/* Lumina website: the Cornell page world, shared with the app. */
@font-face { font-family: "Atkinson"; src: url("fonts/atkinson-hyperlegible-next-latin-wght-normal.woff2") format("woff2-variations"); font-weight: 200 800; font-display: swap; 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: "Atkinson"; src: url("fonts/atkinson-hyperlegible-next-latin-ext-wght-normal.woff2") format("woff2-variations"); font-weight: 200 800; font-display: swap; 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: "Source Serif"; src: url("fonts/source-serif-4-latin-wght-normal.woff2") format("woff2-variations"); font-weight: 200 900; font-style: normal; font-display: swap; 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: "Source Serif"; src: url("fonts/source-serif-4-latin-ext-wght-normal.woff2") format("woff2-variations"); font-weight: 200 900; font-style: normal; font-display: swap; unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+1E00-1E9F, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF; }
@font-face { font-family: "Source Serif"; src: url("fonts/source-serif-4-latin-wght-italic.woff2") format("woff2-variations"); font-weight: 200 900; font-style: italic; font-display: swap; }

/* The same tokens as the app: a near-white desk, white paper, hairlines, charcoal buttons and a soft blue used sparingly. */
:root {
  --desk: #f7f8fa; --paper: #ffffff; --paper-2: #f3f5f8;
  --ink: #1d2129; --ink-2: #4b5563; --ink-3: #6b7280;
  --rule: #7b9be0; --rule-ink: #3f64b4; --rule-soft: #e3e7ee; --rule-hair: #eef1f5; --blue-wash: #f1f5fd;
  --margin: #e0594f; --margin-ink: #b8322a; --margin-soft: #fdeceb;
  --hi: #ffe45c; --hi-wash: #fff8d6; --hi-ink: #5c4a00;
  --ok: #23885b; --ok-wash: #e6f5ed;
  --primary: #20242c; --primary-2: #323843; --primary-ink: #ffffff;
  --cover-ink: var(--ink); --cover-dim: var(--ink-3);
  --shadow: 0 1px 2px rgba(20, 28, 45, .04), 0 8px 24px rgba(20, 28, 45, .05);
  --shadow-pop: 0 1px 2px rgba(20, 28, 45, .05), 0 4px 12px rgba(20, 28, 45, .06), 0 20px 48px rgba(20, 28, 45, .08);
  --sans: "Atkinson", system-ui, -apple-system, "Segoe UI", sans-serif;
  --serif: "Source Serif", Georgia, "Times New Roman", serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Mono", Menlo, Consolas, monospace;
  --cue: 30%;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --desk: #0f1115; --paper: #171a20; --paper-2: #1d2128; --ink: #e8eaee; --ink-2: #b4bac6; --ink-3: #8f97a6;
    --rule: #8ba6e6; --rule-ink: #a3b9ee; --rule-soft: #2a2f3a; --rule-hair: #20242d; --blue-wash: #1c2331;
    --margin: #ff7468; --margin-ink: #ff948a; --margin-soft: #3a1f1f; --hi: #e8c93a; --hi-wash: #322d14; --hi-ink: #f3df8a;
    --ok: #4cc58a; --ok-wash: #15301f; --primary: #e8eaee; --primary-2: #ffffff; --primary-ink: #14171c;
    --shadow: 0 1px 2px rgba(0,0,0,.3); --shadow-pop: 0 4px 12px rgba(0,0,0,.4), 0 16px 40px rgba(0,0,0,.5); color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --desk: #0f1115; --paper: #171a20; --paper-2: #1d2128; --ink: #e8eaee; --ink-2: #b4bac6; --ink-3: #8f97a6;
  --rule: #8ba6e6; --rule-ink: #a3b9ee; --rule-soft: #2a2f3a; --rule-hair: #20242d; --blue-wash: #1c2331;
  --margin: #ff7468; --margin-ink: #ff948a; --margin-soft: #3a1f1f; --hi: #e8c93a; --hi-wash: #322d14; --hi-ink: #f3df8a;
  --ok: #4cc58a; --ok-wash: #15301f; --primary: #e8eaee; --primary-2: #ffffff; --primary-ink: #14171c;
  --shadow: 0 1px 2px rgba(0,0,0,.3); --shadow-pop: 0 4px 12px rgba(0,0,0,.4), 0 16px 40px rgba(0,0,0,.5); color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--desk); color: var(--ink); font: 17px/1.6 var(--sans); -webkit-font-smoothing: antialiased; font-variant-numeric: tabular-nums; overflow-x: hidden; }
::selection { background: color-mix(in srgb, var(--rule) 28%, transparent); }
:focus-visible { outline: 2px solid var(--rule); outline-offset: 3px; border-radius: 4px; }
a { color: var(--rule-ink); text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:hover { color: var(--ink); }
h1, h2, h3 { margin: 0; text-wrap: balance; font-family: var(--serif); font-weight: 600; letter-spacing: -0.015em; }
p { margin: 0; }
code, kbd, pre { font-family: var(--mono); font-size: .88em; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--paper); padding: 8px 12px; border-radius: 6px; z-index: 100; }
.skip:focus { left: 16px; }
.wrap { width: min(1240px, 100% - 32px); margin-inline: auto; }

