/* app/public/css/lab.css */
:root {
  --paper: #F6F8F9; --panel: #FFFFFF; --ink: #1C2733; --muted: #5A6B7C; --faint: #8B99A7; --hairline: #D8DEE4;
  --hot: #B3372B; --hot-soft: rgba(179,55,43,.10); --cool: #0E8A63; --cool-soft: rgba(14,138,99,.10);
  --flow: #2563EB; --flow-soft: rgba(37,99,235,.10); --chip: #EDF1F4;
  --oracle-red: #C74634; --oracle-ink: #161513;
  --sans: 'Public Sans', 'Segoe UI', system-ui, sans-serif; --head: 'Bricolage Grotesque', var(--sans); --mono: 'IBM Plex Mono', ui-monospace, monospace;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #131A22; --panel: #1A232E; --ink: #E8EDF2; --muted: #93A3B4; --faint: #6B7B8C; --hairline: #26313D;
    --hot: #E06552; --hot-soft: rgba(224,101,82,.14); --cool: #21A57F; --cool-soft: rgba(33,165,127,.14);
    --flow: #60A5FA; --flow-soft: rgba(96,165,250,.16); --chip: #222D39;
  }
}
:root[data-theme="dark"] {
  --paper: #131A22; --panel: #1A232E; --ink: #E8EDF2; --muted: #93A3B4; --faint: #6B7B8C; --hairline: #26313D;
  --hot: #E06552; --hot-soft: rgba(224,101,82,.14); --cool: #21A57F; --cool-soft: rgba(33,165,127,.14);
  --flow: #60A5FA; --flow-soft: rgba(96,165,250,.16); --chip: #222D39;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; } /* #console sets display: grid, which would otherwise beat the hidden attribute */
html, body { margin: 0; height: 100%; background: var(--paper); color: var(--ink); font: 15px/1.5 var(--sans); }
header.top { display: flex; align-items: center; gap: 16px; padding: 10px 24px; border-top: 3px solid var(--oracle-red); border-bottom: 1px solid var(--hairline); background: var(--panel); }
header.top .brand { display: flex; align-items: center; gap: 12px; font: 700 15px var(--head); color: var(--ink); text-decoration: none; }
header.top .lab-name { padding-left: 12px; border-left: 1px solid var(--hairline); }
header.top .product { font: 13px var(--sans); color: var(--muted); }
header.top .who { margin-left: auto; font: 12px var(--mono); color: var(--muted); }
main#view { padding: 20px 24px 64px; max-width: 1180px; margin: 0 auto; }
body.dock-pinned main#view { padding-bottom: calc(clamp(280px, 45vh, 60vh) + 24px); }
h1, h2, h3 { font-family: var(--head); margin: 0 0 8px; }
h1 { font-size: 30px; font-weight: 800; }
.kicker { font: 600 12px var(--mono); letter-spacing: .12em; text-transform: uppercase; color: var(--cool); }
.problem { color: var(--muted); max-width: 72ch; }
.knobs { display: flex; flex-wrap: wrap; gap: 8px; margin: 10px 0 14px; }
.knob { font: 12px var(--mono); background: var(--chip); border-radius: 16px; padding: 3px 11px; color: var(--muted); }
.knob b { color: var(--ink); } .knob.hot { background: var(--hot-soft); color: var(--hot); } .knob.hot b { color: var(--hot); }
.patterns { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 14px; }
.pcard { display: block; text-decoration: none; color: inherit; background: var(--panel); border: 1px solid var(--hairline); border-left: 4px solid var(--cool); border-radius: 10px; padding: 14px 16px; }
.pcard:hover { border-color: var(--muted); }
.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--hairline); margin: 14px 0; flex-wrap: wrap; }
.tabs button { font: 600 13px var(--sans); background: none; border: 0; border-bottom: 2px solid transparent; padding: 8px 12px; color: var(--muted); cursor: pointer; }
.tabs button.on { color: var(--ink); border-bottom-color: var(--cool); }
.card { background: var(--panel); border: 1px solid var(--hairline); border-radius: 10px; padding: 12px 14px; margin-bottom: 12px; }
.card h3 { font-size: 15px; font-weight: 700; }
.card .note { color: var(--muted); font-size: 13.5px; margin: 0 0 8px; }
.card.measure { border-left: 3px solid var(--flow); }
pre.code { font: 12.5px/1.5 var(--mono); background: var(--chip); border-radius: 6px; padding: 10px 12px; overflow-x: auto; margin: 0 0 8px; white-space: pre; }
.actions { display: flex; gap: 8px; align-items: center; }
button.btn, a.btn { display: inline-block; text-decoration: none; font: 600 13px var(--sans); color: var(--ink); background: var(--panel); border: 1px solid var(--hairline); border-radius: 7px; padding: 5px 12px; cursor: pointer; }
button.btn:hover, a.btn:hover { border-color: var(--muted); } button.btn.primary, a.btn.primary { background: var(--cool); color: #fff; border-color: var(--cool); }
button.btn:disabled { opacity: .5; cursor: default; }
