/* Python Geolab: one stylesheet for the site, the player and the data viewer.
   Colors come from the logo (pencil-sketch paper, graphite, Python blue and yellow, map-pin orange).
   Light tokens on :root, redefined for dark mode. */
:root {
  --paper: #f4f1eb; --surface: #fcfbf8; --ink: #2d2b27; --muted: #64605a; --line: #ddd8ce;
  --accent: #335f83; --accent-ink: #ffffff; --accent-soft: #e4ebf1;
  --yellow: #decd80; --yellow-soft: #f6efd2; --orange: #a35a24; --orange-soft: #f6e6da;
  --py-blue: #306998; --py-blue-text: #306998; --py-yellow: #ffd43b;
  --loop: #6f45b8; --loop-soft: #eee7f9; --cond: #965a12; --cond-soft: #f8ecd8;
  --ok: #2f6e45; --ok-soft: #e1eedf; --warn: #a2580d; --warn-soft: #f8ead6; --bad: #a93a32; --bad-soft: #f6e1dd;
  --code-bg: #f8f6f1; --sel: #f6efd2; --nodata: #cbc7bf;
  --f-body: "Atkinson Hyperlegible", "Segoe UI", system-ui, sans-serif;
  --f-mono: "JetBrains Mono", ui-monospace, "Cascadia Mono", Consolas, monospace;
  --ind: 1.75rem; --radius: 8px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #1c1b18; --surface: #252420; --ink: #ece8df; --muted: #a9a397; --line: #3a3832;
    --accent: #8db3d1; --accent-ink: #13202a; --accent-soft: #233240;
    --yellow: #decd80; --yellow-soft: #3a3420; --orange: #e0a072; --orange-soft: #3b2a1f;
    --py-blue: #306998; --py-blue-text: #7cb0e0; --py-yellow: #ffd43b;
    --loop: #b796ee; --loop-soft: #282140; --cond: #e2a24e; --cond-soft: #382a16;
    --ok: #7cc493; --ok-soft: #1d3124; --warn: #e6a04c; --warn-soft: #382915; --bad: #eb8a7d; --bad-soft: #3b211e;
    --code-bg: #201f1b; --sel: #4a4120; --nodata: #45423b; color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--f-body); font-size: 16px; line-height: 1.5; }
h1, h2, h3 { text-wrap: balance; line-height: 1.2; margin: 0; }
h1 { font-size: 1.75rem; }
h2 { font-size: 1.2rem; }
h3 { font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); }
p { margin: 0; }
a { color: var(--accent); }
code, .mono { font-family: var(--f-mono); font-size: 0.88em; }
/* No programming ligatures in the code font: "<=" must stay "<=" (not "≤"), like "!=", "==", "->"…
   Students have to see exactly the characters they type. */
code, pre, kbd, samp, textarea, .mono, .cl, .cl input, .gutter, .console textarea, .pair select,
.dataset .kind, .dataset .file, .data td.num, .data td.rn, .column-card .column-name, .kv dd, .hist text,
.ramp-legend, .hover, .stat b { font-variant-ligatures: none; font-feature-settings: "calt" 0, "liga" 0; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
[hidden] { display: none !important; }
.small { font-size: 0.85rem; color: var(--muted); }
.eyebrow { font-size: 0.8rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); }

/* ---------- Site layout ---------- */
.site-head { background: var(--surface); border-bottom: 1px solid var(--line); box-shadow: inset 0 -3px 0 -1px var(--yellow); }
.site-head .in { max-width: 1240px; margin: 0 auto; padding-block: 10px;
  padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px));
  display: flex; flex-wrap: wrap; gap: 8px 20px; align-items: center; justify-content: space-between; }
.brand { font-weight: 700; text-decoration: none; color: var(--ink); display: flex; gap: 8px; align-items: center; }
.brand img { width: 36px; height: 36px; border-radius: 50%; margin-right: 2px; }
.brand { font-size: 1.05rem; }
.brand:hover .brand-name { text-decoration: underline; text-underline-offset: 3px; }
.nav { display: flex; flex-wrap: wrap; gap: 4px 14px; align-items: center; font-size: 0.95rem; }
.nav a { text-decoration: none; color: var(--muted); }
.nav a:hover { color: var(--accent); }
.nav a.btn, .nav a.btn:hover { color: var(--accent-ink); }
.nav form { display: inline; }
.wrap { max-width: 1240px; margin: 0 auto; padding-block: 24px 64px;
  padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px));
  display: grid; gap: 20px; }
/* Text pages: a readable width, aligned on the left edge like the header (not centred, which looked shifted). */
.wrap.narrow > * { max-width: 760px; }
.site-foot { border-top: 1px solid var(--line); }
.site-foot .in { max-width: 1240px; margin: 0 auto; padding-block: 16px; font-size: 0.85rem; color: var(--muted);
  padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px));
  display: flex; gap: 16px; flex-wrap: wrap; }
.messages { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; }
.messages li { border-radius: 6px; padding: 10px 14px; background: var(--accent-soft); }
.messages li.success { background: var(--ok-soft); color: var(--ok); }
.messages li.error { background: var(--bad-soft); color: var(--bad); }