/* the cover: the hero sits on the plain desk */
.cover { background: var(--desk); padding: 18px 0 72px; position: relative; }
.topbar { display: flex; align-items: center; justify-content: space-between; gap: 16px; color: var(--cover-ink); padding: 4px 0 22px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--cover-ink); text-decoration: none; font: 600 24px/1 var(--serif); }
.topnav { display: flex; gap: 4px; align-items: center; flex-wrap: wrap; }
.topnav a { color: var(--cover-dim); text-decoration: none; font-weight: 600; font-size: 15px; padding: 8px 12px; border-radius: 6px; }
.topnav a:hover { color: var(--cover-ink); background: color-mix(in srgb, var(--cover-ink) 10%, transparent); }
.topnav a.cta { background: var(--primary); color: var(--primary-ink); }
.topnav a.cta:hover { background: var(--primary-2); color: var(--primary-ink); }
.topnav a.gh { color: var(--ink); border: 1px solid var(--rule-soft); }
.topnav a.gh:hover { background: var(--paper); }

/* the sheet */
.sheet { background: var(--paper); border-radius: 12px; box-shadow: 0 0 0 1px var(--rule-hair), var(--shadow-pop); position: relative; overflow: hidden; }
.sheet-head { padding: 28px 44px 24px; border-bottom: 1px solid var(--rule-soft); display: grid; gap: 14px; }
.sheet-head h1 { font-size: clamp(38px, 4.6vw, 64px); line-height: 1.03; max-width: 20ch; }
.sheet-head .lead { font-size: clamp(17px, 1.6vw, 20px); color: var(--ink-2); max-width: 60ch; }
.sheet-meta { display: flex; gap: 14px; flex-wrap: wrap; align-items: center; color: var(--ink-3); font-size: 14px; }
.sheet-meta .sep { width: 4px; height: 4px; border-radius: 50%; background: var(--ink-3); }

.cornell { position: relative; }
.cornell::before { content: ""; position: absolute; top: 0; bottom: 0; left: var(--cue); width: 1px; background: color-mix(in srgb, var(--margin) 45%, transparent); z-index: 1; }
.cornell.live::before { background: linear-gradient(to bottom, var(--margin) 0 40%, color-mix(in srgb, var(--margin) 30%, transparent) 50%, var(--margin) 60% 100%); background-size: 100% 280px; animation: flow 3.2s linear infinite; }
@keyframes flow { to { background-position: 0 280px; } }
.clock { position: absolute; top: -14px; left: var(--cue); transform: translateX(-50%); z-index: 2; background: var(--margin); color: #fff; font: 700 12.5px/1 var(--sans); padding: 6px 11px; border-radius: 14px; display: inline-flex; gap: 7px; align-items: center; letter-spacing: .02em; white-space: nowrap; }
.clock i { width: 7px; height: 7px; border-radius: 50%; background: #fff; animation: breathe 1.6s ease-in-out infinite; }
@keyframes breathe { 50% { opacity: .35; } }
.colheads { display: grid; grid-template-columns: var(--cue) 1fr; font-size: 13px; font-weight: 700; color: var(--ink-3); letter-spacing: .02em; padding: 18px 0 4px; }
.colheads span { padding: 0 28px 0 44px; }
.colheads span + span { padding-left: 34px; }
.crow { display: grid; grid-template-columns: var(--cue) 1fr; border-top: 1px solid var(--rule-hair); min-height: 64px; }
.crow:first-of-type { border-top: 0; }
.crow .c { padding: 16px 28px 16px 44px; font-weight: 700; font-size: 17px; }
.crow .b { padding: 16px 44px 18px 34px; font: 400 clamp(17px, 1.4vw, 19px)/1.55 var(--serif); }
.crow .b.muted { color: var(--ink-3); font-style: italic; }
.crow .b ul { margin: 0; padding-left: 1.1em; }
.crow .b li::marker { color: var(--rule); }
.typing::after { content: ""; display: inline-block; width: 2px; height: 1.05em; background: var(--rule); vertical-align: -2px; margin-left: 2px; animation: caret 1s steps(2) infinite; }
@keyframes caret { 50% { opacity: 0; } }
.fresh { animation: fresh 3.5s ease-out; }
@keyframes fresh { 0%, 35% { background: var(--blue-wash); } 100% { background: transparent; } }
.ticker { display: grid; grid-template-columns: auto 1fr; gap: 14px; align-items: center; padding: 12px 44px; border-top: 1px solid var(--rule-soft); background: var(--paper-2); font-size: 14.5px; min-height: 50px; }
.ticker b { font-size: 12px; color: var(--ink-3); letter-spacing: .02em; }
.ticker .who { font-weight: 700; font-size: 12px; color: var(--rule-ink); margin-right: 8px; }
.ticker .line { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; color: var(--ink-2); }

