/* Java Academy — thème Material 3 (esprit Angular Material / produits Google).
   Mise en page : barre d'application, navigation à indicateur « pilule », surfaces tonales,
   cartes arrondies, boutons pilule, chips, snackbar et pied de page. */
:root {
  /* couleurs Material 3 (palette de référence bleu Google) */
  --md-primary: #0b57d0;
  --md-on-primary: #ffffff;
  --md-primary-container: #d3e3fd;
  --md-on-primary-container: #041e49;
  --md-secondary-container: #c2e7ff;
  --md-on-secondary-container: #001d35;
  --md-surface: #f8fafd;
  --md-surface-lowest: #ffffff;
  --md-surface-low: #f0f4f9;
  --md-surface-container: #e9eef6;
  --md-surface-high: #dde3ea;
  --md-on-surface: #1f1f1f;
  --md-on-surface-variant: #444746;
  --md-outline: #747775;
  --md-outline-variant: #c4c7c5;
  --md-inverse-surface: #303030;
  --md-inverse-on-surface: #f2f2f2;
  --md-error: #b3261e;
  --md-error-container: #f9dedc;
  --md-success: #146c2e;
  --md-success-container: #c4eed0;
  --md-warn: #8a5100;
  --md-warn-container: #ffdeae;
  /* ancien / nouveau style */
  --old: #8c4a00;
  --old-container: #ffdcc1;
  --new: #006a60;
  --new-container: #9ef2e2;
  --code-bg: #1e1f20;
  --code-ink: #e3e3e3;
  --elev-1: 0 1px 2px rgba(0,0,0,.3), 0 1px 3px 1px rgba(0,0,0,.15);
  --elev-2: 0 1px 2px rgba(0,0,0,.3), 0 2px 6px 2px rgba(0,0,0,.15);
  --font: 'Roboto', 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-display: 'Roboto Flex', 'Roboto', 'Segoe UI', system-ui, sans-serif;
  --font-mono: 'Roboto Mono', 'SFMono-Regular', Consolas, monospace;
  --r-s: 8px;
  --r-m: 12px;
  --r-l: 16px;
  --r-xl: 28px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --md-primary: #a8c7fa; --md-on-primary: #062e6f; --md-primary-container: #0842a0; --md-on-primary-container: #d3e3fd;
    --md-secondary-container: #004a77; --md-on-secondary-container: #c2e7ff;
    --md-surface: #131314; --md-surface-lowest: #0e0e0e; --md-surface-low: #1b1b1b; --md-surface-container: #1e1f20; --md-surface-high: #282a2c;
    --md-on-surface: #e3e3e3; --md-on-surface-variant: #c4c7c5; --md-outline: #8e918f; --md-outline-variant: #444746;
    --md-inverse-surface: #e3e3e3; --md-inverse-on-surface: #303030;
    --md-error: #f2b8b5; --md-error-container: #8c1d18; --md-success: #6dd58c; --md-success-container: #0f5223;
    --md-warn: #ffb95c; --md-warn-container: #5c3800;
    --old: #ffb77c; --old-container: #5c2f00; --new: #6fd8c6; --new-container: #00504a;
    --code-bg: #0e0e0e; --code-ink: #e3e3e3; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --md-primary: #a8c7fa; --md-on-primary: #062e6f; --md-primary-container: #0842a0; --md-on-primary-container: #d3e3fd;
  --md-secondary-container: #004a77; --md-on-secondary-container: #c2e7ff;
  --md-surface: #131314; --md-surface-lowest: #0e0e0e; --md-surface-low: #1b1b1b; --md-surface-container: #1e1f20; --md-surface-high: #282a2c;
  --md-on-surface: #e3e3e3; --md-on-surface-variant: #c4c7c5; --md-outline: #8e918f; --md-outline-variant: #444746;
  --md-inverse-surface: #e3e3e3; --md-inverse-on-surface: #303030;
  --md-error: #f2b8b5; --md-error-container: #8c1d18; --md-success: #6dd58c; --md-success-container: #0f5223;
  --md-warn: #ffb95c; --md-warn-container: #5c3800;
  --old: #ffb77c; --old-container: #5c2f00; --new: #6fd8c6; --new-container: #00504a;
  --code-bg: #0e0e0e; --code-ink: #e3e3e3; color-scheme: dark;
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body { background: var(--md-surface); color: var(--md-on-surface); font: 400 15px/1.6 var(--font); -webkit-font-smoothing: antialiased;
  min-height: 100vh; display: flex; flex-direction: column; }
a { color: var(--md-primary); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
:focus-visible { outline: 2px solid var(--md-primary); outline-offset: 2px; }
code, pre, .mono { font-family: var(--font-mono); }
h1, h2, h3 { font-family: var(--font-display); line-height: 1.25; text-wrap: balance; font-weight: 400; }
h1 { font-size: 2.1rem; margin: 0 0 .5rem; }
h2 { font-size: 1.45rem; margin: 2.2rem 0 .8rem; }
h3 { font-size: 1.1rem; font-weight: 500; margin: 1.5rem 0 .5rem; }
button { font: inherit; }
.num, td, .tabular { font-variant-numeric: tabular-nums; }
.eyebrow { font: 500 .75rem/1.3 var(--font); letter-spacing: .06em; text-transform: uppercase; color: var(--md-primary); }
.ms { font-family: 'Material Symbols Outlined'; font-weight: normal; font-style: normal; font-size: 20px; line-height: 1; letter-spacing: normal;
  text-transform: none; display: inline-block; white-space: nowrap; direction: ltr; -webkit-font-smoothing: antialiased;
  font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24; vertical-align: middle; }