.panel { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; display: grid; gap: 14px; min-width: 0; }
.panel-head { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: baseline; gap: 8px; }
.btn { display: inline-block; border: 1px solid var(--accent); background: var(--accent); color: var(--accent-ink); border-radius: 6px;
  padding: 8px 16px; font-weight: 700; text-decoration: none; }
.btn.ghost { background: transparent; color: var(--accent); }
.btn.sm { padding: 4px 10px; font-size: 0.85rem; }
.btn.danger { background: var(--bad); border-color: var(--bad); color: #fff; }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.linkbtn { border: 0; background: none; color: var(--accent); text-decoration: underline; padding: 0; font-size: inherit; }
.actions { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }

/* Forms (including account pages) */
form p, .field { display: grid; gap: 4px; margin: 0 0 12px; }
label { font-weight: 700; font-size: 0.92rem; }
input[type=text], input[type=email], input[type=password], input[type=number], input:not([type]), select, textarea {
  border: 1px solid var(--line); border-radius: 6px; background: var(--surface); padding: 8px 10px; width: 100%; max-width: 420px; }
form button[type=submit], form input[type=submit] { border: 1px solid var(--accent); background: var(--accent); color: var(--accent-ink);
  border-radius: 6px; padding: 8px 16px; font-weight: 700; }
form button.linkbtn[type] { border: 0; background: none; color: var(--accent); padding: 0; font-size: inherit; font-weight: inherit; }
.nav form button.linkbtn[type] { color: var(--muted); text-decoration: none; }
.nav form button.linkbtn[type]:hover { color: var(--accent); }
.helptext, form ul.errorlist { font-size: 0.85rem; color: var(--muted); }
ul.errorlist { color: var(--bad) !important; list-style: none; padding: 0; margin: 4px 0; }
/* Sign in, sign up, password…: a centred card. */
.wrap.auth { width: min(460px, calc(100% - 32px)); max-width: none; margin: 48px auto 64px; padding: 28px 32px;
  background: var(--surface); border: 1px solid var(--line); border-radius: 12px; gap: 14px;
  box-shadow: 0 1px 2px rgb(0 0 0 / 4%), 0 8px 24px rgb(0 0 0 / 5%); }
.wrap.auth h1 { text-align: center; margin-bottom: 4px; }
.wrap.auth input:not([type=checkbox]):not([type=radio]) { max-width: none; }
.wrap.auth form button[type=submit] { width: 100%; padding-block: 10px; }
/* A checkbox next to its label ("Remember me"), not stretched across the line. */
form p:has(> input[type=checkbox]) { display: flex; flex-direction: row-reverse; justify-content: flex-end; align-items: center; gap: 8px; }
form p:has(> input[type=checkbox]) label { font-weight: 400; }
@media (max-width: 520px) { .wrap.auth { margin-top: 20px; padding: 20px 18px; } }

/* ---------- Home ---------- */
.hero { display: grid; grid-template-columns: minmax(0, 266px) minmax(0, 1fr); gap: 24px 48px; align-items: center; padding-block: 24px; }
@media (max-width: 760px) { .hero { grid-template-columns: minmax(0, 1fr); justify-items: center; padding-block: 8px; } }
.hero-logo { display: block; width: 100%; max-width: 266px; }
.hero-logo img { display: block; width: 100%; height: auto; border-radius: 50%; }
@media (max-width: 760px) { .hero-logo { max-width: 50vw; } }
.hero-text { display: grid; gap: 16px; max-width: 62ch; }
.hero-text h1 { font-size: clamp(2rem, 5vw, 3rem); }
.hero-text .eyebrow { color: var(--orange); font-weight: 700; }
.intro { display: grid; gap: 12px; font-size: 1.08rem; }