/* the summary band carries the action */
.foot { border-top: 1px solid var(--rule-soft); display: grid; grid-template-columns: var(--cue) 1fr; }
.foot .c { padding: 22px 28px 26px 44px; }
.foot .c h2 { font-size: 22px; }
.foot .c p { color: var(--ink-2); font-size: 14.5px; margin-top: 6px; }
.foot .b { padding: 20px 44px 26px 34px; display: grid; gap: 12px; }
.tabs { display: inline-flex; gap: 4px; background: var(--paper-2); padding: 4px; border-radius: 8px; width: max-content; max-width: 100%; }
.tabs button { border: 0; background: none; font: 700 14px var(--sans); color: var(--ink-2); padding: 7px 14px; border-radius: 6px; cursor: pointer; }
.tabs button[aria-selected="true"] { background: var(--paper); color: var(--ink); box-shadow: 0 1px 3px rgba(25,38,70,.15); }
.cmd { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 10px; background: #20242c; color: #e8eaee; border-radius: 8px; padding: 6px 6px 6px 18px; min-width: 0; }
.cmd code { font-size: clamp(13px, 1.25vw, 15.5px); white-space: nowrap; overflow-x: auto; padding: 10px 0; scrollbar-width: none; }
.cmd code::-webkit-scrollbar { display: none; }
.cmd code .p { color: #9db6ea; user-select: none; }
.copy { border: 0; cursor: pointer; background: #fff; color: #20242c; font: 700 14px var(--sans); padding: 10px 16px; border-radius: 6px; display: inline-flex; gap: 8px; align-items: center; white-space: nowrap; }
.copy:hover { background: #e8eaee; }
.after { font-size: 14.5px; color: var(--ink-2); }
.after code { background: var(--paper-2); padding: 2px 6px; border-radius: 4px; color: var(--ink); }
.facts { display: flex; flex-wrap: wrap; gap: 8px; }
.chip { display: inline-flex; align-items: center; gap: 6px; height: 28px; padding: 0 11px; border-radius: 14px; font-size: 13.5px; font-weight: 700; background: var(--paper-2); color: var(--ink-2); }
.chip.ok { background: var(--ok-wash); color: var(--ok); }
.chip.blue { background: var(--blue-wash); color: var(--rule-ink); }
.chip.hi { background: var(--hi-wash); color: var(--hi-ink); }

/* sections below the cover: more pages of the same notebook */
main > section { padding: 76px 0 0; }
.page { background: var(--paper); border-radius: 12px; box-shadow: 0 0 0 1px var(--rule-hair), var(--shadow); overflow: hidden; }
.page-head { padding: 30px 44px 22px; border-bottom: 1px solid var(--rule-soft); display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.page-head h2 { font-size: clamp(30px, 3.4vw, 44px); line-height: 1.08; max-width: 22ch; }
.page-head p { color: var(--ink-2); max-width: 52ch; font-size: 16.5px; }
.list .crow .c small { display: block; font-weight: 600; color: var(--ink-3); font-size: 13.5px; margin-top: 2px; }
.list .crow .b p + p { margin-top: 8px; }