@media (prefers-reduced-motion: reduce) { * { animation: none !important; transition: none !important; } }

/* ---------- barre d'application */
.topbar { position: sticky; top: 0; z-index: 20; display: flex; align-items: center; gap: 16px; padding: 8px 20px; min-height: 64px;
  background: var(--md-surface); border-bottom: 1px solid var(--md-outline-variant); }
.brand { display: flex; align-items: center; gap: 10px; color: var(--md-on-surface); white-space: nowrap; font: 400 1.3rem var(--font-display); }
.brand:hover { text-decoration: none; }
.brand b { font-weight: 500; }
.logo { display: grid; place-items: center; width: 36px; height: 36px; border-radius: 10px; background: var(--md-primary); color: var(--md-on-primary); }
.logo .ms { font-size: 22px; }
.mainnav { display: flex; gap: 4px; flex: 1; overflow-x: auto; justify-content: center; }
.mainnav a { display: inline-flex; align-items: center; gap: 6px; padding: 0 14px; height: 40px; border-radius: 20px; color: var(--md-on-surface-variant);
  white-space: nowrap; font-weight: 500; font-size: .9rem; }
.mainnav a:hover { background: var(--md-surface-container); color: var(--md-on-surface); text-decoration: none; }
.mainnav a.active { background: var(--md-secondary-container); color: var(--md-on-secondary-container); }
.mainnav a.active .ms { font-variation-settings: 'FILL' 1, 'wght' 400, 'GRAD' 0, 'opsz' 24; }
.userbox { display: flex; align-items: center; gap: 8px; white-space: nowrap; font-size: .9rem; }
.avatar { display: grid; place-items: center; width: 32px; height: 32px; border-radius: 50%; background: var(--md-primary-container);
  color: var(--md-on-primary-container); font-weight: 500; }
.avatar:hover { text-decoration: none; filter: brightness(.95); }
.iconbtn { display: grid; place-items: center; border: 0; background: transparent; color: var(--md-on-surface-variant); border-radius: 50%; width: 40px; height: 40px; cursor: pointer; }
.iconbtn:hover { background: var(--md-surface-container); }
.iconbtn.menu { display: none; }
.app { width: 100%; max-width: 1200px; margin: 0 auto; padding: 32px 24px 72px; flex: 1; }
.app.wide { max-width: none; padding: 0; }
.loading { color: var(--md-on-surface-variant); padding: 40px 0; }

/* ---------- boutons, chips, cartes */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; height: 40px; padding: 0 24px; border-radius: 20px;
  border: 1px solid var(--md-outline); background: transparent; color: var(--md-primary); cursor: pointer; font-weight: 500; font-size: .9rem;
  letter-spacing: .01em; transition: background .15s, box-shadow .15s; white-space: nowrap; }
.btn:hover { background: color-mix(in srgb, var(--md-primary) 8%, transparent); text-decoration: none; }
.btn.primary { background: var(--md-primary); border-color: var(--md-primary); color: var(--md-on-primary); }
.btn.primary:hover { box-shadow: var(--elev-1); background: color-mix(in srgb, var(--md-primary) 92%, var(--md-on-primary)); }
.btn.tonal { background: var(--md-secondary-container); border-color: transparent; color: var(--md-on-secondary-container); }
.btn.small { height: 32px; padding: 0 16px; font-size: .85rem; }
.btn .ms { font-size: 18px; }
.btn:disabled { opacity: .5; cursor: not-allowed; box-shadow: none; }
.kbd { font: 500 .7rem var(--font-mono); opacity: .75; }
.card { background: var(--md-surface-lowest); border: 1px solid var(--md-outline-variant); border-radius: var(--r-m); padding: 20px 24px; }
.muted { color: var(--md-on-surface-variant); }
.small { font-size: .875rem; }
.grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.spacer { flex: 1; }
.pill { display: inline-flex; align-items: center; gap: 4px; height: 24px; padding: 0 10px; border-radius: var(--r-s); font: 500 .75rem var(--font);
  border: 1px solid var(--md-outline-variant); color: var(--md-on-surface-variant); background: transparent; white-space: nowrap; }
.pill.old { background: var(--old-container); color: var(--old); border-color: transparent; }
.pill.new { background: var(--new-container); color: var(--new); border-color: transparent; }
.pill.ok { background: var(--md-success-container); color: var(--md-success); border-color: transparent; }
.pill.ko { background: var(--md-error-container); color: var(--md-error); border-color: transparent; }
.pill.warn { background: var(--md-warn-container); color: var(--md-warn); border-color: transparent; }
.pill.accent { background: var(--md-primary-container); color: var(--md-on-primary-container); border-color: transparent; }
a.pill:hover { text-decoration: none; background: var(--md-surface-container); }
.bar { height: 4px; border-radius: 2px; background: var(--md-surface-high); overflow: hidden; }
.bar > span { display: block; height: 100%; background: var(--md-primary); border-radius: 2px; }
