */
.aliases { color: var(--ink-2); margin: 8px 0 0; overflow-wrap: anywhere; }

/* RUO notice (§16.6) */
.ruo {
  margin: 24px 0 0; padding: 16px; border-radius: var(--r-1);
  background: var(--compliance-bg); color: var(--compliance-fg);
  border-left: 4px solid var(--compliance-rule);
}
.ruo h2 { margin: 0 0 4px; font: var(--t-body); font-weight: 650; }
.ruo p { margin: 0; font: var(--t-body); }

/* Formats (§16.7): static bordered items, not chips */
.formats__caption { font: var(--t-body-s); color: var(--ink-2); margin: 0 0 8px; }
.format-list { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.format-list li {
  font: var(--t-mono); padding: 8px 14px;
  border: 1px solid var(--border-strong); border-radius: var(--r-0); white-space: nowrap; cursor: default;
}

/* Data grid */
.data { margin: 0; display: grid; grid-template-columns: 1fr; border-top: 1px solid var(--border); }
.data > div { display: grid; grid-template-columns: 1fr; padding: 10px 0; border-bottom: 1px solid var(--border); }
.data dt { font: var(--t-body-s); color: var(--ink-2); font-weight: 500; }
.data dd { margin: 0; overflow-wrap: anywhere; }
@media (min-width: 480px) { .data > div { grid-template-columns: 9rem 1fr; column-gap: 16px; } }
.mono { font: var(--t-mono); }
.nowrap { white-space: nowrap; }
.formula span { white-space: nowrap; }
.sequence {
  margin: 4px 0 0; padding: 8px 12px; background: var(--sunk); border-radius: var(--r-1);
  font: var(--t-mono-s); color: var(--ink-1);
  display: flex; flex-wrap: wrap; column-gap: 1ch; row-gap: 2px; align-items: baseline;
}
.sequence__index { color: var(--ink-3); }
.sequence__group { white-space: nowrap; }
.sequence__caption { display: block; font: var(--t-caption); color: var(--ink-2); }
.purity { margin: 16px 0 0; font-weight: 500; }

/* Questions / ask us */
.askus__note { font: var(--t-body-s); color: var(--ink-2); }
.back-link { display: inline-block; margin-top: 32px; padding: 10px 0; }

/* Home (§16.8) */
.home-logo { margin: 8px auto 24px; max-width: 360px; }
.home-logo img { display: block; width: 100%; height: auto; background: var(--logo-plate); border-radius: var(--r-2); }
.letters ul { list-style: none; margin: 0 0 16px; padding: 0; display: flex; flex-wrap: wrap; gap: 4px; }
.letters a { display: inline-flex; align-items: center; justify-content: center; min-width: 44px; min-height: 44px; font-weight: 500; }
.index { columns: 1; column-gap: 32px; }
@media (min-width: 768px) { .index { columns: 2; } }
@media (min-width: 1024px) { .index { columns: 3; } }
.index__group { break-inside: avoid; margin: 0 0 16px; }
.index__group h3 { border-bottom: 1px solid var(--border); padding-bottom: 2px; margin-bottom: 4px; }
.index__group ul { list-style: none; margin: 0; padding: 0; }
.index__entry { padding: 6px 0; min-height: 44px; }
.index__entry a { font-weight: 500; overflow-wrap: anywhere; display: inline-block; padding: 2px 0; }
.index__aliases { display: block; font: var(--t-body-s); color: var(--ink-2); overflow-wrap: anywhere; }

/* Not found */
.button-link {
  display: inline-flex; align-items: center; min-height: 44px; padding: 0 20px; margin: 8px 0 16px;
  background: var(--accent); color: var(--on-accent); border-radius: var(--r-1); text-decoration: none; font-weight: 600;
}
.button-link:hover { background: var(--accent-hover); color: var(--on-accent); }

/* Footer (§16.10) */
.site-footer { background: var(--surface); border-top: 1px solid var(--border); }
.site-footer__inner { max-width: 1200px; margin: 0 auto; padding: 24px var(--pad) 32px; }
.company { margin: 0; display: grid; grid-template-columns: 1fr; gap: 16px 32px; }
@media (min-width: 480px) { .company { grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); } }
.company dt { font: var(--t-caption); color: var(--ink-3); text-transform: uppercase; letter-spacing: 0.06em; font-weight: 600; }
.company dd { margin: 2px 0 0; font: var(--t-body-s); color: var(--ink-1); }

/* Typo matches set apart (decisions §5 D160): a quiet, non-interactive separator */
.typo-sep { margin: 16px 0 4px; font: var(--t-body-s); color: var(--ink-3); }
.suggest li.sg-sep {
  padding: 6px 12px 4px; font: var(--t-caption); color: var(--ink-3); background: var(--bg);
  cursor: default; user-select: none;
}

/* IUPAC name: long systematic names wrap anywhere, never widen the page */
.iupac { font: var(--t-mono-s); overflow-wrap: anywhere; word-break: break-word; }