.hl { background: linear-gradient(transparent 55%, var(--hi) 55%, var(--hi) 92%, transparent 92%); padding: 0 2px; }
.assist-demo { background: var(--hi-wash); border-radius: 8px; padding: 14px 16px; display: grid; gap: 6px; margin-top: 12px; max-width: 560px; font: 15.5px/1.5 var(--serif); }
.assist-demo q { font: 700 14.5px/1.4 var(--sans); }
.assist-demo span { font: 700 12.5px var(--sans); color: var(--hi-ink); }
.cite { display: inline-flex; align-items: center; justify-content: center; min-width: 19px; height: 19px; padding: 0 5px; border-radius: 10px; background: var(--blue-wash); color: var(--rule-ink); font: 700 11.5px/1 var(--sans); vertical-align: 2px; }

.ledger { width: 100%; border-collapse: collapse; }
.ledger th, .ledger td { text-align: left; padding: 14px 20px; border-top: 1px solid var(--rule-hair); vertical-align: top; }
.ledger thead th { border-top: 0; font: 700 13px var(--sans); color: var(--ink-3); letter-spacing: .02em; border-bottom: 1px solid var(--rule-soft); }
.ledger td:first-child, .ledger th:first-child { padding-left: 44px; }
.ledger td:last-child, .ledger th:last-child { padding-right: 44px; }
.ledger td.n { white-space: nowrap; color: var(--ink-2); }
.ledger b { font-family: var(--serif); font-size: 17.5px; }
.ledger small { color: var(--ink-3); display: block; }
.scroll-x { overflow-x: auto; }

.langs { display: flex; flex-wrap: wrap; gap: 6px; }
.lang { font-size: 13.5px; font-weight: 600; padding: 4px 10px; border-radius: 6px; background: var(--paper-2); color: var(--ink-2); }
.lang.auto { background: var(--primary); color: var(--primary-ink); }
.lang.on { background: var(--blue-wash); color: var(--rule-ink); }
.select-demo { display: grid; gap: 10px; max-width: 520px; }
.select-demo .fake { display: flex; justify-content: space-between; align-items: center; border: 1px solid var(--rule-soft); border-radius: 6px; padding: 10px 14px; font-size: 15px; background: var(--paper); }

.privacy-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.privacy-grid > div { padding: 26px 30px 30px 44px; border-top: 1px solid var(--rule-hair); }
.privacy-grid h3 { font-size: 20px; margin-bottom: 8px; display: flex; gap: 10px; align-items: center; }
.privacy-grid p { color: var(--ink-2); font-size: 15.5px; }
.never { color: var(--ok); }

pre.code { background: #20242c; color: #e8eaee; border-radius: 8px; padding: 16px 18px; overflow-x: auto; margin: 0; font-size: 14px; line-height: 1.55; position: relative; }
.code-wrap { position: relative; }
.code-wrap .copy { position: absolute; top: 8px; right: 8px; padding: 7px 12px; font-size: 13px; }

details.faq { border-top: 1px solid var(--rule-hair); }
details.faq summary { cursor: pointer; padding: 18px 44px; font: 600 19px/1.35 var(--serif); list-style: none; display: grid; grid-template-columns: 1fr auto; gap: 12px; }
details.faq summary::-webkit-details-marker { display: none; }
details.faq summary::after { content: "+"; color: var(--rule); font: 700 22px/1 var(--sans); }
details.faq[open] summary::after { content: "–"; }
details.faq > div { padding: 0 44px 22px; color: var(--ink-2); max-width: 75ch; }

.close { padding: 90px 0 60px; }
.close .page { background: var(--paper); color: var(--ink); padding: 44px; display: grid; grid-template-columns: 1.1fr 1fr; gap: 30px; align-items: center; }
.close h2 { font-size: clamp(30px, 3.6vw, 46px); line-height: 1.08; }
.close p { color: var(--ink-2); margin-top: 10px; }

footer.site { padding: 26px 0 40px; color: var(--ink-3); font-size: 14.5px; }
footer.site .wrap { display: flex; justify-content: space-between; gap: 18px; flex-wrap: wrap; border-top: 1px solid var(--rule-soft); padding-top: 22px; }
footer.site nav { display: flex; gap: 18px; flex-wrap: wrap; }
footer.site a { color: var(--ink-2); text-decoration: none; }
footer.site a:hover { color: var(--rule-ink); text-decoration: underline; }
.theme-toggle { border: 1px solid var(--rule-soft); background: var(--paper); color: var(--ink-2); border-radius: 6px; padding: 4px 10px; cursor: pointer; font: 600 13px var(--sans); }

