/* DirectoryCodes · classic pages (/ask/, /data/) · HORIZON (DESIGN.md Register 8) — 2026-09-27.
   Light by default; dark via the page's own switch (data-theme, localStorage "dc-theme") or the OS setting, as before.
   Class names used by /assets/site.js and /assets/ask.js are kept: search-box, search-results(.open), search-empty,
   r-code/r-name/r-coll, .active, copy-note, ask-answer(.show/.ask-error). */
@font-face { font-family: "Archivo"; src: url("fonts/dc-archivo-700.woff2") format("woff2"); font-weight: 700; font-display: swap; }
@font-face { font-family: "Instrument Sans"; src: url("fonts/dc-instrument-sans-var.woff2") format("woff2"); font-weight: 400 700; font-display: swap; }
@font-face { font-family: "IBM Plex Mono"; src: url("fonts/dc-plex-mono-400.woff2") format("woff2"); font-weight: 400; font-display: swap; }
@font-face { font-family: "IBM Plex Mono"; src: url("fonts/dc-plex-mono-500.woff2") format("woff2"); font-weight: 500 600; font-display: swap; }

:root {
  --navy: #0F2552; --ink: #33466B; --muted: #66779A; --agate: #8A98B5; --line: #DCE7F4; --line-mid: #D2DEEE;
  --paper: #FFFFFF; --sky: #F5F9FE; --tint: #EAF3FC; --panel: #F3F8FE;
  --accent: #1F6FEB; --accent-deep: #1E4FC4; --accent-2: #2EE6D0; --accent-mid: #22C3E8;
  --grad: linear-gradient(90deg, #2EE6D0 0%, #22C3E8 45%, #1F6FEB 100%); --grad-button: linear-gradient(90deg, #1FB5E3, #1F6FEB);
  --urgent: #D9304F; --urgent-bg: #FDE8EC;
  --shadow: 0 1px 2px rgba(15, 37, 82, .06), 0 10px 30px rgba(31, 79, 196, .10);
  --shadow-lift: 0 2px 4px rgba(15, 37, 82, .06), 0 18px 40px rgba(31, 79, 196, .16);
  --page: linear-gradient(180deg, #F3F8FE 0%, #FFFFFF 38%, #F4F9FE 100%);
  --f-display: "Archivo", "Helvetica Neue", Arial, sans-serif; --f-ui: "Instrument Sans", "Helvetica Neue", Arial, sans-serif;
  --f-data: "IBM Plex Mono", ui-monospace, Menlo, monospace; --ease: cubic-bezier(.2, .7, .2, 1); --gutter: clamp(16px, 4.5vw, 48px);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --navy: #EAF2FF; --ink: #C9D6EE; --muted: #93A3C4; --agate: #7384A6; --line: #1F3158; --line-mid: #2A3E69;
    --paper: #12213F; --sky: #0B1630; --panel: #152748; --tint: #172C52; --accent: #5B9BFF; --accent-deep: #8AB6FF; --accent-mid: #4FD6F2;
    --urgent: #FF6B86; --urgent-bg: #45172A; --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 8px 24px rgba(0, 0, 0, .35); --shadow-lift: var(--shadow);
    --page: linear-gradient(180deg, #172C52 0, #0B1630 320px); color-scheme: dark;
  }
}
[data-theme="dark"] {
  --navy: #EAF2FF; --ink: #C9D6EE; --muted: #93A3C4; --agate: #7384A6; --line: #1F3158; --line-mid: #2A3E69;
  --paper: #12213F; --sky: #0B1630; --panel: #152748; --tint: #172C52; --accent: #5B9BFF; --accent-deep: #8AB6FF; --accent-mid: #4FD6F2;
  --urgent: #FF6B86; --urgent-bg: #45172A; --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 8px 24px rgba(0, 0, 0, .35); --shadow-lift: var(--shadow);
  --page: linear-gradient(180deg, #172C52 0, #0B1630 320px); color-scheme: dark;
}
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) svg .dot { fill: #8AB6FF; } }
[data-theme="dark"] svg .dot { fill: #8AB6FF; }