.badge { font: 600 11px var(--mono); border-radius: 12px; padding: 2px 9px; display: inline-block; margin-bottom: 6px; }
.badge.cool { background: var(--cool-soft); color: var(--cool); } .badge.hot { background: var(--hot-soft); color: var(--hot); }
.result { margin: 6px 0; } .result .msg { font: 13px var(--mono); } .result.error .msg { color: var(--hot); }
.rmeta { font: 11.5px var(--mono); color: var(--faint); margin-top: 4px; }
table.grid { border-collapse: collapse; font: 12.5px var(--mono); width: 100%; }
table.grid th, table.grid td { border-bottom: 1px solid var(--hairline); padding: 4px 8px; text-align: left; vertical-align: top; }
table.grid th { color: var(--faint); font-weight: 600; }
details.jt { font: 12.5px var(--mono); margin-left: 12px; } details.jt > summary { cursor: pointer; color: var(--muted); }
.jv { margin-left: 24px; font: 12.5px var(--mono); } .jk { color: var(--flow); } .jval.string { color: var(--cool); } .jnull { color: var(--faint); }
#console { position: fixed; left: 0; right: 0; bottom: 0; height: clamp(280px, 45vh, 60vh); background: var(--panel); border-top: 1px solid var(--hairline);
  display: grid; grid-template-rows: auto 1fr; transform: translateY(calc(100% - 42px)); transition: transform 180ms ease; box-shadow: 0 -6px 18px rgba(0,0,0,.08); z-index: 20; }
#console.expanded { transform: translateY(0); }
#console .dock-toggle, #console .dock-pin { font: 600 12px var(--sans); background: none; border: 0; color: var(--muted); cursor: pointer; padding: 4px 6px; }
#console .dock-pin[aria-pressed="true"] { color: var(--cool); }
#console.busy .dock-toggle::after { content: ' · running'; color: var(--flow); }
@media (prefers-reduced-motion: reduce) { #console { transition: none; } }
#console .bar { display: flex; align-items: center; gap: 8px; padding: 6px 16px; border-bottom: 1px solid var(--hairline); }
#console .bar .tabs { border: 0; margin: 0; }
#console .status { margin-left: auto; font: 12px var(--mono); color: var(--muted); }
#console .panes { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); min-height: 0; }
#console .editor { border-right: 1px solid var(--hairline); overflow: auto; min-height: 0; }
#console .out { overflow: auto; padding: 8px 14px; min-height: 0; }
.cm-editor { height: 100%; font-size: 13px; } .cm-editor .cm-content { font-family: var(--mono); }
.measure-grid { display: grid; grid-template-columns: minmax(0, 3fr) minmax(0, 2fr); gap: 18px; margin-top: 10px; }
.measure-grid.no-curve { grid-template-columns: 1fr; }
@media (max-width: 900px) { .measure-grid { grid-template-columns: 1fr; } }
.measure-out svg.curve { width: 100%; height: auto; display: block; }
.deck-thumb { display: flex; gap: 10px; align-items: center; margin-top: 8px; background: var(--chip); border: 1px solid var(--hairline); border-radius: 8px; padding: 6px; cursor: zoom-in; color: var(--muted); font: 12px var(--sans); text-align: left; width: 100%; }
.deck-thumb img { width: 120px; height: auto; border-radius: 4px; background: var(--paper); }
.stat { display: grid; grid-template-columns: 150px minmax(0, 1fr) 56px; gap: 8px; align-items: center; padding: 6px 0; border-bottom: 1px solid var(--hairline); }
.stat-name { font: 12.5px var(--mono); color: var(--ink); }
.stat-line { display: flex; align-items: center; gap: 6px; height: 16px; }
.stat-bar { display: inline-block; height: 10px; border-radius: 3px; } .stat-bar.hot { background: var(--hot); } .stat-bar.cool { background: var(--cool); }
.stat-val { font: 11.5px var(--mono); color: var(--muted); white-space: nowrap; }
.stat-ratio { font: 700 13px var(--mono); text-align: right; }
.stat-legend { display: flex; gap: 14px; } .stat-legend .key::before { content: ''; display: inline-block; width: 10px; height: 10px; border-radius: 2px; margin-right: 5px; vertical-align: -1px; }
.stat-legend .key.hot::before { background: var(--hot); } .stat-legend .key.cool::before { background: var(--cool); }
.what-happened { margin-top: 14px; background: var(--flow-soft); border-radius: 8px; padding: 10px 14px; font-size: 13.5px; }
.what-happened h4 { margin: 0 0 4px; font: 700 13px var(--head); } .what-happened p { margin: 2px 0; }
.signin { max-width: 420px; margin: 60px auto; background: var(--panel); border: 1px solid var(--hairline); border-radius: 12px; padding: 22px; }
.signin label { display: block; font-size: 13px; color: var(--muted); margin-top: 10px; }