/* reading pages (docs, changelog, privacy, security) */
.doc-cover { background: var(--desk); padding: 18px 0 110px; }
.doc { margin-top: -86px; }
.doc .page { display: grid; grid-template-columns: 260px minmax(0, 1fr); position: relative; }
.doc .page::before { content: ""; position: absolute; top: 0; bottom: 0; left: 260px; width: 1px; background: var(--rule-soft); }
.doc-nav { padding: 34px 26px 40px 30px; position: relative; }
.doc-nav nav { position: sticky; top: 24px; display: grid; gap: 2px; }
.doc-nav b { font-size: 12.5px; color: var(--ink-3); letter-spacing: .02em; margin: 14px 0 6px 10px; }
.doc-nav a { text-decoration: none; color: var(--ink-2); font-weight: 600; font-size: 14.5px; padding: 6px 10px; border-radius: 6px; }
.doc-nav a:hover { background: var(--blue-wash); color: var(--rule-ink); }
.doc-body { padding: 40px 56px 64px 46px; min-width: 0; }
.doc-body > header { border-bottom: 1px solid var(--rule-soft); padding-bottom: 20px; margin-bottom: 8px; }
.doc-body > header h1 { font-size: clamp(34px, 4vw, 52px); line-height: 1.05; }
.doc-body > header p { color: var(--ink-2); margin-top: 10px; max-width: 62ch; }
.prose { max-width: 74ch; }
.prose h2 { font-size: 28px; margin: 48px 0 12px; scroll-margin-top: 20px; }
.prose h3 { font-size: 20px; margin: 28px 0 8px; scroll-margin-top: 20px; }
.prose p, .prose ul, .prose ol { margin: 0 0 14px; }
.prose ul, .prose ol { padding-left: 1.2em; }
.prose li + li { margin-top: 5px; }
.prose li::marker { color: var(--rule); }
.prose code { background: var(--paper-2); padding: 2px 6px; border-radius: 4px; }
.prose pre code { background: none; padding: 0; }
.prose pre { margin: 0 0 16px; }
.prose table { border-collapse: collapse; width: 100%; margin: 0 0 18px; font-size: 15.5px; }
.prose th, .prose td { text-align: left; padding: 9px 12px 9px 0; border-bottom: 1px solid var(--rule-hair); vertical-align: top; }
.prose th { font-size: 13px; color: var(--ink-3); border-bottom: 1px solid var(--rule-soft); }
.note { background: var(--blue-wash); border-radius: 8px; padding: 14px 16px; margin: 0 0 16px; }
.note.warn { background: var(--hi-wash); color: var(--hi-ink); }
.release { padding: 6px 0 20px; }
.release h2 { display: flex; gap: 14px; align-items: baseline; flex-wrap: wrap; }
.release h2 small { font: 600 14px var(--sans); color: var(--ink-3); }

@media (max-width: 900px) {
  :root { --cue: 34%; }
  .topnav a:not(.keep) { display: none; }
  .topnav { flex-wrap: nowrap; }
  .sheet-head, .page-head { padding-left: 24px; padding-right: 24px; }
  .crow .c, .foot .c, .colheads span { padding-left: 24px; padding-right: 18px; }
  .crow .b, .foot .b, .colheads span + span { padding-left: 22px; padding-right: 24px; }
  .ticker { padding-left: 24px; padding-right: 24px; }
  .ledger td:first-child, .ledger th:first-child { padding-left: 24px; }
  .privacy-grid > div { padding-left: 24px; }
  details.faq summary, details.faq > div { padding-left: 24px; padding-right: 24px; }
  .close .page { grid-template-columns: 1fr; padding: 30px 24px; }
  .doc .page { grid-template-columns: 1fr; }
  .doc .page::before, .doc-nav { display: none; }
  .doc-body { padding: 30px 24px 48px; }
}
@media (max-width: 640px) {
  body { font-size: 16px; }
  .cornell::before, .clock { display: none; }
  .crow, .foot, .colheads { grid-template-columns: 1fr; }
  .colheads span + span { display: none; }
  .crow .c { padding-bottom: 0; color: var(--rule-ink); font-size: 15px; }
  .crow .b { padding-top: 6px; padding-left: 24px; }
  .foot .c { padding-bottom: 0; }
  .foot .b { padding-left: 24px; }
  .cover { padding-bottom: 48px; }
  main > section { padding-top: 52px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
  .cornell.live::before { background: var(--margin); }
}