/* LooseLeaf's site: the accounts service's pages and the Hub's (docs/design/11l).
 * One blue family (branding/icon-candidates/explore/palette-grid.png, row 1):
 * the mark's front page is --front, its middle page --mid, its back page --back.
 * Dark mode follows the system, and JupyterHub's own switch (data-bs-theme). */

@font-face {
  font-family: "Outfit";
  src: url("fonts/outfit.woff2") format("woff2");
  font-weight: 100 900;
  font-display: swap;
}
@font-face {
  font-family: "Instrument Sans";
  src: url("fonts/instrument-sans.woff2") format("woff2");
  font-weight: 400 700;
  font-display: swap;
}

:root {
  --front: #1a2850; --mid: #38569c; --back: #6a8bd2; --on-front: #ffffff;
  --bg: #f7f8fb; --surface: #ffffff; --soft: #edf1f9; --ink: #131a2c; --muted: #646c7e; --faint: #9da4b4;
  --line: #e6e9f0; --line-2: #d4d9e4;
  --ok: #2c7a4b; --bad: #b23a20; --bad-soft: #fbe8e3;
  --shadow: 0 1px 2px rgba(19, 26, 44, .04), 0 18px 48px rgba(26, 40, 80, .10);
  --display: "Outfit", "Instrument Sans", ui-sans-serif, system-ui, sans-serif;
  --font: "Instrument Sans", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "JetBrains Mono", Menlo, Consolas, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-bs-theme="light"]) {
    --front: #eef3fd; --mid: #b7c8ee; --back: #7d9be0; --on-front: #0f1318;
    --bg: #0f1318; --surface: #161b22; --soft: #1a2131; --ink: #e8ecf4; --muted: #98a1b3; --faint: #5f687a;
    --line: #242b36; --line-2: #323a48;
    --ok: #6fcf97; --bad: #f19a82; --bad-soft: #321a14;
    --shadow: 0 0 0 1px rgba(0, 0, 0, .3), 0 18px 48px rgba(0, 0, 0, .45);
    color-scheme: dark;
  }
}
:root[data-bs-theme="dark"] {
  --front: #eef3fd; --mid: #b7c8ee; --back: #7d9be0; --on-front: #0f1318;
  --bg: #0f1318; --surface: #161b22; --soft: #1a2131; --ink: #e8ecf4; --muted: #98a1b3; --faint: #5f687a;
  --line: #242b36; --line-2: #323a48;
  --ok: #6fcf97; --bad: #f19a82; --bad-soft: #321a14;
  --shadow: 0 0 0 1px rgba(0, 0, 0, .3), 0 18px 48px rgba(0, 0, 0, .45);
  color-scheme: dark;
}

* { box-sizing: border-box; }
body.ll { margin: 0; background: var(--surface); color: var(--ink); font: 15px/1.55 var(--font); -webkit-font-smoothing: antialiased; }
/* :where() keeps these below any class rule (a link styled as a button keeps its colours). */
:where(.ll) a { color: var(--mid); }
:where(.ll) :focus-visible { outline: 2px solid var(--back); outline-offset: 2px; }
:where(.ll) :is(code, .mono) { font-family: var(--mono); font-size: .88em; }
:where(.ll) .muted { color: var(--muted); }
:where(.ll) .ll-mark { width: 28px; height: 28px; flex: none; }

/* header and footer */
.s-head { display: flex; align-items: center; gap: 10px 24px; flex-wrap: wrap; max-width: 1120px; margin: 0 auto; padding: 16px 32px; }
.lockup { display: inline-flex; align-items: center; gap: 9px; text-decoration: none; color: inherit; }
.s-head .lockup { margin-right: auto; }
.wm { font: 600 1.32rem/1 var(--display); letter-spacing: -.01em; }
.wm-a { color: var(--mid); }
.wm-b { color: var(--back); }
.s-nav { display: flex; align-items: center; gap: 8px 22px; flex-wrap: wrap; }
.s-nav a { color: var(--muted); text-decoration: none; font-weight: 500; font-size: .93rem; }
.s-nav a:hover, .s-nav a.cur { color: var(--ink); }
.s-body { max-width: 1120px; margin: 0 auto; padding-inline: 32px; }
.s-foot { max-width: 1120px; margin: 28px auto 0; padding: 28px 32px 36px; display: flex; flex-wrap: wrap; gap: 10px 24px; align-items: center; color: var(--muted); font-size: .86rem; }
.s-foot .ll-mark { width: 18px; height: 18px; }
.s-foot .wm { font-size: .95rem; }
.s-foot a { color: var(--muted); text-decoration: none; }
.s-foot .lockup { margin-right: auto; }
.inline { display: inline; margin: 0; }
@media (max-width: 640px) { .s-head, .s-body, .s-foot { padding-inline: 16px; } }

/* buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 10px 18px; border-radius: 999px; border: 1px solid var(--front); background: var(--front); color: var(--on-front); font: 600 .93rem/1.2 var(--font); text-decoration: none; cursor: pointer; white-space: nowrap; }
.btn:hover { filter: brightness(1.12); color: var(--on-front); }
.btn.quiet { border-color: var(--line-2); background: transparent; color: var(--ink); }
.btn.sm { padding: 7px 14px; font-size: .86rem; }
.btn.block { width: 100%; }
.s-nav a.btn, .s-nav a.btn:hover { color: var(--on-front); }
.txt-btn { border: 0; background: none; color: var(--muted); font: inherit; font-size: .86rem; cursor: pointer; padding: 0; }
.txt-btn:hover { color: var(--ink); text-decoration: underline; }
.txt-btn.bad { color: var(--bad); }

/* landing */
.hero { padding-block: 72px 44px; display: grid; gap: 20px; justify-items: start; }
.hero h1 { margin: 0; font: 600 clamp(2.5rem, 1.4rem + 4.2vw, 4.4rem)/1.02 var(--display); letter-spacing: -.035em; text-wrap: balance; }
.hero h1 span { color: var(--back); }
.lead { font-size: 1.18rem; color: var(--muted); margin: 0; max-width: 52ch; }
.actions { display: flex; gap: 10px; flex-wrap: wrap; }
.stage { background: var(--soft); border-radius: 20px; padding: 44px 40px 0; overflow: hidden; }
.window { max-width: 860px; margin: 0 auto; background: var(--surface); border-radius: 12px 12px 0 0; box-shadow: var(--shadow); overflow: hidden; }
.window-bar { display: flex; align-items: center; gap: 10px; padding: 10px 14px; border-bottom: 1px solid var(--line); font-size: .82rem; color: var(--muted); }
.window-bar .k { margin-left: auto; display: flex; align-items: center; gap: 7px; color: var(--ink); }
.window-bar .ll-mark { width: 14px; height: 14px; }
.window-body { padding: 16px 16px 22px 4px; display: grid; gap: 8px; }
.cell { display: grid; grid-template-columns: 6px 54px minmax(0, 1fr); }
.cell .coll { grid-row: 1 / span 2; border-radius: 2px; }
.cell.active .coll { background: var(--mid); }
.cell .pr { font: 12px/1.6 var(--mono); color: var(--faint); text-align: right; padding: 7px 8px 0 0; white-space: nowrap; }
.cell .inp { grid-column: 3; border: 1px solid var(--line); background: var(--bg); border-radius: 4px; padding: 6px 10px; min-width: 0; }
.cell.active .inp { border-color: var(--back); }
.cell pre { margin: 0; font: 12.3px/1.6 var(--mono); white-space: pre; overflow-x: auto; }
.cell .state { grid-column: 3; display: flex; align-items: center; gap: 8px; font: 500 11.5px/1.4 var(--font); color: var(--mid); padding: 7px 2px 0; }
.cell .state .d { width: 6px; height: 6px; border-radius: 50%; background: var(--front); animation: ll-pulse 1.3s ease-in-out infinite; }
.cell .state b { font: 500 11px var(--mono); color: var(--muted); }
.k { color: #7b3fa0; } .s { color: #1f7a4d; }
@keyframes ll-pulse { 0%, 100% { opacity: 1; } 50% { opacity: .25; } }
.feats { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 28px; padding-block: 56px 20px; }
.feat h3 { margin: 12px 0 4px; font: 500 1.12rem var(--display); letter-spacing: -.01em; }
.feat p { margin: 0; color: var(--muted); }
.ficon { width: 36px; height: 36px; border-radius: 10px; background: var(--soft); display: grid; place-items: center; color: var(--mid); }
.ficon svg { width: 19px; height: 19px; }
.cta { margin-block: 48px 8px; padding: 40px 32px; border-radius: 20px; background: var(--front); color: var(--on-front); display: flex; flex-wrap: wrap; gap: 16px 24px; align-items: center; justify-content: space-between; }
.cta h2 { margin: 0; font: 600 1.7rem/1.15 var(--display); letter-spacing: -.02em; }
.cta .btn { background: var(--on-front); color: var(--front); border-color: var(--on-front); }
@media (max-width: 760px) { .feats { grid-template-columns: 1fr; gap: 22px; } }
@media (max-width: 640px) {
  .stage { padding: 20px 12px 0; border-radius: 14px; }
  .cell { grid-template-columns: 4px 34px minmax(0, 1fr); }
}