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--sky); background-image: var(--page); color: var(--ink); font: 400 16px/1.6 var(--f-ui); -webkit-font-smoothing: antialiased; }
a { color: var(--accent); text-underline-offset: 3px; }
a:hover { color: var(--accent-deep); }
:focus-visible { outline: 3px solid rgba(31, 111, 235, .45); outline-offset: 3px; border-radius: 8px; }
h1, h2, h3, h4 { font-family: var(--f-display); font-weight: 700; color: var(--navy); letter-spacing: -.015em; line-height: 1.08; }
.shell { max-width: 1200px; margin: 0 auto; padding: 0 var(--gutter); }

/* header */
.hz-head { border-bottom: 1px solid var(--line); background: color-mix(in srgb, var(--paper) 72%, transparent); backdrop-filter: saturate(1.4) blur(8px); position: relative; z-index: 20; }
.topline { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding-top: 8px; font: 500 .72rem/1.4 var(--f-ui); letter-spacing: .14em; text-transform: uppercase; color: var(--muted); }
.topline .right { margin-left: auto; white-space: nowrap; }
.theme-toggle { min-height: 32px; margin-left: 4px; padding: 0 12px; border-radius: 999px; border: 1px solid var(--line-mid); background: var(--paper); color: var(--navy);
  font: 600 .72rem/1 var(--f-ui); letter-spacing: .1em; text-transform: uppercase; cursor: pointer; }
.masthead { display: flex; align-items: center; justify-content: space-between; gap: 8px 20px; flex-wrap: wrap; padding: 8px 0 6px; }
.wordmark, .fm { display: inline-flex; align-items: center; gap: 10px; min-height: 44px; text-decoration: none; }
.wordmark svg, .fm svg { width: 36px; height: 36px; flex: none; }
.wm { font: 700 1.08rem/1 var(--f-display); letter-spacing: .08em; text-transform: uppercase; color: var(--navy); white-space: nowrap; }
.wm em { font-style: normal; color: var(--accent); }
.masthead .sub { font-size: .92rem; color: var(--muted); }
.site-nav { display: flex; gap: 6px; overflow-x: auto; padding: 4px 0 10px; scrollbar-width: none; -webkit-mask-image: linear-gradient(90deg, #000 92%, transparent); mask-image: linear-gradient(90deg, #000 92%, transparent); }
.site-nav::-webkit-scrollbar { display: none; }
.site-nav a { flex: none; display: inline-flex; align-items: center; min-height: 36px; padding: 0 14px; border-radius: 999px; background: var(--paper); box-shadow: var(--shadow);
  color: var(--ink); text-decoration: none; font: 500 .9rem/1 var(--f-ui); }
.site-nav a:hover { color: var(--navy); }
.site-nav a[aria-current="page"] { color: #fff; background: var(--grad-button); }
.search-box { position: relative; padding-bottom: 14px; max-width: 640px; }
.search-field { display: flex; align-items: center; gap: 10px; min-height: 48px; padding: 0 14px; border-radius: 14px; border: 1.5px solid var(--line-mid); background: var(--paper); color: var(--muted);
  transition: border-color .2s var(--ease), box-shadow .2s var(--ease); }
.search-field:focus-within { border-color: var(--accent); box-shadow: 0 0 0 4px rgba(31, 111, 235, .14); }
.search-field input { flex: 1; min-width: 0; min-height: 40px; border: 0; outline: 0; background: transparent; font: 500 1rem/1 var(--f-data); color: var(--navy); }
.search-field input::placeholder { color: var(--agate); }
.search-results { display: none; position: absolute; left: 0; right: 0; top: calc(100% - 8px); z-index: 40; max-height: min(60vh, 460px); overflow-y: auto; padding: 6px;
  background: var(--paper); border: 1px solid var(--line); border-radius: 16px; box-shadow: var(--shadow-lift); }
.search-results.open { display: block; }
.search-results a { display: flex; align-items: baseline; gap: 12px; min-height: 44px; padding: 10px 12px; border-radius: 10px; color: var(--navy); text-decoration: none; }
.search-results a:hover, .search-results a.active { background: var(--tint); box-shadow: inset 3px 0 0 var(--accent); }
.search-results .r-code { min-width: 3.6rem; font: 500 .95rem/1.4 var(--f-data); color: var(--accent); }
.search-results .r-name { min-width: 0; flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.search-results .r-coll { flex: none; font: 500 .66rem/1.4 var(--f-ui); letter-spacing: .14em; text-transform: uppercase; color: var(--muted); }
.search-empty { padding: 12px; color: var(--muted); }