.bar.thick { height: 8px; border-radius: 4px; }
.bar.thick > span { border-radius: 4px; }
.toast { position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%) translateY(140px); background: var(--md-inverse-surface); color: var(--md-inverse-on-surface);
  padding: 14px 20px; border-radius: 4px; box-shadow: var(--elev-2); transition: transform .25s, visibility .25s; z-index: 50; max-width: 90vw; font-size: .9rem; visibility: hidden; }
.toast.show { transform: translateX(-50%) translateY(0); visibility: visible; }
table { border-collapse: collapse; width: 100%; }
th, td { text-align: left; padding: 12px 16px; border-bottom: 1px solid var(--md-outline-variant); vertical-align: top; }
th { font: 500 .8rem var(--font); color: var(--md-on-surface-variant); background: var(--md-surface-low); }
.tablewrap { overflow-x: auto; border: 1px solid var(--md-outline-variant); border-radius: var(--r-m); background: var(--md-surface-lowest); }
.tablewrap table tr:last-child td { border-bottom: 0; }
input, select, textarea { font: inherit; color: var(--md-on-surface); background: transparent; border: 1px solid var(--md-outline); border-radius: 4px;
  padding: 0 14px; height: 52px; width: 100%; }
select { height: 44px; padding: 0 12px; border-radius: var(--r-s); max-width: 100%; text-overflow: ellipsis; }
.filters { display: grid; grid-template-columns: auto minmax(0, 220px) auto minmax(0, 1fr) auto; gap: 10px 12px; align-items: center; margin: 18px 0; }
.filters label { margin: 0; }
.filters select { width: 100%; }
.question { min-width: 0; }
input:focus, select:focus { border-color: var(--md-primary); outline: none; box-shadow: inset 0 0 0 1px var(--md-primary); }
label { display: block; font-weight: 500; margin: 16px 0 6px; font-size: .88rem; color: var(--md-on-surface-variant); }
.form { max-width: 440px; margin: 48px auto; border-radius: var(--r-xl); padding: 36px 40px; }
.form h2 { margin-top: 0; font-size: 1.6rem; }
.error { color: var(--md-error); margin-top: 10px; }
.mark { font-family: var(--font-mono); font-weight: 700; }
.mark.ok { color: var(--md-success); }
.mark.ko { color: var(--md-error); }
.mark.skip { color: var(--md-on-surface-variant); }

/* ---------- accueil */
.hero { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr); gap: 40px; align-items: center; padding: 32px 36px;
  background: var(--md-surface-low); border-radius: var(--r-xl); margin-bottom: 32px; }
.hero h1 { font-size: clamp(2rem, 3.6vw, 2.9rem); line-height: 1.15; font-weight: 400; }
.hero h1 em { font-style: normal; color: var(--md-primary); font-weight: 500; }
.hero .lead { font-size: 1.06rem; color: var(--md-on-surface-variant); max-width: 56ch; }
.hero .actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 22px; }
.console { background: var(--code-bg); color: var(--code-ink); border-radius: var(--r-l); font: .8rem/1.65 var(--font-mono); overflow: hidden; min-width: 0; box-shadow: var(--elev-2); }
.console .chrome { display: flex; align-items: center; gap: 8px; padding: 10px 16px; background: rgba(255,255,255,.04); color: #9aa0a6; font-size: .74rem; }
.console .chrome b { color: var(--code-ink); font-weight: 500; }
.console .dots { display: flex; gap: 6px; margin-right: 6px; }
.console .dots i { width: 10px; height: 10px; border-radius: 50%; background: #5f6368; display: block; }
.console .lanes { display: grid; grid-template-columns: 1fr 1fr; }
.console .lane { padding: 14px 16px 16px; min-width: 0; }
.console .lane + .lane { border-left: 1px solid rgba(255,255,255,.08); }
.console .lane .tag { display: inline-block; font: 500 .7rem var(--font); letter-spacing: .04em; padding: 2px 10px; border-radius: 10px; }
.console .lane.ancien .tag { color: #ffb77c; background: rgba(255,183,124,.14); }
.console .lane.moderne .tag { color: #6fd8c6; background: rgba(111,216,198,.14); }
.console pre { margin: 10px 0 12px; white-space: pre-wrap; color: #c4c7c5; font-size: .76rem; }
.console .kw { color: #f28b82; }
.console .fn { color: #8ab4f8; }
.console .ok { color: #81c995; }
.console .metric { display: flex; justify-content: space-between; border-top: 1px solid rgba(255,255,255,.08); padding-top: 6px; margin-top: 2px; }
.console .metric span:last-child { color: #fff; font-weight: 500; }
.console .junit { height: 4px; background: #81c995; margin-top: 12px; border-radius: 2px; }
.exam-picker { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.exam-picker button { border: 1px solid var(--md-outline-variant); background: var(--md-surface-lowest); padding: 14px 18px; text-align: left; cursor: pointer;
  color: var(--md-on-surface); min-width: 0; border-radius: var(--r-m); transition: background .15s, box-shadow .15s; }