/* ---------- Catalog ---------- */
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.catalog-head { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: flex-end; gap: 12px 24px; }
.btn.continue { display: grid; gap: 2px; text-align: left; max-width: 100%; }
.btn.continue span { font-weight: 400; font-size: 0.85rem; overflow-wrap: anywhere; }
.search { display: flex; gap: 8px; }
.search input { max-width: none; flex: 1 1 auto; min-width: 0; }
.search button { flex: none; }
.module-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 14px; }
.module-card { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 14px; align-items: start;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px;
  color: var(--ink); text-decoration: none; }
.module-card:hover { border-color: var(--accent); }
.module-card:hover strong { color: var(--accent); }
.module-num { width: 2.2rem; height: 2.2rem; border-radius: 50%; display: grid; place-items: center; font-weight: 700;
  background: var(--yellow-soft); border: 2px solid var(--yellow); }
.module-body { display: grid; gap: 6px; }
.module-body strong { font-size: 1.05rem; line-height: 1.25; }
.progress { display: flex; align-items: center; gap: 10px; }
.progress .bar { flex: 1 1 auto; max-width: 220px; }
.crumbs a { color: var(--muted); }
.filters { display: flex; flex-wrap: wrap; gap: 10px 16px; align-items: flex-end; }
.filters label { display: grid; gap: 4px; font-size: 0.85rem; }
.filters select { width: auto; }
.filters button[type=submit] { padding: 7px 14px; }
.pager-modules { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 16px; }
.modules { display: grid; gap: 18px; }
.mod-head { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 6px 16px; align-items: baseline; }
.badge { display: inline-block; font-size: 0.72rem; border-radius: 99px; padding: 2px 10px; font-weight: 700;
  background: var(--accent-soft); color: var(--accent); letter-spacing: 0.02em; }
.badge.paid { background: var(--cond-soft); color: var(--cond); }
/* Premium: content reserved for members (gold, with a star). */
.badge.premium { background: var(--yellow-soft); color: var(--cond); border: 1px solid var(--yellow); }
.badge.premium::before, .premium-label::before { content: "★ "; }
.premium-label { color: var(--cond); font-weight: 700; }
.badge.done { background: var(--ok-soft); color: var(--ok); }
.badge.in-progress { background: var(--warn-soft); color: var(--warn); }
.exercise-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.exercise-row { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 4px 12px; align-items: center;
  border: 1px solid var(--line); border-radius: 6px; padding: 10px 14px; background: var(--surface); }
.exercise-row a { font-weight: 700; text-decoration: none; }
.exercise-row .meta { grid-column: 1 / -1; font-size: 0.82rem; color: var(--muted); }
.exercise-row .tags { grid-column: 1 / -1; display: flex; flex-wrap: wrap; gap: 4px; }
.locked-icon::before { content: "🔒 "; }

/* ---------- Exercise player ---------- */
.player { display: grid; grid-template-columns: minmax(0, 1fr); gap: 20px; }
.top { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 8px 16px; }
.steps { display: flex; gap: 6px; flex-wrap: wrap; }
.step-pill { font-size: 0.85rem; padding: 4px 12px; border-radius: 99px; border: 1px solid var(--line); color: var(--muted); background: var(--surface); }
.step-pill.on { border-color: var(--accent); color: var(--accent); font-weight: 700; }
.step-pill.done { border-color: var(--ok); color: var(--ok); }
.md { display: grid; gap: 10px; }
.md ul { margin: 0; padding-left: 20px; display: grid; gap: 4px; }
.alert { border-radius: 6px; padding: 12px 14px; background: var(--warn-soft); color: var(--warn); display: grid; gap: 4px; }
.alert.bad { background: var(--bad-soft); color: var(--bad); }
.videos { display: flex; flex-wrap: wrap; gap: 8px; }
.videos a { font-size: 0.9rem; }
.feedback { border-radius: 6px; padding: 12px 14px; font-size: 0.95rem; display: grid; gap: 6px; }
.feedback:empty { display: none; }
.feedback.info { background: var(--accent-soft); }
.feedback.bad { background: var(--bad-soft); }
.feedback.good { background: var(--ok-soft); color: var(--ok); }
.note { grid-column: 1 / -1; font-size: 0.85rem; border-radius: 4px; padding: 4px 8px; }
.note:empty { display: none; }

