/* Layout : rail de navigation à gauche (bandeau en haut sur mobile), plan de travail pannable/zoomable à droite où chaque maladie se déploie en arbre horizontal. */
:root{
  --bg:#eef3f1; --surface:#fbfdfc; --ink:#14201c; --muted:#5b6b66; --line:#c9d5d1; --grid:#dde6e3;
  --c-root:#14201c;
  --c-clinique:#b8432c; --c-epidemio:#a8701a; --c-examens:#2a66a6; --c-pec:#287a4f; --c-liens:#6a4fb0;
  --f-display:"Bricolage Grotesque", "Avenir Next", "Segoe UI", system-ui, sans-serif;
  --f-body:"Atkinson Hyperlegible", "Segoe UI", system-ui, sans-serif;
  --shadow:0 1px 2px rgba(20,32,28,.08), 0 4px 14px rgba(20,32,28,.06);
}
@media (prefers-color-scheme: dark){ :root:not([data-theme="light"]){
  --bg:#0f1715; --surface:#17211e; --ink:#e4ece9; --muted:#93a39e; --line:#2c3a36; --grid:#1a2522;
  --c-root:#e4ece9;
  --c-clinique:#ef8a72; --c-epidemio:#e0b35c; --c-examens:#7fb2ea; --c-pec:#6fcb98; --c-liens:#b49cf0;
  --shadow:0 1px 2px rgba(0,0,0,.4), 0 4px 14px rgba(0,0,0,.3); color-scheme:dark }}
:root[data-theme="dark"]{
  --bg:#0f1715; --surface:#17211e; --ink:#e4ece9; --muted:#93a39e; --line:#2c3a36; --grid:#1a2522;
  --c-root:#e4ece9;
  --c-clinique:#ef8a72; --c-epidemio:#e0b35c; --c-examens:#7fb2ea; --c-pec:#6fcb98; --c-liens:#b49cf0;
  --shadow:0 1px 2px rgba(0,0,0,.4), 0 4px 14px rgba(0,0,0,.3); color-scheme:dark }

html,body{height:100%}
body{background:var(--bg);color:var(--ink);font-family:var(--f-body);font-size:15px;line-height:1.4;overflow:hidden}
.app{height:100%;display:grid;grid-template-columns:270px 1fr}
@media (max-width:760px){.app{grid-template-columns:1fr;grid-template-rows:auto 1fr}}