.exam-picker button:hover { box-shadow: var(--elev-1); }
.exam-picker button.on { background: var(--md-primary-container); border-color: transparent; color: var(--md-on-primary-container); }
.exam-picker .code { font: 500 1.05rem var(--font); display: block; }
.exam-picker .meta { font-size: .8rem; opacity: .8; }
.status-strip { display: flex; gap: 12px; flex-wrap: wrap; align-items: stretch; margin: 16px 0 6px; }
.status-strip .stat { background: var(--md-surface-lowest); border: 1px solid var(--md-outline-variant); border-radius: var(--r-m); padding: 12px 18px; min-width: 140px; }
.status-strip .stat .v { font: 400 1.7rem/1.1 var(--font-display); font-variant-numeric: tabular-nums; }
.status-strip .stat .k { font-size: .8rem; color: var(--md-on-surface-variant); }
.track { margin-top: 40px; }
.track-head { display: flex; align-items: baseline; gap: 14px; flex-wrap: wrap; margin-bottom: 14px; }
.track-head h2 { margin: 0; }
.track-head p { margin: 0; color: var(--md-on-surface-variant); font-size: .92rem; }
.syllabus { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); }
.syllabus a.chap { display: grid; grid-template-columns: 48px minmax(0, 1fr); gap: 4px 14px; align-items: start; padding: 18px 20px; height: 100%;
  border: 1px solid var(--md-outline-variant); border-radius: var(--r-m); background: var(--md-surface-lowest); color: var(--md-on-surface);
  transition: box-shadow .15s, border-color .15s; }
.syllabus a.chap:hover { box-shadow: var(--elev-1); border-color: transparent; text-decoration: none; }
.syllabus a.chap.off { opacity: .55; }
.syllabus .cid { display: grid; place-items: center; width: 44px; height: 44px; border-radius: 12px; background: var(--md-primary-container);
  color: var(--md-on-primary-container); font: 500 .9rem var(--font); }
.syllabus .ctitle { font: 500 1.02rem/1.35 var(--font); }
.syllabus .csub { font-size: .86rem; color: var(--md-on-surface-variant); margin-top: 2px; }
.syllabus .cmeta { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 10px; }
.syllabus .cprog { grid-column: 2; margin-top: 10px; }
.syllabus .cprog .small { display: flex; justify-content: space-between; color: var(--md-on-surface-variant); margin-bottom: 4px; font-size: .8rem; }

/* ---------- chapitre / leçon */
.crumbs { font-size: .85rem; color: var(--md-on-surface-variant); display: flex; gap: 8px; align-items: center; }
.chapter-head { margin-bottom: 8px; }
.chapter-head .meta { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; color: var(--md-on-surface-variant); font-size: .9rem; }
.tabs { display: flex; gap: 0; border-bottom: 1px solid var(--md-outline-variant); margin: 22px 0 28px; overflow-x: auto; }
.tabs a { padding: 14px 20px; color: var(--md-on-surface-variant); border-bottom: 3px solid transparent; font-weight: 500; white-space: nowrap; font-size: .92rem; }
.tabs a.on { color: var(--md-primary); border-color: var(--md-primary); }
.tabs a:hover { text-decoration: none; background: var(--md-surface-low); }
.lesson-layout { display: grid; grid-template-columns: 230px minmax(0, 1fr); gap: 44px; }
.toc { position: sticky; top: 84px; align-self: start; max-height: calc(100vh - 110px); overflow: auto; font-size: .87rem; }
.toc .eyebrow { margin: 0 0 8px 12px; }
.toc a { display: block; color: var(--md-on-surface-variant); padding: 7px 12px; border-radius: 18px; line-height: 1.35; }
.toc a:hover { color: var(--md-on-surface); background: var(--md-surface-container); text-decoration: none; }
.prose { max-width: 820px; min-width: 0; }
.prose p, .prose li { max-width: 72ch; }
.prose pre { background: var(--code-bg); color: var(--code-ink); border-radius: var(--r-m); padding: 16px 18px; overflow-x: auto; font-size: .84rem; line-height: 1.55; }
.prose :not(pre) > code { background: var(--md-surface-container); padding: 1px 6px; border-radius: 4px; font-size: .86em; }
.prose blockquote { margin: 18px 0; padding: 12px 18px; background: var(--md-primary-container); color: var(--md-on-primary-container); border-radius: var(--r-m); }
.prose blockquote p { margin: 4px 0; }
.prose blockquote code { background: rgba(255,255,255,.4); }
.prose table { margin: 14px 0; font-size: .92rem; display: block; overflow-x: auto; border: 1px solid var(--md-outline-variant); border-radius: var(--r-m); }
.prose img { max-width: 100%; }
.objectives { background: var(--md-surface-low); border-radius: var(--r-l); padding: 18px 22px; margin-bottom: 28px; }
.objectives ul { margin: 8px 0 0; padding-left: 20px; }
.compare { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 12px; margin: 16px 0; }
.compare > div { min-width: 0; display: flex; flex-direction: column; }
.compare .label { align-self: flex-start; font: 500 .75rem var(--font); padding: 2px 12px; border-radius: 10px; margin-bottom: 8px; }