/* Plan and order */
.plan-grid { display: grid; grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr); gap: 16px; }
@media (max-width: 760px) { .plan-grid { grid-template-columns: minmax(0, 1fr); } }
.zone { display: grid; gap: 8px; align-content: start; min-width: 0; }
.zone-box { border: 1px dashed var(--line); border-radius: var(--radius); padding: 10px; min-height: 180px; background: var(--code-bg); }
.zone-box.mine { border-style: solid; border-color: var(--accent); }
.blocks { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; min-height: 160px; }
.blk { position: relative; display: grid; grid-template-columns: auto minmax(0, 1fr) auto; align-items: center; gap: 8px;
  background: var(--surface); border: 1px solid var(--line); border-radius: 6px; padding: 6px 8px; font-size: 0.95rem; }
.mine .blk { margin-left: calc(var(--n, 0) * var(--ind)); }
.mine .blk::before { content: ""; position: absolute; top: -4px; bottom: -4px; right: 100%; width: calc(var(--n, 0) * var(--ind));
  background: repeating-linear-gradient(to right, transparent 0 calc(var(--ind) * 0.45), var(--line) calc(var(--ind) * 0.45) calc(var(--ind) * 0.45 + 2px), transparent calc(var(--ind) * 0.45 + 2px) var(--ind)); }
.blk.k-loop { background: var(--loop-soft); border-color: var(--loop); }
.blk.k-if, .blk.k-elif, .blk.k-else { background: var(--cond-soft); border-color: var(--cond); }
.blk .tag { font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.06em; font-weight: 700; margin-right: 6px; }
.blk.k-loop .tag { color: var(--loop); }
.blk.k-if .tag, .blk.k-elif .tag, .blk.k-else .tag { color: var(--cond); }
.grip { cursor: grab; color: var(--muted); user-select: none; padding: 2px; letter-spacing: -2px; }
.ctl { display: flex; gap: 2px; }
.ctl button { border: 1px solid transparent; background: transparent; color: var(--muted); border-radius: 4px; min-width: 28px; height: 28px; padding: 0 4px; font-size: 0.9rem; }
.ctl button:hover { background: var(--accent-soft); color: var(--accent); }
.ctl .add { border-color: var(--line); color: var(--accent); font-size: 0.8rem; padding: 0 8px; }
.blk.struct { outline: 2px solid var(--warn); }
.blk.struct .note { background: var(--warn-soft); color: var(--warn); }
.blk.err { outline: 2px solid var(--bad); }
.blk.err .note { background: var(--bad-soft); color: var(--bad); }
.locked .ctl, .locked .grip { display: none; }
.locked .blk { grid-template-columns: minmax(0, 1fr); }
.sortable-ghost { opacity: 0.4; }
.trace-wrap { overflow-x: auto; }
table.trace { border-collapse: collapse; width: 100%; font-size: 0.88rem; font-variant-numeric: tabular-nums; }
.trace caption { text-align: left; caption-side: top; padding-bottom: 8px; }
.trace th, .trace td { text-align: left; padding: 5px 10px; border-bottom: 1px solid var(--line); white-space: nowrap; }
.trace th { color: var(--muted); font-weight: 400; font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.05em; }
.trace td.chg { background: var(--accent-soft); font-weight: 700; }

/* Classify, match, choose */
.items { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.item { border: 1px solid var(--line); border-radius: 6px; padding: 10px 12px; display: grid; gap: 8px; background: var(--surface); }
.item.err { outline: 2px solid var(--bad); }
.item.ok { outline: 2px solid var(--ok); }
.item .note { grid-column: auto; }
.item.err .note { background: var(--bad-soft); color: var(--bad); }
.item.ok .note { background: var(--ok-soft); color: var(--ok); }
.pills { display: flex; flex-wrap: wrap; gap: 6px; }
.pills button { border: 1px solid var(--line); background: var(--surface); border-radius: 99px; padding: 4px 12px; font-size: 0.88rem; color: var(--muted); }
.pills button[aria-pressed="true"] { border-color: var(--accent); background: var(--accent); color: var(--accent-ink); font-weight: 700; }
.feeling { display: grid; gap: 8px; border-top: 1px solid var(--line); padding-top: 12px; }
.category-legend { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 8px; }
.category-legend div { font-size: 0.85rem; border-left: 3px solid var(--accent); padding-left: 8px; }
.pair { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 8px 16px; align-items: center; }
@media (max-width: 700px) { .pair { grid-template-columns: minmax(0, 1fr); } }
.pair select { max-width: 100%; font-family: var(--f-mono); font-size: 0.85rem; }
.pair .note { grid-column: 1 / -1; }
.groups { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 10px; }
.group { border: 1px solid var(--line); border-radius: 6px; padding: 10px; display: grid; gap: 8px; align-content: start; background: var(--code-bg); }
.group input { max-width: 100%; }
.options { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.option { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 4px 10px; align-items: start;
  border: 1px solid var(--line); border-radius: 6px; padding: 10px 12px; background: var(--surface); }
.option input { margin-top: 4px; }
.option label { font-weight: 400; }
.option.err { outline: 2px solid var(--bad); }
.option.err .note { background: var(--bad-soft); color: var(--bad); }