/* page */
main { padding: clamp(20px, 4vw, 44px) 0 clamp(48px, 7vw, 88px); }
.kicker { margin: 0; font: 500 .76rem/1.5 var(--f-ui); letter-spacing: .28em; text-transform: uppercase; color: var(--ink); }
.page-head h1 { margin: 10px 0 0; font-size: clamp(2.2rem, 5.4vw, 3.6rem); }
.page-head h1::after { content: ""; display: block; width: 72px; height: 4px; margin-top: 14px; border-radius: 4px; background: var(--grad); }
.dateline { margin: 12px 0 0; font-size: .95rem; color: var(--muted); }
.dateline b { color: var(--navy); }
.ask-grid { margin-top: 22px; display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: clamp(18px, 3vw, 36px); align-items: start; }
.ask-card { background: var(--paper); border-radius: 24px; box-shadow: var(--shadow-lift); padding: clamp(18px, 3vw, 30px); }
.ask-key-row { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr) auto; gap: 10px; }
.filter-field input, .ask-select, .ask-q textarea { width: 100%; min-height: 48px; border-radius: 14px; border: 1.5px solid var(--line-mid); background: var(--paper); color: var(--navy); outline: 0;
  transition: border-color .2s var(--ease), box-shadow .2s var(--ease); }
.filter-field input { padding: 0 14px; font: 500 .95rem/1 var(--f-data); }
.ask-select { padding: 0 12px; font: 500 .92rem/1 var(--f-ui); }
.filter-field input:focus, .ask-select:focus, .ask-q textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 4px rgba(31, 111, 235, .14); }
.filter-field input::placeholder, .ask-q textarea::placeholder { color: var(--agate); }
.ask-q { margin-top: 12px; }
.ask-q textarea { display: block; min-height: 132px; padding: 12px 14px; resize: vertical; font: 400 1rem/1.55 var(--f-ui); }
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: 0 22px; border-radius: 999px; border: 0; cursor: pointer;
  font: 600 .95rem/1 var(--f-ui); color: #fff; background: var(--grad-button); box-shadow: var(--shadow); transition: box-shadow .2s var(--ease), transform .2s var(--ease); white-space: nowrap; }
.btn:hover { box-shadow: var(--shadow-lift); transform: translateY(-1px); }
.btn:disabled { opacity: .6; cursor: progress; transform: none; }
.btn.ghost { color: var(--navy); background: var(--paper); border: 1px solid var(--line-mid); box-shadow: none; }
.ask-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; margin-top: 14px; }
.ask-status { font-size: .92rem; color: var(--muted); }
.ask-answer { display: none; margin-top: 18px; border-radius: 16px; border: 1px solid var(--line); background: var(--panel); overflow: hidden; }
.ask-answer.show { display: block; }
.ask-answer .aa-head { padding: 10px 16px; font: 600 .74rem/1.4 var(--f-ui); letter-spacing: .16em; text-transform: uppercase; color: var(--accent); border-bottom: 1px solid var(--line); }
.ask-answer .aa-body { padding: 14px 16px 16px; white-space: pre-wrap; color: var(--navy); overflow-wrap: anywhere; }
.ask-answer.ask-error { border-color: color-mix(in srgb, var(--urgent) 40%, var(--line)); background: var(--urgent-bg); }
.ask-answer.ask-error .aa-head { color: var(--urgent); }
.ask-aside .intro { margin: 0; font-size: 1.02rem; color: var(--ink); }
.ask-note { margin-top: 16px; padding: 16px 18px; border-radius: 18px; background: var(--paper); box-shadow: var(--shadow); font-size: .94rem; color: var(--ink); position: relative; overflow: hidden; }
.ask-note::before { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 5px; background: var(--grad); }
.ask-note b { color: var(--navy); }
.ask-note a { display: inline-block; padding: 6px 0; margin: -6px 0; }
.disclaimer-line { margin-top: 22px; font-size: .9rem; }
.disclaimer-line a { display: inline-block; padding: 8px 0; margin: -8px 0; }
.copy-note { position: fixed; left: 50%; bottom: 24px; transform: translate(-50%, 20px); opacity: 0; padding: 10px 16px; border-radius: 999px; background: var(--navy); color: var(--paper);
  font: 500 .8rem/1 var(--f-data); pointer-events: none; transition: opacity .2s, transform .2s; }
.copy-note.show { opacity: 1; transform: translate(-50%, 0); }