.compare .old .label { color: var(--old); background: var(--old-container); }
.compare .new .label { color: var(--new); background: var(--new-container); }
.compare pre { margin: 0; flex: 1; }
.next-step { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-top: 40px; padding: 20px 24px; background: var(--md-surface-low); border-radius: var(--r-l); }

/* ---------- liste d'exercices */
.exlist { border: 1px solid var(--md-outline-variant); border-radius: var(--r-m); background: var(--md-surface-lowest); overflow: hidden; }
.ex-row { display: grid; grid-template-columns: 24px minmax(0, 1fr) auto; gap: 16px; align-items: center; padding: 14px 20px; border-bottom: 1px solid var(--md-outline-variant); color: var(--md-on-surface); }
.ex-row:last-child { border-bottom: 0; }
.ex-row:hover { background: var(--md-surface-low); text-decoration: none; }
.ex-row .title { font-weight: 500; }
.ex-row .kind { font: 500 .72rem var(--font); color: var(--md-on-primary-container); background: var(--md-primary-container); padding: 1px 8px; border-radius: 8px; margin-right: 8px; }
.status-dot { width: 20px; height: 20px; border-radius: 50%; border: 2px solid var(--md-outline); }
.status-dot.valid { background: var(--md-success); border-color: var(--md-success); }
.status-dot.tried { background: var(--md-warn); border-color: var(--md-warn); }
.diff { letter-spacing: 1px; color: var(--md-primary); }

/* ---------- atelier */
.workbench { display: grid; grid-template-columns: minmax(320px, 40%) minmax(0, 1fr); height: calc(100vh - 65px); }
.wb-left { overflow: auto; padding: 24px 28px 64px; border-right: 1px solid var(--md-outline-variant); background: var(--md-surface); min-width: 0; }
.wb-right { display: flex; flex-direction: column; min-width: 0; background: var(--md-surface-lowest); }
.wb-toolbar { display: flex; gap: 8px; align-items: center; padding: 10px 14px; border-bottom: 1px solid var(--md-outline-variant); flex-wrap: wrap; }
.variant-switch { display: inline-flex; border: 1px solid var(--md-outline); border-radius: 20px; overflow: hidden; height: 40px; }
.variant-switch button { border: 0; background: transparent; color: var(--md-on-surface); padding: 0 16px; cursor: pointer; font-weight: 500; font-size: .86rem; display: flex; gap: 8px; align-items: center; }
.variant-switch button + button { border-left: 1px solid var(--md-outline); }
.variant-switch button.on.ancien { background: var(--old-container); color: var(--old); }
.variant-switch button.on.moderne { background: var(--new-container); color: var(--new); }
.variant-switch button.on.libre { background: var(--md-secondary-container); color: var(--md-on-secondary-container); }
.variant-switch .pill { height: 20px; border-color: currentColor; color: inherit; opacity: .8; }
.filetabs { display: flex; overflow-x: auto; background: var(--md-surface-low); border-bottom: 1px solid var(--md-outline-variant); }
.filetabs button { border: 0; background: transparent; padding: 10px 16px; cursor: pointer; color: var(--md-on-surface-variant); font: .78rem var(--font-mono); white-space: nowrap;
  border-bottom: 2px solid transparent; }
.filetabs button.on { color: var(--md-primary); border-color: var(--md-primary); background: var(--md-surface-lowest); }
.filetabs .ro-tag { font: 500 .66rem var(--font); margin-left: 6px; opacity: .7; text-transform: uppercase; letter-spacing: .05em; }
.editor { flex: 1; min-height: 300px; }
.results { max-height: 48%; overflow: auto; border-top: 1px solid var(--md-outline-variant); background: var(--md-surface); padding: 16px 20px; }
.results:empty { display: none; }
.verdict-bar { display: none; }
.verdict { display: inline-flex; align-items: center; gap: 8px; font: 500 1.05rem var(--font); padding: 4px 14px; border-radius: 16px; }
.verdict.valid { color: var(--md-success); background: var(--md-success-container); }
.verdict.invalid, .verdict.compile_error, .verdict.timeout, .verdict.error { color: var(--md-error); background: var(--md-error-container); }
.checks { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 10px; margin: 14px 0; }
.check { background: var(--md-surface-lowest); border: 1px solid var(--md-outline-variant); border-radius: var(--r-m); padding: 10px 14px; min-width: 0; }
.check .k { font-size: .75rem; color: var(--md-on-surface-variant); font-weight: 500; }
.check .v { font: 500 1.15rem var(--font); font-variant-numeric: tabular-nums; }
.check .lim { font-size: .75rem; color: var(--md-on-surface-variant); }
.check.ok { background: var(--md-success-container); border-color: transparent; }
.check.ok .v { color: var(--md-success); }
.check.ko { background: var(--md-error-container); border-color: transparent; }