/* Rail */
.rail{background:var(--surface);border-right:1px solid var(--line);display:flex;flex-direction:column;gap:18px;
  padding-block:20px;padding-left:max(16px, env(safe-area-inset-left, 0px));padding-right:16px;overflow:auto;min-width:0}
.brand{font-family:var(--f-display);font-weight:700;font-size:22px;letter-spacing:-.01em;line-height:1.1}
.brand small{display:block;font-family:var(--f-body);font-weight:400;font-size:12.5px;color:var(--muted);letter-spacing:0;margin-top:4px}
.label{font-size:11px;text-transform:uppercase;letter-spacing:.09em;color:var(--muted);font-weight:700}
.search{position:relative;display:flex;flex-direction:column;gap:6px}
.search input{font:inherit;width:100%;padding:9px 11px;border-radius:8px;border:1px solid var(--line);background:var(--bg);color:var(--ink)}
.search input:focus-visible{outline:2px solid var(--c-examens);outline-offset:1px}
.results{display:flex;flex-direction:column;gap:2px;max-height:260px;overflow:auto}
.results button{all:unset;cursor:pointer;padding:7px 9px;border-radius:7px;font-size:13px;line-height:1.3}
.results button:hover,.results button:focus-visible{background:var(--bg)}
.results .where{display:block;font-size:11px;color:var(--muted);text-transform:uppercase;letter-spacing:.06em}
.results mark{background:color-mix(in srgb,var(--c-epidemio) 30%,transparent);color:inherit;border-radius:2px}
.controls{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:8px}
.controls select,.controls button{font:inherit;font-size:13px;color:var(--ink);background:var(--bg);border:1px solid var(--line);border-radius:7px;padding:6px 8px;min-width:0}
.controls #spe{flex:1 1 100%}
.controls #sortKey{flex:1 1 auto}
.controls button{cursor:pointer;font-weight:700;white-space:nowrap}
.controls select:focus-visible,.controls button:focus-visible{outline:2px solid var(--c-examens);outline-offset:1px}
.empty{font-size:13px;color:var(--muted);padding:6px 10px}
.list{display:flex;flex-direction:column;gap:2px}
.list button{all:unset;cursor:pointer;display:flex;align-items:baseline;gap:10px;padding:8px 10px;border-radius:8px;font-size:15px}
.list button:hover{background:var(--bg)}
.list button:focus-visible{outline:2px solid var(--c-examens)}
.list button[aria-current="true"]{background:var(--ink);color:var(--surface)}
.list .num{font-variant-numeric:tabular-nums;font-size:12px;opacity:.65;min-width:28px}
.legend{display:grid;gap:6px;font-size:13px}
.legend span{display:flex;align-items:center;gap:8px}
.legend i{width:10px;height:10px;border-radius:50%;background:var(--c)}
.foot{margin-top:auto;font-size:12px;color:var(--muted);line-height:1.45}
@media (max-width:760px){
  .rail{border-right:0;border-bottom:1px solid var(--line);padding-block:12px;padding-right:max(16px, env(safe-area-inset-right, 0px));gap:10px;overflow:visible}
  .brand small,.legend,.foot,.rail .label{display:none}
  .list{flex-direction:row;overflow-x:auto;gap:4px;padding-bottom:2px}
  .controls{flex-wrap:nowrap;margin-bottom:6px}
  .controls #spe{flex:1 1 auto}
  .list button{white-space:nowrap;padding:6px 10px;font-size:14px}
  .results{position:absolute;top:100%;left:0;right:0;z-index:5;background:var(--surface);border:1px solid var(--line);border-radius:8px;box-shadow:var(--shadow)}
  .results:empty{display:none}
}

/* Plan de travail */
.stage{position:relative;overflow:hidden;min-width:0;touch-action:none;cursor:grab;
  background-image:radial-gradient(var(--grid) 1.2px, transparent 1.2px);background-size:22px 22px}
.stage.dragging{cursor:grabbing}
.world{position:absolute;left:0;top:0;transform-origin:0 0}
.world svg{position:absolute;left:0;top:0;overflow:visible;pointer-events:none}
.world path{fill:none;stroke-width:2;stroke-linecap:round}

.node{position:absolute;left:0;top:0;width:max-content;will-change:transform,opacity;user-select:none}
.n-root{font-family:var(--f-display);background:var(--c-root);color:var(--bg);padding:16px 22px;border-radius:14px;box-shadow:var(--shadow);max-width:280px}
.n-root .t{font-size:30px;font-weight:700;letter-spacing:-.02em;line-height:1}
.n-root .s{font-family:var(--f-body);font-size:13px;opacity:.8;margin-top:6px}
.n-root .meta{display:flex;gap:10px;align-items:center;margin-top:10px;font-family:var(--f-body);font-size:12px}
.n-root .meta b{font-variant-numeric:tabular-nums;background:color-mix(in srgb,var(--bg) 18%,transparent);padding:2px 7px;border-radius:5px}
.n-root a{color:inherit}