/* Code */
.cloze { border: 1px solid var(--line); border-radius: 6px; background: var(--code-bg); overflow-x: auto; padding-block: 8px; }
.cl { display: flex; align-items: center; width: max-content; min-width: 100%; font-family: var(--f-mono); font-size: 14px; line-height: 1.9; }
.cl .ln { flex: none; width: 3rem; text-align: right; padding-right: 12px; color: var(--muted); user-select: none; }
.cl .seg { white-space: pre; }
.cl .cmt { color: var(--muted); }
.cl input { font: inherit; color: var(--ink); background: var(--accent-soft); border: 0; border-bottom: 2px dashed var(--accent);
  border-radius: 3px 3px 0 0; padding: 0 6px; margin: 0 2px; max-width: none; width: auto; }
.cl input.full { flex: 1 1 auto; min-width: 28ch; margin-right: 12px; }
.cl input.filled { border-bottom-style: solid; }
.cl input.bad { border-bottom-color: var(--bad); background: var(--bad-soft); }
.cl input::placeholder { color: var(--muted); font-style: italic; opacity: 0.9; }
.editor { display: grid; grid-template-columns: auto minmax(0, 1fr); border: 1px solid var(--line); border-radius: 6px; background: var(--code-bg); overflow: hidden; }
.gutter { font-family: var(--f-mono); font-size: 14px; line-height: 1.6; color: var(--muted); text-align: right; padding: 10px 8px 10px 12px;
  user-select: none; white-space: pre; overflow: hidden; border-right: 1px solid var(--line); }
.editor textarea { font-family: var(--f-mono); font-size: 14px; line-height: 1.6; padding: 10px 12px; border: 0; background: transparent;
  resize: vertical; min-height: 340px; width: 100%; max-width: none; white-space: pre; overflow: auto; tab-size: 4; border-radius: 0; }
.editor textarea:focus { outline: none; }
.editor:focus-within { outline: 3px solid var(--accent); outline-offset: 1px; }
.results { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; }
.results li { display: grid; grid-template-columns: 1.5rem minmax(0, 1fr); gap: 6px; padding: 8px 10px; border-radius: 6px; font-size: 0.92rem; }
.results li.ok { background: var(--ok-soft); }
.results li.ko { background: var(--bad-soft); }
.results .mark { font-weight: 700; }
.results li.ok .mark { color: var(--ok); }
.results li.ko .mark { color: var(--bad); }
.results .det { color: var(--muted); font-size: 0.85rem; }
pre.out { margin: 0; background: var(--code-bg); border: 1px solid var(--line); border-radius: 6px; padding: 10px 12px;
  font-family: var(--f-mono); font-size: 13px; overflow-x: auto; max-height: 300px; overflow-y: auto; white-space: pre; }
pre.out:empty { display: none; }
pre.out .err { color: var(--bad); }
.hints { display: grid; gap: 6px; }
.hints p { background: var(--accent-soft); border-radius: 6px; padding: 8px 12px; font-size: 0.92rem; }
.status { display: flex; align-items: center; gap: 8px; font-size: 0.88rem; }
.dot { width: 9px; height: 9px; border-radius: 50%; background: var(--warn); flex: none; }
.dot.ready { background: var(--ok); }
.dot.fail { background: var(--bad); }