.check.ko .v { color: var(--md-error); }
.testlist { list-style: none; padding: 0; margin: 0; font-size: .9rem; }
.testlist li { padding: 7px 0; border-bottom: 1px solid var(--md-outline-variant); display: grid; grid-template-columns: 22px minmax(0, 1fr) auto; gap: 6px; }
.testlist .msg { grid-column: 2 / -1; font: .78rem var(--font-mono); color: var(--md-error); white-space: pre-wrap; }
pre.compile { background: var(--code-bg); color: #f2b8b5; padding: 12px 14px; border-radius: var(--r-m); font-size: .8rem; overflow-x: auto; white-space: pre-wrap; }
.running { display: flex; align-items: center; gap: 12px; color: var(--md-on-surface-variant); }
.spinner { width: 20px; height: 20px; border: 3px solid var(--md-surface-high); border-top-color: var(--md-primary); border-radius: 50%; animation: spin .8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.criteria { background: var(--md-surface-low); border-radius: var(--r-l); padding: 14px 18px; margin-bottom: 18px; font-size: .88rem; }
.criteria ul { list-style: none; margin: 8px 0 0; padding: 0; }
.criteria li { display: grid; grid-template-columns: 20px minmax(0, 1fr); gap: 4px; padding: 2px 0; }
.versus { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 10px; }
.versus .side { border-radius: var(--r-m); padding: 12px 14px; }
.versus .side.ancien { background: var(--old-container); }
.versus .side.moderne { background: var(--new-container); }
.versus .side strong { font-size: .88rem; font-weight: 500; }
.versus .side.ancien, .versus .side.ancien .muted { color: var(--old); }
.versus .side.moderne, .versus .side.moderne .muted { color: var(--new); }

/* ---------- projet */
.steps { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.steps > li { display: grid; grid-template-columns: 48px minmax(0, 1fr); gap: 16px; padding: 18px 20px; border: 1px solid var(--md-outline-variant); border-radius: var(--r-m); background: var(--md-surface-lowest); }
.steps .chip { display: grid; place-items: center; width: 44px; height: 44px; border-radius: 12px; background: var(--md-primary-container); color: var(--md-on-primary-container); font-weight: 500; }
.steps .done .chip { background: var(--md-success-container); color: var(--md-success); }
.steps .state { display: inline-block; width: 8px; height: 8px; border-radius: 50%; background: var(--md-outline-variant); margin-right: 6px; }
.steps .done .state { background: var(--md-success); }

/* ---------- quiz / examen */
.question { margin-bottom: 16px; background: var(--md-surface-lowest); border: 1px solid var(--md-outline-variant); border-radius: var(--r-l); padding: 20px 24px; }
.question .qtext { font-size: 1rem; }
.question pre { background: var(--code-bg); color: var(--code-ink); border-radius: var(--r-m); padding: 12px 16px; overflow-x: auto; font-size: .84rem; }
.option { display: flex; gap: 12px; align-items: flex-start; padding: 10px 14px; border: 1px solid var(--md-outline-variant); border-radius: var(--r-m); margin: 8px 0; cursor: pointer; }
.option:hover { background: var(--md-surface-low); }
.option input { width: 18px; height: 18px; margin-top: 3px; accent-color: var(--md-primary); flex: none; }
.option.right { border-color: transparent; background: var(--md-success-container); }
.option.wrong { border-color: transparent; background: var(--md-error-container); }
.explain { margin-top: 12px; padding: 12px 16px; background: var(--md-surface-low); border-radius: var(--r-m); font-size: .92rem; }
.timer { font: 400 2rem var(--font-display); font-variant-numeric: tabular-nums; }
.exam-layout { display: grid; grid-template-columns: minmax(0, 1fr) 240px; gap: 28px; }
.exam-nav { position: sticky; top: 84px; align-self: start; border-radius: var(--r-l); }
.qgrid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 6px; margin: 12px 0; }
.qgrid a { display: grid; place-items: center; height: 32px; border-radius: 8px; border: 1px solid var(--md-outline-variant); color: var(--md-on-surface-variant); font-size: .8rem; }
.qgrid a.answered { background: var(--md-primary); color: var(--md-on-primary); border-color: var(--md-primary); }

/* ---------- programme */
.cov { font: 500 .75rem var(--font); }
.cov.complet { color: var(--md-success); }
.cov.partiel { color: var(--md-warn); }
.cov.absent { color: var(--md-error); }

/* ---------- certificat (document, palette fixe) */
.certificate { max-width: 820px; margin: 0 auto; background: #ffffff; color: #1f1f1f; border-radius: var(--r-l); box-shadow: var(--elev-2);
  border-top: 8px solid #0b57d0; padding: 56px 60px; text-align: center; }
.certificate .seal { font: 500 .78rem var(--font); letter-spacing: .25em; color: #0b57d0; }
.certificate h1 { font-size: 2.3rem; margin-top: 10px; }