.n-sec{font-family:var(--f-display);font-weight:700;font-size:17px;color:#fff;background:var(--c);padding:9px 14px 9px 12px;border-radius:999px;cursor:pointer;display:flex;align-items:center;gap:8px;white-space:nowrap;box-shadow:var(--shadow)}
:root[data-theme="dark"] .n-sec{color:#0f1715}
@media (prefers-color-scheme: dark){ :root:not([data-theme="light"]) .n-sec{color:#0f1715} }
.n-sec .ord{font-family:var(--f-body);font-size:11px;font-weight:700;opacity:.8;font-variant-numeric:tabular-nums}
.n-sec .count{font-family:var(--f-body);font-weight:700;font-size:11.5px;border-radius:999px;padding:1px 7px;background:rgba(255,255,255,.25)}
.n-sec .chev{transition:transform .25s;font-size:12px}
.n-sec.collapsed .chev{transform:rotate(-90deg)}

.n-item{max-width:330px;background:color-mix(in srgb,var(--c) 9%,var(--surface));border:1px solid color-mix(in srgb,var(--c) 28%,var(--line));
  border-radius:9px;padding:7px 11px;font-size:14px;line-height:1.38;color:var(--ink)}
.n-item b{color:color-mix(in srgb,var(--c) 75%,var(--ink));font-weight:700}
.n-item.has-kids{cursor:pointer;font-weight:700}
.n-item.has-kids::after{content:" ›";color:var(--c)}
.n-item.has-kids.collapsed::after{content:" +"}
.n-sub{max-width:300px;background:var(--surface);border:1px solid var(--line);border-radius:7px;padding:5px 10px;font-size:13.5px;line-height:1.35}
.n-sub b{color:color-mix(in srgb,var(--c) 75%,var(--ink))}
.n-link{max-width:300px;border-radius:999px;padding:6px 13px;font-size:13.5px;border:1.5px solid var(--c);color:var(--ink);background:var(--surface);display:flex;gap:8px;align-items:center}
.n-link.live{cursor:pointer;font-weight:700}
.n-link.live:hover{background:color-mix(in srgb,var(--c) 14%,var(--surface))}
.n-link .arrow{color:var(--c);font-weight:700}
.n-link.off{border-style:dashed;color:var(--muted)}
.n-link .tag{font-size:10.5px;text-transform:uppercase;letter-spacing:.07em;opacity:.8}
.node.flash{animation:flash 1.6s ease-out}
@keyframes flash{0%,40%{box-shadow:0 0 0 4px var(--c),var(--shadow)}100%{box-shadow:0 0 0 0 transparent}}

/* Mode révision */
.quiz .n-item:not(.has-kids):not(.shown) ,.quiz .n-sub:not(.shown){cursor:pointer}
.quiz .n-item:not(.has-kids):not(.shown) > .txt,.quiz .n-sub:not(.shown) > .txt{filter:blur(6px);opacity:.55}

/* Barre d'outils */
.tools{position:absolute;right:max(14px, env(safe-area-inset-right, 0px));bottom:max(14px, env(safe-area-inset-bottom, 0px));display:flex;gap:6px;flex-wrap:wrap;justify-content:flex-end;max-width:calc(100% - 28px)}
.tools button{font:inherit;font-size:13px;font-weight:700;background:var(--surface);color:var(--ink);border:1px solid var(--line);border-radius:9px;padding:8px 12px;cursor:pointer;box-shadow:var(--shadow)}
.tools button:hover{border-color:var(--muted)}
.tools button:focus-visible{outline:2px solid var(--c-examens)}
.tools button[aria-pressed="true"]{background:var(--ink);color:var(--surface);border-color:var(--ink)}
.tools .sq{width:36px;padding:8px 0}
.hint{position:absolute;left:max(14px, env(safe-area-inset-left, 0px));bottom:max(14px, env(safe-area-inset-bottom, 0px));font-size:12px;color:var(--muted);background:color-mix(in srgb,var(--bg) 85%,transparent);padding:4px 8px;border-radius:6px}
@media (max-width:760px){.hint{display:none}.tools{flex-wrap:nowrap}.tools button{padding:7px 10px;font-size:12.5px}.tools .sq{width:32px}}
@media (prefers-reduced-motion: reduce){.n-sec .chev{transition:none}.node.flash{animation:none}}