/* ---------- Data viewer ---------- */
.viz { display: grid; grid-template-columns: 240px minmax(0, 1fr); gap: 16px; align-items: start; }
@media (max-width: 900px) { .viz { grid-template-columns: minmax(0, 1fr); } }
.dataset-list { display: grid; gap: 12px; }
.dataset-group { display: grid; gap: 6px; }
.dataset { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 2px 10px; align-items: center; text-align: left; width: 100%;
  border: 1px solid var(--line); background: var(--surface); color: var(--ink); border-radius: 6px; padding: 8px 10px; }
.dataset:hover { border-color: var(--accent); }
.dataset[aria-current="true"] { border-color: var(--accent); background: var(--accent-soft); }
.dataset .kind { grid-row: span 2; font-family: var(--f-mono); font-size: 0.7rem; font-weight: 600; text-transform: uppercase; color: var(--accent);
  border: 1px solid var(--accent); border-radius: 4px; padding: 1px 5px; }
.dataset .name { font-weight: 700; overflow-wrap: anywhere; }
.dataset .file { font-family: var(--f-mono); font-size: 0.75rem; color: var(--muted); overflow-wrap: anywhere; }
.viewer-view { display: grid; gap: 12px; min-width: 0; }
.vhead { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: baseline; gap: 6px 16px; }
.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--line); flex-wrap: wrap; }
.tab { border: 0; background: none; color: var(--muted); padding: 8px 12px; border-bottom: 3px solid transparent; margin-bottom: -1px; }
.tab[aria-selected="true"] { color: var(--accent); border-bottom-color: var(--accent); font-weight: 700; }
.toolbar { display: flex; flex-wrap: wrap; gap: 8px 16px; align-items: center; font-size: 0.9rem; }
.toolbar label { display: inline-flex; gap: 6px; align-items: center; font-weight: 400; }
.tbl-wrap { overflow: auto; max-height: 520px; border: 1px solid var(--line); border-radius: 6px; }
table.data { border-collapse: collapse; font-size: 0.85rem; font-variant-numeric: tabular-nums; width: max-content; min-width: 100%; }
.data th, .data td { padding: 5px 10px; border-bottom: 1px solid var(--line); white-space: nowrap; text-align: left; }
.data th { position: sticky; top: 0; background: var(--code-bg); font-weight: 700; z-index: 1; }
.data th button { border: 0; background: none; color: inherit; font-weight: 700; padding: 0; }
.data td.num { text-align: right; font-family: var(--f-mono); }
.data td.rn { color: var(--muted); font-family: var(--f-mono); font-size: 0.78rem; text-align: right; }
.data tbody tr { cursor: pointer; }
.data tbody tr:hover { background: var(--accent-soft); }
.data tbody tr.sel { background: var(--sel); }
.empty-value { color: var(--bad); font-weight: 700; }
.space { color: var(--warn); }
.pager { display: flex; gap: 8px; align-items: center; font-size: 0.85rem; }
.profile { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 10px; }
.column-card { border: 1px solid var(--line); border-radius: 6px; padding: 10px 12px; display: grid; gap: 6px; align-content: start; }
.column-card .column-name { font-family: var(--f-mono); font-weight: 600; overflow-wrap: anywhere; }
.chip { display: inline-block; font-size: 0.72rem; border-radius: 99px; padding: 1px 8px; background: var(--accent-soft); color: var(--accent); font-weight: 700; }
.chip.mixed { background: var(--warn-soft); color: var(--warn); }
.kv { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 1px 10px; font-size: 0.82rem; margin: 0; }
.kv dt { color: var(--muted); }
.kv dd { margin: 0; font-family: var(--f-mono); overflow-wrap: anywhere; }
.signal { font-size: 0.8rem; background: var(--warn-soft); color: var(--warn); border-radius: 4px; padding: 4px 8px; }
.hist rect { fill: var(--accent); }
.hist text { fill: var(--muted); font: 9px var(--f-mono); }
.map { height: 440px; border-radius: 6px; border: 1px solid var(--line); z-index: 0; }
.split { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); gap: 12px; }
@media (max-width: 1000px) { .split { grid-template-columns: minmax(0, 1fr); } }
.card { border: 1px solid var(--line); border-radius: 6px; padding: 10px 12px; font-size: 0.88rem; }
.card:empty { display: none; }
.mx-wrap { overflow: auto; max-height: 520px; border: 1px solid var(--line); border-radius: 6px; background: var(--code-bg); }
canvas.mx { display: block; image-rendering: pixelated; }
.ramp-legend { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; font-family: var(--f-mono); font-size: 0.78rem; }
.ramp { width: 200px; max-width: 40vw; height: 12px; border-radius: 3px; border: 1px solid var(--line); }
.swatch { width: 14px; height: 12px; background: var(--nodata); border: 1px solid var(--line); border-radius: 2px; }
.hover { font-family: var(--f-mono); font-size: 0.85rem; min-height: 1.4em; }
.stats { display: grid; grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); gap: 8px; }
.stat { border: 1px solid var(--line); border-radius: 6px; padding: 8px 10px; }
.stat b { display: block; font-family: var(--f-mono); font-size: 1.05rem; font-variant-numeric: tabular-nums; overflow-wrap: anywhere; }
.stat span { font-size: 0.78rem; color: var(--muted); }
.stat b .badge { font-family: var(--f-body); font-size: 0.8rem; }
.console { display: grid; gap: 10px; }
.console textarea { font-family: var(--f-mono); font-size: 14px; line-height: 1.6; padding: 10px 12px; border: 1px solid var(--line); border-radius: 6px;
  background: var(--code-bg); width: 100%; max-width: none; min-height: 200px; resize: vertical; white-space: pre; tab-size: 4; }
details.data-panel > summary { cursor: pointer; font-weight: 700; }
.leaflet-container { font-family: var(--f-body); }