/* sign-in pages: one card on the page's ground */
.auth-page { background: var(--bg); min-height: calc(100vh - 64px); padding: 48px 18px 64px; display: grid; justify-items: center; align-content: start; gap: 26px; }
.auth-card { width: 100%; max-width: 360px; display: grid; gap: 14px; }
.auth-card h1 { font: 600 1.6rem/1.15 var(--display); letter-spacing: -.02em; margin: 0 0 4px; text-align: center; text-wrap: balance; }
.auth-card .sub { color: var(--muted); text-align: center; margin: -8px 0 6px; font-size: .93rem; }
.auth-card .sub b { color: var(--ink); font-weight: 600; }
.field { display: grid; gap: 5px; }
.field label { font-weight: 500; font-size: .85rem; color: var(--muted); }
.field .row { display: flex; justify-content: space-between; align-items: baseline; }
.field .row a { font-size: .82rem; text-decoration: none; }
.field input { width: 100%; padding: 10px 12px; border: 1px solid var(--line-2); border-radius: 10px; background: var(--surface); color: var(--ink); font: inherit; font-size: .95rem; }
.field input:focus { outline: 2px solid var(--back); outline-offset: 0; border-color: transparent; }
.auth-alt { font-size: .88rem; color: var(--muted); text-align: center; margin: 4px 0 0; }
.auth-alt a { text-decoration: none; font-weight: 500; }
.problem { background: var(--bad-soft); color: var(--bad); border-radius: 10px; padding: 9px 12px; font-size: .9rem; margin: 0; }
.mail { width: 52px; height: 52px; border-radius: 14px; background: var(--soft); display: grid; place-items: center; color: var(--mid); justify-self: center; }
.mail svg { width: 24px; height: 24px; }
.auth-card form { display: grid; gap: 14px; margin: 0; }