.certificate .name { font: 400 2rem var(--font-display); margin: 18px 0; border-bottom: 1px solid #c4c7c5; display: inline-block; padding: 0 30px 6px; }
.certificate .fine { font-size: .78rem; color: #444746; margin-top: 30px; }

/* ---------- pied de page */
.footer { background: var(--md-surface-container); color: var(--md-on-surface-variant); margin-top: auto; }
.footer-inner { max-width: 1200px; margin: 0 auto; padding: 40px 24px 28px; display: grid; grid-template-columns: 1.4fr repeat(3, 1fr); gap: 32px; }
.footer .brand { font-size: 1.15rem; }
.footer p { font-size: .88rem; max-width: 40ch; }
.footer h4 { margin: 4px 0 12px; font: 500 .85rem var(--font); color: var(--md-on-surface); }
.footer ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; font-size: .88rem; }
.footer a { color: var(--md-on-surface-variant); }
.footer a:hover { color: var(--md-primary); }
.footer-bottom { border-top: 1px solid var(--md-outline-variant); }
.footer-bottom .footer-inner { display: flex; flex-wrap: wrap; gap: 8px 24px; padding-top: 16px; padding-bottom: 20px; font-size: .8rem; }
body.workbench-mode .footer { display: none; }

@media print {
  .topbar, .footer, .noprint { display: none !important; }
  body { background: #fff; }
}

/* ---------- responsive */
@media (max-width: 1180px) {
  .mainnav { justify-content: flex-start; }
  .mainnav a .ms { display: none; }
}
@media (max-width: 960px) {
  .topbar { padding: 8px 12px; flex-wrap: wrap; }
  .iconbtn.menu { display: grid; }
  .mainnav { display: none; order: 10; flex-basis: 100%; flex-direction: column; padding-bottom: 8px; }
  .mainnav.open { display: flex; }
  .mainnav a { height: 48px; padding: 0 16px; border-radius: 24px; }
  .mainnav a .ms { display: inline-block; }
  .userbox .who { display: none; }
  .app { padding: 20px 16px 56px; }
  .hero { grid-template-columns: minmax(0, 1fr); padding: 24px 20px; border-radius: var(--r-l); }
  .lesson-layout, .exam-layout { grid-template-columns: minmax(0, 1fr); }
  .toc, .exam-nav { position: static; max-height: none; }
  .workbench { grid-template-columns: minmax(0, 1fr); height: auto; }
  .wb-left { border-right: 0; border-bottom: 1px solid var(--md-outline-variant); padding: 18px 16px; }
  .editor { height: 62vh; }
  .results { max-height: none; }
  .checks { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-inner { grid-template-columns: 1fr 1fr; padding-left: 16px; padding-right: 16px; }
  .footer-inner > :first-child { grid-column: 1 / -1; }
  .certificate { padding: 30px 20px; }
  .form { padding: 28px 20px; margin: 24px auto; }
}
@media (max-width: 620px) {
  .filters { grid-template-columns: minmax(0, 1fr); }
  .compare, .versus, .console .lanes { grid-template-columns: minmax(0, 1fr); }
  .console .lane + .lane { border-left: 0; border-top: 1px solid rgba(255,255,255,.08); }
  .console .chrome .ctx { display: none; }
  .exam-picker { grid-template-columns: minmax(0, 1fr); }
  .syllabus { grid-template-columns: minmax(0, 1fr); }
  .ex-row { grid-template-columns: 24px minmax(0, 1fr); }
  .ex-row > .row { grid-column: 2; }
  .userbox .btn:not(.primary) { display: none; }
}
/* l'énoncé commence souvent par un titre # : il ne doit pas concurrencer le titre de l'exercice */
.wb-left .prose h1 { font-size: 1.2rem; margin-top: 1.2rem; }

/* ---------- page d'accueil générique */
.landing-hero { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr); gap: 48px; align-items: center;
  padding: 48px 44px; border-radius: var(--r-xl); margin-bottom: 20px;
  background: radial-gradient(120% 140% at 0% 0%, var(--md-primary-container) 0%, var(--md-surface-low) 55%, var(--md-surface-low) 100%); }
.landing-hero h1 { font-size: clamp(2.2rem, 4.4vw, 3.5rem); line-height: 1.08; font-weight: 400; margin: 10px 0 14px; }
.landing-hero h1 em { font-style: normal; font-weight: 500; color: var(--md-primary); }
.landing-hero .lead { font-size: 1.1rem; color: var(--md-on-surface-variant); max-width: 52ch; }
.landing-hero .actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 24px; }
.hero-badges { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 20px; }
.hero-badges .pill { background: var(--md-surface-lowest); }
.hero-badges .pill .ms { font-size: 16px; }
.formation-hero { margin-top: 14px; }
.formation-hero .card { border-radius: var(--r-l); }
.stats-band { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; margin: 0 0 12px; }
.stats-band > div { background: var(--md-surface-lowest); border: 1px solid var(--md-outline-variant); border-radius: var(--r-l); padding: 18px 22px; display: grid; }
.stats-band .v { font: 400 2.3rem/1.1 var(--font-display); color: var(--md-primary); font-variant-numeric: tabular-nums; }