/* ---------- Teacher dashboard ---------- */
.tbl { width: 100%; border-collapse: collapse; font-size: 0.9rem; font-variant-numeric: tabular-nums; }
.tbl th, .tbl td { text-align: left; padding: 7px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
.tbl th { color: var(--muted); font-weight: 400; font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.05em; }
.tbl td.num { text-align: right; }
.tbl-scroll { overflow-x: auto; }
.bar { height: 8px; background: var(--line); border-radius: 99px; overflow: hidden; min-width: 80px; }
.bar span { display: block; height: 100%; background: var(--ok); }
.kpis { display: grid; grid-template-columns: repeat(auto-fill, minmax(170px, 1fr)); gap: 10px; }
.split > .panel { align-content: start; }
.advice { margin: 0; padding-left: 20px; display: grid; gap: 8px; }
.advice.alerts li::marker { color: var(--warn); }
.advice-links { display: flex; flex-wrap: wrap; gap: 4px 14px; margin-top: 4px; font-size: 0.9rem; }
.bar.weak span { background: var(--warn); }
.skill { display: grid; grid-template-columns: minmax(0, 1fr) minmax(80px, 160px) 2.5rem; gap: 10px; align-items: center; font-size: 0.92rem; }
.skill b { text-align: right; font-variant-numeric: tabular-nums; }
.method { margin: 8px 0 0; padding-left: 20px; display: grid; gap: 4px; }
pre.student-code { margin: 4px 0 0; background: var(--code-bg); border: 1px solid var(--line); border-radius: 6px; padding: 8px 10px;
  font-family: var(--f-mono); font-size: 12px; overflow-x: auto; max-height: 220px; white-space: pre; }

@media (prefers-reduced-motion: reduce) { * { animation: none !important; transition: none !important; scroll-behavior: auto !important; } }

/* ---------- Tests ---------- */
.form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 0 20px; }
.form-grid .wide { grid-column: 1 / -1; }
.form-grid .wide input, .form-grid .wide textarea { max-width: none; }
.form-grid ul { list-style: none; margin: 4px 0 12px; padding: 0; display: grid; gap: 4px; }
.form-grid ul label, .checks label { font-weight: 400; display: flex; gap: 8px; align-items: baseline; }
.checks { display: grid; gap: 6px; }
.draw { border: 1px dashed var(--line); border-radius: var(--radius); padding: 12px 14px; background: var(--code-bg); display: grid; gap: 12px; }
.draw summary { cursor: pointer; }
.draw[open] { gap: 12px; }
.draw-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 8px 16px; margin: 10px 0; }
.draw-grid label, .draw .filters label { display: grid; grid-template-columns: minmax(0, 1fr) 4.5rem; gap: 8px; align-items: center; font-weight: 400; font-size: 0.9rem; }
.draw .filters label { grid-template-columns: auto auto; }
.draw input[type=number] { width: 4.5rem; }
.pick { border: 0; margin: 0; padding: 0; display: grid; gap: 6px; }
.pick legend { font-weight: 700; margin-bottom: 6px; padding: 0; }
.pick-row { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 10px; align-items: start; font-weight: 400;
  border: 1px solid var(--line); border-radius: 6px; padding: 8px 12px; background: var(--surface); cursor: pointer; }
.pick-row:has(input:checked) { border-color: var(--accent); background: var(--accent-soft); }
.pick-row input { margin-top: 4px; }
.pick-row > span { display: grid; gap: 2px; }
.pick-row .tags { display: flex; flex-wrap: wrap; gap: 4px; }
.legend-list { margin: 0; padding-left: 22px; columns: 2 260px; }