/* account and admin */
.ptitle { display: flex; flex-wrap: wrap; align-items: baseline; gap: 6px 14px; padding-block: 36px 26px; }
.ptitle h1 { margin: 0; font: 600 2rem/1.1 var(--display); letter-spacing: -.025em; }
.ptitle .end { margin-left: auto; align-self: center; }
.nums { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.nums.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.num { padding: 18px 20px; border-radius: 14px; background: var(--bg); display: grid; gap: 10px; align-content: start; }
.num .l { font-size: .84rem; color: var(--muted); }
.num .v { font: 600 1.75rem/1 var(--display); letter-spacing: -.02em; font-variant-numeric: tabular-nums; }
.num .v small { font: 500 .95rem var(--font); color: var(--muted); letter-spacing: 0; }
.meter { height: 6px; border-radius: 99px; background: var(--line); overflow: hidden; }
.meter i { display: block; height: 100%; background: var(--mid); border-radius: inherit; }
.bars { display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); gap: 5px; align-items: end; height: 30px; }
.bars i { display: block; background: var(--mid); border-radius: 3px; min-height: 3px; }
.bars i.zero { background: var(--line-2); }
.bars-x { display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); gap: 5px; font: 10.5px/1 var(--mono); color: var(--faint); text-align: center; }
@media (max-width: 760px) { .nums, .nums.two { grid-template-columns: 1fr; } }
.block-h { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin: 40px 0 8px; }
.block-h h2 { margin: 0; font: 600 1.15rem var(--display); letter-spacing: -.01em; }
.block-h span { font-size: .84rem; color: var(--muted); }
.tbl-wrap { overflow-x: auto; }
.tbl { width: 100%; border-collapse: collapse; font-size: .92rem; font-variant-numeric: tabular-nums; }
.tbl th { text-align: left; font-weight: 500; font-size: .8rem; color: var(--muted); padding: 10px 12px 10px 0; border-bottom: 1px solid var(--line); white-space: nowrap; }
.tbl td { padding: 12px 12px 12px 0; border-bottom: 1px solid var(--line); vertical-align: middle; white-space: nowrap; }
.tbl tr:last-child td { border-bottom: 0; }
.tbl .r { text-align: right; padding-right: 0; }
.tbl .sub { display: block; color: var(--muted); font-size: .8rem; }
.res { display: inline-flex; align-items: center; gap: 7px; }
.res i { width: 7px; height: 7px; border-radius: 50%; background: var(--ok); }
.res.bad i { background: var(--bad); }
.res.neutral i { background: var(--line-2); }
.empty { color: var(--muted); padding: 14px 0; margin: 0; }
.limits { display: flex; flex-wrap: wrap; gap: 8px 22px; margin: 34px 0 0; padding-top: 18px; border-top: 1px solid var(--line); font-size: .88rem; color: var(--muted); }
.limits b { color: var(--ink); font-weight: 600; }
.limits a { margin-left: auto; text-decoration: none; font-weight: 500; }
.search { width: 240px; max-width: 100%; padding: 8px 14px; border: 1px solid var(--line-2); border-radius: 999px; background: var(--surface); color: var(--ink); font: inherit; font-size: .88rem; }
.ubar { display: flex; align-items: center; gap: 10px; min-width: 170px; }
.ubar .meter { flex: 1; }
.ubar.hot .meter i { background: var(--bad); }
.ubar b { font-weight: 600; min-width: 48px; text-align: right; }
.tag { font-size: .76rem; color: var(--muted); border: 1px solid var(--line-2); border-radius: 99px; padding: 1px 8px; white-space: nowrap; }
.tag.bad { color: var(--bad); border-color: var(--bad); }

/* a page that says one thing */
.say { max-width: 520px; margin: 0 auto; padding: 72px 18px 80px; display: grid; gap: 14px; justify-items: start; }
.say h1 { margin: 0; font: 600 1.8rem/1.15 var(--display); letter-spacing: -.02em; text-wrap: balance; }
.say p { margin: 0; color: var(--muted); }
.say ul { margin: 0; padding-left: 18px; color: var(--muted); display: grid; gap: 4px; }
.say .actions { margin-top: 6px; }

/* the Hub's pages: starting, not running, an error */
.hub-say { min-height: calc(100vh - 80px); display: grid; place-content: center; justify-items: center; gap: 18px; padding: 48px 18px 96px; text-align: center; }
.hub-say .ll-mark { width: 44px; height: 44px; }
.hub-say h1 { margin: 0; font: 500 1.3rem/1.25 var(--display); letter-spacing: -.01em; }
.hub-say p { margin: 0; color: var(--muted); max-width: 46ch; }
.ll-progress { width: 220px; height: 4px; border-radius: 99px; background: var(--line); overflow: hidden; }
.ll-progress i { display: block; height: 100%; width: 40%; background: var(--mid); border-radius: inherit; animation: ll-slide 1.6s ease-in-out infinite; }
.ll-progress.failed i { width: 100%; background: var(--bad); animation: none; }
@keyframes ll-slide { 0% { transform: translateX(-100%); } 100% { transform: translateX(250%); } }

@media (prefers-reduced-motion: reduce) {
  .cell .state .d, .ll-progress i { animation: none; }
}