:root{
  /* Mode Clair — même palette que la Home, moins blanche (façon Facebook) */
  --crust:#eeece7;--base:#f5f3ee;--surface:#ffffff;--card:#ffffff;--card2:#f6f3ed;
  --ember:#a8460f;--ember2:#8a3a0c;--ember-glow:rgba(168,70,15,.15);
  --ember-dim:rgba(168,70,15,.08);--ember-border:rgba(168,70,15,.24);
  --sand:#2a2015;--sand2:#5c4a38;--fog:#6b5a44;--muted:#8a7358;
  --green:#2f9e63;--blue:#2f6fd6;--red:#c93f3f;--yellow:#b8860b;
  --border:rgba(168,70,15,.14);--border2:rgba(168,70,15,.24);
  --overlay-bg:rgba(238,236,231,.9);
  --font:'DM Sans',system-ui,sans-serif;
  --head:'Syne',system-ui,sans-serif;
  --mono:'JetBrains Mono',monospace;
  --r:2px;--r-sm:2px;--r-xs:2px;
  --ease:cubic-bezier(.4,0,.2,1);
  --shadow:0 8px 32px rgba(0,0,0,.1);
}
[data-theme="dark"]{
  /* Dark Marron — comportement historique, appliqué par défaut par le script anti-FOUC */
  --crust:#0c0a08;--base:#120d09;--surface:#1a130c;--card:#1f160d;--card2:#271c10;
  --ember:#e07b35;--ember2:#c4621e;--ember-glow:rgba(224,123,53,.35);
  --ember-dim:rgba(224,123,53,.16);--ember-border:rgba(224,123,53,.36);
  --sand:#ede0cc;--sand2:#c4b49e;--fog:#8a7358;--muted:#4a3a26;
  --green:#5ec98f;--blue:#4a9eff;--red:#e05252;--yellow:#f5c842;
  --border:rgba(224,123,53,.14);--border2:rgba(224,123,53,.24);
  --overlay-bg:rgba(12,10,8,.9);
  --shadow:0 8px 32px rgba(0,0,0,.45);
}
[data-theme="pure"]{
  /* Dark Pur — fonds neutres, sans teinte brune, accent ember conservé */
  --crust:#18181a;--base:#1d1d20;--surface:#1f1f22;--card:#26262a;--card2:#2c2c30;
  --ember:#e07b35;--ember2:#c4621e;--ember-glow:rgba(224,123,53,.3);
  --ember-dim:rgba(224,123,53,.14);--ember-border:rgba(224,123,53,.32);
  --sand:#ededee;--sand2:#c9c9cc;--fog:#a3a3a8;--muted:#8f8f94;
  --green:#5ec98f;--blue:#4a9eff;--red:#e05252;--yellow:#f5c842;
  --border:#38383d;--border2:#46464c;
  --overlay-bg:rgba(24,24,26,.9);
  --shadow:0 8px 32px rgba(0,0,0,.5);
}

/* Bordures neutres (moins de teinte orange qu'avant) */
:root{--line:rgba(42,32,21,.13);--line-soft:rgba(42,32,21,.08);--hover:rgba(42,32,21,.035);--on-ember:#fff;--r-c:6px;}
[data-theme="dark"]{--line:rgba(237,224,204,.13);--line-soft:rgba(237,224,204,.07);--hover:rgba(237,224,204,.04);--on-ember:#1a1008;}
[data-theme="pure"]{--line:#38383d;--line-soft:#2a2a2e;--hover:rgba(255,255,255,.04);--on-ember:#1a1008;}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{font-family:var(--font);background:var(--crust);color:var(--sand);min-height:100vh;font-size:15px;line-height:1.5;
  padding-bottom:calc(64px + env(safe-area-inset-bottom));}
a{color:inherit;text-decoration:none;}
button,select,input{font:inherit;color:inherit;}
button{cursor:pointer;}
:focus-visible{outline:2px solid var(--ember);outline-offset:2px;}
[hidden]{display:none!important;}