.signin input { width: 100%; font: 15px var(--sans); padding: 7px 10px; border: 1px solid var(--hairline); border-radius: 7px; background: var(--paper); color: var(--ink); }
.signin .btn { margin-top: 16px; }
.signin-alt { margin: 18px 0 0; padding-top: 14px; border-top: 1px solid var(--hairline); font-size: 13px; color: var(--muted); }
.signin-alt a { color: var(--flow); }
.flash { color: var(--hot); font-size: 13px; margin-top: 8px; }
@media (max-width: 800px) { #console .panes { grid-template-columns: 1fr; } }
.help-i { font: 13px var(--sans); line-height: 1; background: none; border: 0; color: var(--faint); cursor: pointer; padding: 2px 4px; border-radius: 50%; vertical-align: middle; }
.help-i:hover, .help-i[aria-expanded="true"] { color: var(--flow); }
.help-i:focus-visible { outline: 2px solid var(--flow); outline-offset: 1px; }
.help-pop { position: absolute; z-index: 40; max-width: 420px; max-height: min(70vh, 520px); overflow: auto; background: var(--panel); color: var(--ink);
  border: 1px solid var(--hairline); border-left: 3px solid var(--flow); border-radius: 10px; padding: 10px 14px; box-shadow: 0 10px 28px rgba(0,0,0,.18); font-size: 13.5px; }
.help-pop.has-fig { width: min(760px, 92vw); max-width: min(760px, 92vw); max-height: min(88vh, 820px); }
.help-pop p { margin: 2px 0 8px; }
.help-pop .help-title { font: 700 14px var(--head); margin-bottom: 4px; }
.help-pop .help-k { font: 600 10.5px var(--mono); letter-spacing: .1em; text-transform: uppercase; color: var(--muted); }
.help-pop .help-fig { margin: 6px 0 0; }
.help-pop .help-fig a { display: block; }
.help-pop .help-fig img { width: 100%; height: auto; display: block; border-radius: 6px; background: var(--paper); }
.help-pop .help-fig figcaption { font-size: 12px; color: var(--muted); margin-top: 4px; }
.help-pop .help-fig-open { display: inline-block; margin: 2px 0 6px; font: 600 12px var(--sans); color: var(--flow); text-decoration: none; }
.help-pop .help-fig-open:hover { text-decoration: underline; }
.card h3 .help-i, .tabs .help-i, .knob .help-i { margin-left: 4px; }

/* ---- Oracle brand chrome ------------------------------------------------------------
   The wordmark is Oracle's official file (red on light only, never recoloured). In dark mode
   it sits on a light chip. Oracle red is brand chrome only: in the lab's content red means
   "rewritten" and green "converged", so neither colour is borrowed for decoration. */
.oracle-logo { display: block; height: 15px; width: auto; }
.oracle-logo.big { height: 32px; }
.logo-chip { display: inline-flex; align-items: center; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .logo-chip:not(.on-light) { background: #fff; padding: 4px 8px; border-radius: 4px; } }
:root[data-theme="dark"] .logo-chip:not(.on-light) { background: #fff; padding: 4px 8px; border-radius: 4px; }

/* Landing pages (attendee and instructor sign-in): the brand panel beside the form. The
   panel stays light in both themes, because it carries the red wordmark. */
.landing { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); max-width: 1000px; margin: 48px auto; background: var(--panel); border: 1px solid var(--hairline); border-radius: 14px; overflow: hidden; }
.landing-brand { position: relative; padding: 44px 44px 32px 56px; background: #FBFAF9; color: var(--oracle-ink); }
.landing-brand::before { content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 8px; background: var(--oracle-red); }
.landing-title { font: 800 40px/1.06 var(--head); letter-spacing: -0.01em; color: var(--oracle-ink); margin: 40px 0 10px; }
.landing-lede { font: 600 19px/1.3 var(--head); color: var(--oracle-ink); margin: 0 0 14px; }
.landing-note { color: #45403C; font-size: 15px; max-width: 46ch; margin: 0; }
.landing-foot { margin: 36px 0 0; font-size: 12.5px; color: #6F6A66; }
.landing .signin { margin: 0; max-width: none; border: 0; border-radius: 0; padding: 44px 40px; align-self: center; }
@media (max-width: 760px) {
  .landing { grid-template-columns: 1fr; margin: 16px; }
  .landing-brand { padding: 28px 24px 24px 32px; }
  .landing-title { font-size: 32px; margin-top: 28px; }
  .landing .signin { padding: 28px 24px; }
}

/* Home and admin hero: the landing's red bar, small. */
.hero { position: relative; padding: 6px 0 4px 20px; margin: 4px 0 18px; }
.hero::before { content: ''; position: absolute; left: 0; top: 8px; bottom: 6px; width: 5px; border-radius: 3px; background: var(--oracle-red); }
.hero .problem { margin-bottom: 0; }