.stats-band .k { font-size: .88rem; color: var(--md-on-surface-variant); }
.block { margin-top: 56px; }
.block-head { margin-bottom: 18px; }
.block-head h2 { margin: 0 0 4px; font-size: 1.75rem; }
.block-head p { margin: 0; color: var(--md-on-surface-variant); }
.features { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.feature { display: grid; gap: 6px; align-content: start; padding: 22px; border-radius: var(--r-l); background: var(--md-surface-lowest);
  border: 1px solid var(--md-outline-variant); color: var(--md-on-surface); transition: box-shadow .15s, border-color .15s; }
.feature:hover { box-shadow: var(--elev-1); border-color: transparent; text-decoration: none; }
.feature strong { font: 500 1.05rem var(--font); margin-top: 6px; }
.feature > span:last-child { color: var(--md-on-surface-variant); font-size: .92rem; }
.ficon { display: grid; place-items: center; width: 48px; height: 48px; border-radius: 14px; background: var(--md-secondary-container); color: var(--md-on-secondary-container); }
.ficon .ms { font-size: 26px; }
.pipeline { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0; counter-reset: p;
  border: 1px solid var(--md-outline-variant); border-radius: var(--r-l); overflow: hidden; background: var(--md-surface-lowest); }
.pipeline li { display: grid; gap: 4px; padding: 22px; position: relative; }
.pipeline li + li { border-left: 1px solid var(--md-outline-variant); }
.pipeline li .ms { font-size: 28px; color: var(--md-primary); }
.pipeline li strong { font-weight: 500; }
.pipeline li > span:last-child { color: var(--md-on-surface-variant); font-size: .88rem; }
.pipeline li::before { counter-increment: p; content: "0" counter(p); position: absolute; top: 18px; right: 20px; font: 500 .8rem var(--font-mono); color: var(--md-outline); }
.exam-cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.exam-card { display: grid; gap: 6px; padding: 24px; border-radius: var(--r-l); background: var(--md-surface-lowest); border: 1px solid var(--md-outline-variant);
  color: var(--md-on-surface); transition: box-shadow .15s; }
.exam-card:hover { box-shadow: var(--elev-2); text-decoration: none; }
.exam-card .badge { justify-self: start; background: var(--md-primary); color: var(--md-on-primary); border-radius: 8px; padding: 2px 10px; font-size: .78rem; font-weight: 500; }
.exam-card strong { font: 400 1.7rem var(--font-display); }
.exam-card .meta { font-size: .85rem; color: var(--md-on-surface-variant); }
.exam-card .go { display: inline-flex; align-items: center; gap: 4px; color: var(--md-primary); font-weight: 500; font-size: .9rem; margin-top: 6px; }
.exam-card .go .ms { font-size: 18px; }
.paths { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 12px; }
.path { display: grid; grid-template-columns: 48px minmax(0, 1fr); gap: 14px; align-items: start; padding: 18px 20px; border-radius: var(--r-l);
  border: 1px solid var(--md-outline-variant); background: var(--md-surface-lowest); color: var(--md-on-surface); }
.path:hover { box-shadow: var(--elev-1); text-decoration: none; }
.path > div { display: grid; gap: 2px; min-width: 0; }
.path strong { font-weight: 500; }
.pnum { display: grid; place-items: center; width: 44px; height: 44px; border-radius: 50%; background: var(--md-primary-container); color: var(--md-on-primary-container); font: 500 1rem var(--font); }
.cta-band { display: flex; align-items: center; gap: 20px; flex-wrap: wrap; justify-content: space-between; margin-top: 56px; padding: 32px 36px;
  border-radius: var(--r-xl); background: var(--md-primary); color: var(--md-on-primary); }
.cta-band h2 { margin: 0 0 4px; }
.cta-band p { margin: 0; opacity: .9; }
.cta-band .btn.primary { background: var(--md-on-primary); color: var(--md-primary); border-color: var(--md-on-primary); }
@media (max-width: 960px) {
  .landing-hero { grid-template-columns: minmax(0, 1fr); padding: 28px 20px; gap: 28px; border-radius: var(--r-l); }
  .stats-band { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .features, .exam-cards { grid-template-columns: minmax(0, 1fr); }
  .pipeline { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .pipeline li:nth-child(3) { border-left: 0; }
  .pipeline li:nth-child(n+3) { border-top: 1px solid var(--md-outline-variant); }
  .cta-band { padding: 24px 20px; }
}
@media (max-width: 620px) {
  .pipeline { grid-template-columns: minmax(0, 1fr); }
  .pipeline li + li { border-left: 0; border-top: 1px solid var(--md-outline-variant); }
  .paths { grid-template-columns: minmax(0, 1fr); }
}
/* les identifiants longs en code inline (ex. Files.newBufferedReader(...)) ne doivent pas élargir la page */
.prose { overflow-wrap: break-word; }
.prose :not(pre) > code { overflow-wrap: anywhere; }