/* ── Barre du haut ── */
.topbar{position:sticky;top:0;z-index:50;display:flex;align-items:center;gap:12px;height:56px;padding:0 16px;
  background:var(--crust);border-bottom:1px solid var(--line);}
.topbar-back{width:36px;height:36px;display:flex;align-items:center;justify-content:center;border-radius:var(--r-c);color:var(--sand2);}
.topbar-back:hover{background:var(--hover);color:var(--sand);}
.topbar-title{font-family:var(--head);font-weight:700;font-size:1.02rem;color:var(--sand);}
.topbar-links{margin-left:auto;display:flex;gap:4px;}
.topbar-links a{padding:8px 12px;border-radius:var(--r-c);font-size:.88rem;font-weight:500;color:var(--sand2);}
.topbar-links a:hover{background:var(--hover);color:var(--sand);}

/* ── Page ── */
.page{max-width:900px;margin:0 auto;padding:28px 20px 40px;}
.intro h1{font-family:var(--head);font-weight:700;font-size:1.75rem;letter-spacing:-.01em;line-height:1.2;color:var(--sand);margin-bottom:8px;}
.intro-lead{color:var(--sand2);max-width:60ch;line-height:1.6;}
.progress{margin-top:14px;font-size:.92rem;color:var(--sand2);}
.progress strong{color:var(--sand);font-weight:600;}
.progress a{color:var(--ember);font-weight:500;margin-left:6px;}
.progress a:hover{text-decoration:underline;}
.how{margin-top:14px;font-size:.9rem;color:var(--sand2);}
.how summary{cursor:pointer;color:var(--ember);font-weight:500;list-style:none;display:inline-flex;align-items:center;gap:6px;}
.how summary::-webkit-details-marker{display:none;}
.how summary::before{content:'›';display:inline-block;transition:transform .15s;font-size:1.1rem;line-height:1;}
.how[open] summary::before{transform:rotate(90deg);}
.how ol{margin:10px 0 0 1.2rem;display:grid;gap:6px;max-width:62ch;line-height:1.55;}
.how li strong{color:var(--sand);font-weight:600;}

/* ── Filtres ── */
.filters{margin-top:26px;display:grid;gap:14px;}
.search{display:flex;align-items:center;gap:10px;height:44px;padding:0 14px;background:var(--card);border:1px solid var(--line);border-radius:var(--r-c);color:var(--muted);}
.search:focus-within{border-color:var(--ember);}
.search i{font-size:.85rem;}
.search input{flex:1;min-width:0;background:none;border:none;outline:none;color:var(--sand);}
.search input::placeholder{color:var(--fog);}

.diff-tabs{display:flex;gap:2px;border-bottom:1px solid var(--line);overflow-x:auto;scrollbar-width:none;}
.diff-tabs::-webkit-scrollbar{display:none;}
.diff-tab{flex:0 0 auto;display:inline-flex;align-items:center;gap:7px;padding:10px 14px;background:none;border:none;border-bottom:2px solid transparent;
  margin-bottom:-1px;color:var(--sand2);font-weight:500;font-size:.92rem;white-space:nowrap;}
.diff-tab:hover{color:var(--sand);}
.diff-tab.active{color:var(--sand);border-bottom-color:var(--ember);font-weight:600;}
.diff-tab .n{color:var(--fog);font-weight:400;font-size:.82rem;}
.diff-tab .n:empty{display:none;}
.dot{display:inline-block;width:8px;height:8px;border-radius:50%;flex:0 0 8px;background:var(--fog);}
.d-beginner{background:var(--green);}
.d-intermediate{background:var(--blue);}
.d-advanced{background:var(--yellow);}
.d-expert{background:var(--red);}

.selects{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;}
.selects select{width:100%;height:42px;padding:0 34px 0 12px;background:var(--card);border:1px solid var(--line);border-radius:var(--r-c);
  color:var(--sand);font-size:.9rem;appearance:none;-webkit-appearance:none;cursor:pointer;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%238a7358' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 12px center;}
.selects select:hover{border-color:var(--fog);}
.selects select:focus{border-color:var(--ember);outline:none;}

.filter-foot{display:flex;align-items:center;flex-wrap:wrap;gap:8px 18px;font-size:.88rem;color:var(--sand2);}
.filter-foot .count{margin-right:auto;}
.check{display:inline-flex;align-items:center;gap:8px;cursor:pointer;}
.check input{width:16px;height:16px;accent-color:var(--ember);}
.link-btn{background:none;border:none;color:var(--ember);font-weight:500;padding:4px 0;}
.link-btn:hover{text-decoration:underline;}

