:root{
  --crust:#0c0a08;--base:#111009;--surface:#161310;--card:#1c1814;--card2:#231e19;
  --ember:#e07b35;--ember2:#c96820;--ember-dim:rgba(224,123,53,.12);--ember-border:rgba(224,123,53,.25);
  --sand:#ede0cc;--sand2:#c4b49e;--fog:#7a6a58;--muted:#3d3028;
  --green:#3ecf6e;--blue:#4a9eff;--red:#e05252;--yellow:#f5c842;--purple:#9b6dff;
  --gold:#f5c842;--silver:#c0c0c0;--bronze:#cd7f32;
  --border:rgba(255,255,255,.06);--border2:rgba(255,255,255,.1);
  --font:'DM Sans',system-ui,sans-serif;
  --head:'Syne',system-ui,sans-serif;
  --mono:'JetBrains Mono',monospace;
  --r:14px;--r-sm:10px;--r-xs:8px;
  --ease:cubic-bezier(.4,0,.2,1);
  --shadow:0 8px 32px rgba(0,0,0,.5);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{font-family:var(--font);background:var(--crust);color:var(--sand);min-height:100vh;
  background-image:
    radial-gradient(ellipse 80% 40% at 50% 0%,rgba(224,123,53,.07),transparent),
    radial-gradient(ellipse 40% 60% at 0% 50%,rgba(224,123,53,.03),transparent);}

/* ── TOPBAR ── */
.topbar{position:sticky;top:0;z-index:100;height:56px;
  background:rgba(12,10,8,.9);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
  border-bottom:1px solid var(--border);display:flex;align-items:center;padding:0 16px;gap:0;}
.topbar-logo{font-family:var(--head);font-weight:800;font-size:1.1rem;color:var(--sand);
  text-decoration:none;display:flex;align-items:center;gap:4px;flex-shrink:0;}
.topbar-logo .dot{color:var(--ember);}
.topbar-sep{width:1px;height:22px;background:var(--border);margin:0 14px;}
.topbar-title{font-family:var(--head);font-size:.9rem;font-weight:700;color:var(--sand2);
  display:flex;align-items:center;gap:6px;}
.topbar-right{margin-left:auto;display:flex;align-items:center;gap:8px;}
.topbar-btn{display:flex;align-items:center;gap:6px;padding:7px 14px;border-radius:var(--r-sm);
  border:1px solid var(--border2);background:rgba(255,255,255,.04);color:var(--sand2);
  font-size:.8rem;font-family:var(--font);cursor:pointer;text-decoration:none;transition:all .2s;}
.topbar-btn:hover{border-color:var(--ember-border);color:var(--ember);}
.topbar-back{width:36px;height:36px;border-radius:var(--r-xs);border:1px solid var(--border);
  background:transparent;color:var(--fog);cursor:pointer;display:flex;align-items:center;
  justify-content:center;transition:all .2s;text-decoration:none;}
.topbar-back:hover{border-color:var(--ember-border);color:var(--ember);}

/* ── LAYOUT ── */
.layout{max-width:1100px;margin:0 auto;padding:28px 16px 80px;}

/* ── HERO PODIUM ── */
.hero{text-align:center;padding:40px 16px 32px;position:relative;overflow:hidden;}
.hero-label{font-size:.72rem;font-weight:700;text-transform:uppercase;letter-spacing:2px;
  color:var(--ember);margin-bottom:10px;}
.hero-title{font-family:var(--head);font-size:clamp(1.8rem,5vw,2.8rem);font-weight:800;
  color:var(--sand);line-height:1.1;margin-bottom:6px;}
.hero-title span{color:var(--ember);}
.hero-sub{font-size:.9rem;color:var(--fog);margin-bottom:32px;}

/* Podium top 3 */
.podium{display:flex;align-items:flex-end;justify-content:center;gap:12px;margin-bottom:12px;
  padding:0 16px;}
.podium-slot{display:flex;flex-direction:column;align-items:center;gap:8px;}
.podium-slot.p1{order:2;}
.podium-slot.p2{order:1;}
.podium-slot.p3{order:3;}
.podium-avatar-wrap{position:relative;}
.podium-avatar{border-radius:50%;object-fit:cover;background:var(--card2);flex-shrink:0;}
.p1 .podium-avatar{width:72px;height:72px;border:3px solid var(--gold);box-shadow:0 0 24px rgba(245,200,66,.3);}
.p2 .podium-avatar{width:58px;height:58px;border:3px solid var(--silver);box-shadow:0 0 16px rgba(192,192,192,.2);}
.p3 .podium-avatar{width:52px;height:52px;border:3px solid var(--bronze);box-shadow:0 0 12px rgba(205,127,50,.2);}
.podium-medal{position:absolute;bottom:-6px;right:-6px;font-size:1.1rem;line-height:1;filter:drop-shadow(0 2px 4px rgba(0,0,0,.6));}
.p1 .podium-medal{font-size:1.3rem;bottom:-8px;right:-8px;}
.podium-name{font-family:var(--head);font-weight:700;font-size:.82rem;color:var(--sand);
  text-align:center;max-width:90px;line-height:1.2;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.p1 .podium-name{font-size:.9rem;max-width:110px;}
.podium-score{font-family:var(--mono);font-size:.75rem;color:var(--ember);font-weight:600;}
.podium-bar{border-radius:8px 8px 0 0;width:80px;display:flex;align-items:center;
  justify-content:center;font-family:var(--head);font-weight:800;font-size:.9rem;}
.p1 .podium-bar{height:80px;background:linear-gradient(to top,rgba(245,200,66,.18),rgba(245,200,66,.06));
  border:1px solid rgba(245,200,66,.3);color:var(--gold);width:90px;}
.p2 .podium-bar{height:56px;background:linear-gradient(to top,rgba(192,192,192,.12),rgba(192,192,192,.04));
  border:1px solid rgba(192,192,192,.2);color:var(--silver);}
.p3 .podium-bar{height:44px;background:linear-gradient(to top,rgba(205,127,50,.12),rgba(205,127,50,.04));
  border:1px solid rgba(205,127,50,.2);color:var(--bronze);}