/* ---------- Dashboard: long tables ---------- */
.watch { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.watch li { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 0 12px; align-items: baseline;
  border-bottom: 1px solid var(--line); padding-bottom: 8px; }
.watch li > .small { grid-column: 1; }
.watch-figures { grid-column: 2; grid-row: 1 / span 2; align-self: center; text-align: right; }
.table-filter { max-width: 420px !important; }
.module-list { display: grid; gap: 8px; }
.module-group { border: 1px solid var(--line); border-radius: 6px; background: var(--surface); }
.module-group > summary { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 6px 16px;
  padding: 10px 14px; cursor: pointer; list-style-position: inside; }
.module-group[open] > summary { border-bottom: 1px solid var(--line); }
.module-group .tbl-scroll { padding: 4px 10px 10px; }
.module-name { font-weight: 700; }
.module-figures { display: flex; align-items: center; gap: 10px; }
.module-figures .bar { width: 120px; }
table.sortable th[data-sort] { padding: 0; }
table.sortable th .sort { all: unset; box-sizing: border-box; display: block; width: 100%; padding: 7px 10px; cursor: pointer;
  font: inherit; color: inherit; text-transform: inherit; letter-spacing: inherit; }
table.sortable th.num .sort { text-align: right; }
table.sortable th .sort:focus-visible { outline: 3px solid var(--accent); outline-offset: -3px; }
table.sortable th .sort::after { content: " ↕"; opacity: 0.35; }
table.sortable th[aria-sort="ascending"] .sort::after { content: " ↑"; opacity: 1; }
table.sortable th[aria-sort="descending"] .sort::after { content: " ↓"; opacity: 1; }
.sync-panel > summary { display: flex; flex-wrap: wrap; gap: 6px 16px; align-items: baseline; cursor: pointer; }
.sync-panel > summary h2 { display: inline; }
.skill-group { margin-top: 4px; display: flex; gap: 6px; align-items: baseline; }
.skill-group span { font-weight: 400; text-transform: none; letter-spacing: 0; }
.skill-group.weak { color: var(--warn); }
.not-yet > summary { cursor: pointer; list-style-position: inside; }
.not-yet > summary h3 { display: inline-flex; }
.not-yet ul { margin: 8px 0 0; padding-left: 20px; display: grid; gap: 4px; font-size: 0.92rem; }

/* ---------- Home title: brand | service, in the Python colours ---------- */
.brand-title { display: flex; flex-wrap: wrap; align-items: center; gap: 0.2em 0.45em; }
.brand-name { color: var(--py-blue-text); }
.brand-separator { width: 2px; height: 0.9em; border-radius: 1px; background: var(--line); }
.brand-service { color: var(--py-yellow); background: var(--py-blue); border-radius: 0.25em; padding: 0.02em 0.32em 0.06em; }
.wrap.auth .logout-actions { justify-content: center; }
.wrap.auth .logout-actions button[type=submit] { width: auto; }
.wrap.auth > p { text-align: center; }
/* Password rules under the field (sign up, change password): a discreet help, not body text. */
.wrap.auth form ul:not(.errorlist) { margin: 0; padding-left: 18px; font-size: 0.82rem; color: var(--muted); display: grid; gap: 2px; }

/* Long text pages (privacy policy): a centred card at a comfortable reading width. */
.wrap.doc { width: min(780px, calc(100% - 32px)); max-width: none; margin-inline: auto; padding-inline: 0; }
.wrap.doc > .panel { padding: 32px 40px; border-radius: 12px; box-shadow: 0 1px 2px rgb(0 0 0 / 4%), 0 8px 24px rgb(0 0 0 / 5%); }
.wrap.doc .md { max-width: none; gap: 10px; }
.wrap.doc .md h1 { margin-bottom: 2px; }
.wrap.doc .md h2 { margin-top: 14px; padding-top: 14px; border-top: 1px solid var(--line); }
@media (max-width: 520px) { .wrap.doc { margin-top: 4px; } .wrap.doc > .panel { padding: 22px 18px; } }
/* Pages made of several cards (My account): lighter cards, the irreversible one marked. */
.wrap.doc > section.panel { padding: 22px 28px; }
.wrap.doc > section.panel h2 { margin: 0; }
.wrap.doc > .danger-zone { border-color: var(--bad); box-shadow: inset 4px 0 0 var(--bad), 0 1px 2px rgb(0 0 0 / 4%); }
.wrap.doc > .danger-zone h2 { color: var(--bad); }
@media (max-width: 520px) { .wrap.doc > section.panel { padding: 18px 16px; } }