/* footer */
footer { padding: clamp(44px, 6vw, 68px) 0 28px; border-top: 1px solid var(--line); background: color-mix(in srgb, var(--paper) 66%, transparent); }
.foot-grid { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr) minmax(0, 1fr); gap: 28px var(--gutter); }
.foot-about p { margin: 12px 0 0; max-width: 30em; font-size: .94rem; color: var(--muted); }
.foot-about .foot-mail a { display: inline-flex; align-items: center; min-height: 36px; color: var(--navy); }
footer h4 { margin: 0; font: 500 .72rem/1.4 var(--f-ui); letter-spacing: .2em; text-transform: uppercase; color: var(--muted); }
footer ul { list-style: none; margin: 8px 0 0; padding: 0; }
footer ul a { display: inline-flex; align-items: center; min-height: 34px; color: var(--ink); text-decoration: none; font-size: .94rem; }
footer ul a:hover { color: var(--accent); }
.foot-base { margin-top: 28px; padding-top: 20px; border-top: 1px solid var(--line); display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 10px 24px; font-size: .88rem; color: var(--muted); }
.endorsement { font: 500 .72rem/1.4 var(--f-ui); letter-spacing: .2em; text-transform: uppercase; }
.attribution { display: inline-flex; align-items: center; min-height: 36px; color: var(--navy); text-decoration: underline; text-decoration-color: var(--accent-mid); }

@media (max-width: 900px) {
  .ask-grid { grid-template-columns: minmax(0, 1fr); }
  .foot-grid { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .foot-about { grid-column: 1 / -1; }
}
@media (max-width: 640px) {
  .topline .tl-left, .masthead .sub { display: none; }
  .topline { padding-top: 6px; }
  .ask-key-row { grid-template-columns: minmax(0, 1fr) auto; }
  .ask-key-row .filter-field { grid-column: 1 / -1; }
  .ask-select { min-width: 0; }
  .ask-q textarea { min-height: 112px; }
  .search-box { padding-bottom: 12px; }
}
@media (max-width: 420px) { .foot-grid { grid-template-columns: minmax(0, 1fr); } }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { transition: none !important; animation: none !important; } }

/* /data/ — the download ledger */
.data-shell .page-head .intro { margin: 14px 0 0; max-width: 46em; font-size: 1.02rem; }
.table-wrap { margin-top: 22px; background: var(--paper); border-radius: 20px; box-shadow: var(--shadow); overflow-x: auto; }
.ledger { width: 100%; border-collapse: collapse; font-size: .95rem; }
.ledger th { padding: 12px 18px; text-align: left; font: 500 .7rem/1.4 var(--f-ui); letter-spacing: .18em; text-transform: uppercase; color: var(--muted); background: var(--panel); }
.ledger td { padding: 8px 18px; border-top: 1px solid var(--line); vertical-align: middle; }
.ledger .c-name { font-weight: 600; color: var(--navy); }
.ledger .c-mono { font-family: var(--f-data); font-variant-numeric: tabular-nums; color: var(--muted); }
.ledger .c-files { white-space: nowrap; }
.ledger .c-files a { display: inline-flex; align-items: center; min-height: 36px; padding: 0 12px; border-radius: 999px; background: var(--tint); color: var(--accent);
  font: 500 .74rem/1 var(--f-data); letter-spacing: .06em; text-decoration: none; }
.ledger .c-files span { color: var(--agate); margin: 0 2px; }
@media (max-width: 560px) { .ledger th, .ledger td { padding-left: 12px; padding-right: 12px; } .ledger .c-name { font-size: .9rem; } }
.page-head .intro a { display: inline-block; padding: 6px 0; margin: -6px 0; }