/* ── Liste ── */
.list{margin-top:14px;background:var(--card);border:1px solid var(--line);border-radius:8px;overflow:hidden;}
.row{display:grid;grid-template-columns:28px minmax(0,1fr) auto;gap:14px;padding:18px 20px;border-top:1px solid var(--line-soft);align-items:start;}
.row:first-child{border-top:none;}
a.row:hover{background:var(--hover);}
a.row:hover .row-title{color:var(--ember);}
.st{width:22px;height:22px;margin-top:2px;border-radius:50%;border:1.5px solid var(--fog);display:flex;align-items:center;justify-content:center;color:transparent;font-size:.62rem;}
.st.attempted{border-color:var(--yellow);background:linear-gradient(90deg,var(--yellow) 50%,transparent 50%);}
.st.solved{border-color:var(--green);background:var(--green);color:#fff;}
.row-main{min-width:0;}
.row-title{font-size:1.02rem;font-weight:600;color:var(--sand);line-height:1.35;display:flex;flex-wrap:wrap;align-items:baseline;gap:4px 10px;}
.row-badge{font-size:.78rem;font-weight:500;color:var(--sand2);border:1px solid var(--line);border-radius:4px;padding:1px 7px;}
.row-desc{margin-top:4px;font-size:.9rem;color:var(--sand2);line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.row-meta{margin-top:8px;display:flex;flex-wrap:wrap;align-items:center;gap:2px 14px;font-size:.82rem;color:var(--fog);}
.row-meta > span{display:inline-flex;align-items:center;gap:6px;}
.row-meta .diff{color:var(--sand2);font-weight:500;}
.row-tags{margin-top:8px;display:flex;flex-wrap:wrap;gap:6px;}
.row-tags span{font-size:.78rem;color:var(--sand2);background:var(--hover);border-radius:4px;padding:2px 8px;}
.row-side{text-align:right;white-space:nowrap;padding-top:1px;}
.row-xp{font-weight:600;color:var(--sand);font-size:.95rem;}
.row-score{margin-top:2px;font-size:.8rem;color:var(--green);}

/* chargement */
.row.skel{height:96px;background:linear-gradient(100deg,transparent 30%,var(--hover) 50%,transparent 70%);background-size:200% 100%;animation:sk 1.4s infinite linear;}
@keyframes sk{to{background-position:-200% 0;}}
@media (prefers-reduced-motion:reduce){.row.skel{animation:none;}}

/* état vide / erreur */
.state{padding:56px 24px;text-align:center;}
.state strong{display:block;font-size:1rem;color:var(--sand);margin-bottom:4px;}
.state p{color:var(--sand2);font-size:.9rem;margin-bottom:16px;}
.btn{display:inline-flex;align-items:center;justify-content:center;height:40px;padding:0 18px;border-radius:var(--r-c);border:1px solid var(--line);
  background:var(--card);color:var(--sand);font-weight:500;font-size:.9rem;}
.btn:hover{border-color:var(--ember);color:var(--ember);}
.btn:disabled{opacity:.45;cursor:default;}
.btn.primary{background:var(--ember);border-color:var(--ember);color:var(--on-ember);font-weight:600;}
.btn.primary:hover{filter:brightness(1.06);color:var(--on-ember);}

/* pagination */
.pager{display:flex;align-items:center;justify-content:center;gap:14px;margin-top:20px;font-size:.9rem;color:var(--sand2);}

/* navigation basse (mobile) */
.bottom-nav{position:fixed;left:0;right:0;bottom:0;z-index:60;display:none;grid-template-columns:repeat(4,1fr);background:var(--crust);
  border-top:1px solid var(--line);padding-bottom:env(safe-area-inset-bottom);}
.bottom-nav a{display:flex;flex-direction:column;align-items:center;gap:3px;padding:9px 0 8px;font-size:.7rem;color:var(--fog);}
.bottom-nav a i{font-size:1.05rem;}
.bottom-nav a.active{color:var(--ember);}

@media (max-width:820px){
  .selects{grid-template-columns:1fr 1fr;}
}
@media (max-width:640px){
  .topbar-links a:not(#topProfilBtn){display:none;}
  .bottom-nav{display:grid;}
  .page{padding:20px 14px 28px;}
  .intro h1{font-size:1.45rem;}
  .row{grid-template-columns:24px minmax(0,1fr) auto;gap:10px 12px;padding:16px 14px;}
  .row-xp{font-size:.88rem;}
  .filter-foot .count{flex:1 0 100%;}
}