/* ── FILTERS ── */
.filters-row{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:20px;align-items:center;}
.filter-group{display:flex;gap:4px;flex-wrap:wrap;}
.filter-btn{padding:6px 14px;border-radius:20px;border:1px solid var(--border);
  background:var(--card);color:var(--fog);font-size:.78rem;font-family:var(--font);
  cursor:pointer;transition:all .18s;white-space:nowrap;}
.filter-btn.active{background:var(--ember-dim);border-color:var(--ember-border);color:var(--ember);font-weight:600;}
.filter-btn:hover:not(.active){border-color:var(--border2);color:var(--sand2);}
.filter-sep{width:1px;height:26px;background:var(--border);align-self:center;}
.filter-search{flex:1;min-width:160px;max-width:260px;position:relative;}
.filter-search input{width:100%;padding:8px 14px 8px 34px;border-radius:20px;
  border:1px solid var(--border);background:var(--card);color:var(--sand);
  font-size:.82rem;font-family:var(--font);outline:none;transition:border-color .18s;}
.filter-search input:focus{border-color:var(--ember-border);}
.filter-search input::placeholder{color:var(--fog);}
.filter-search i{position:absolute;left:11px;top:50%;transform:translateY(-50%);color:var(--fog);font-size:.8rem;}

/* ── TABS ── */
.tabs{display:flex;gap:2px;margin-bottom:20px;background:var(--card);padding:4px;
  border-radius:var(--r-sm);border:1px solid var(--border);width:fit-content;}
.tab-btn{padding:8px 18px;border-radius:8px;border:none;background:transparent;
  color:var(--fog);font-size:.82rem;font-family:var(--font);cursor:pointer;transition:all .18s;font-weight:500;}
.tab-btn.active{background:var(--ember-dim);color:var(--ember);font-weight:700;}
.tab-btn:hover:not(.active){color:var(--sand2);}

/* ── USER CARD (top slot) ── */
.my-rank-banner{background:linear-gradient(135deg,rgba(224,123,53,.12),rgba(224,123,53,.05));
  border:1px solid var(--ember-border);border-radius:var(--r);padding:14px 18px;
  display:flex;align-items:center;gap:14px;margin-bottom:20px;cursor:pointer;
  transition:background .2s;text-decoration:none;}
.my-rank-banner:hover{background:linear-gradient(135deg,rgba(224,123,53,.18),rgba(224,123,53,.08));}
.my-rank-badge{width:44px;height:44px;border-radius:50%;background:var(--ember-dim);
  border:2px solid var(--ember-border);display:flex;align-items:center;justify-content:center;
  font-family:var(--mono);font-size:.9rem;font-weight:700;color:var(--ember);flex-shrink:0;}
.my-rank-info{flex:1;min-width:0;}
.my-rank-label{font-size:.72rem;color:var(--fog);text-transform:uppercase;letter-spacing:1px;margin-bottom:2px;}
.my-rank-name{font-family:var(--head);font-weight:700;font-size:.95rem;color:var(--sand);}
.my-rank-meta{font-size:.78rem;color:var(--sand2);margin-top:2px;}
.my-rank-score{font-family:var(--mono);font-size:1.1rem;font-weight:700;color:var(--ember);flex-shrink:0;}

/* ── LEADERBOARD TABLE ── */
.lb-header{display:grid;grid-template-columns:48px 1fr 90px 70px 70px 80px;gap:0;
  padding:10px 14px;border-bottom:1px solid var(--border);
  font-size:.68rem;font-weight:700;text-transform:uppercase;letter-spacing:1px;color:var(--fog);}
.lb-header .col-right{text-align:right;}
.lb-row{display:grid;grid-template-columns:48px 1fr 90px 70px 70px 80px;gap:0;
  padding:12px 14px;border-bottom:1px solid var(--border);align-items:center;
  transition:background .15s;cursor:default;}
.lb-row:last-child{border-bottom:none;}
.lb-row:hover{background:rgba(255,255,255,.025);}
.lb-row.top1{background:linear-gradient(90deg,rgba(245,200,66,.06),transparent);}
.lb-row.top2{background:linear-gradient(90deg,rgba(192,192,192,.04),transparent);}
.lb-row.top3{background:linear-gradient(90deg,rgba(205,127,50,.04),transparent);}
.lb-row.is-me{background:rgba(224,123,53,.06);border-left:2px solid var(--ember);}
.lb-rank{font-family:var(--mono);font-size:.88rem;font-weight:700;color:var(--fog);
  display:flex;align-items:center;gap:0;}
.lb-rank .medal-icon{font-size:1.1rem;line-height:1;}
.lb-user{display:flex;align-items:center;gap:10px;min-width:0;}
.lb-avatar{width:34px;height:34px;border-radius:50%;object-fit:cover;
  background:var(--card2);flex-shrink:0;border:2px solid var(--border);}
.lb-avatar-placeholder{width:34px;height:34px;border-radius:50%;background:var(--card2);
  border:2px solid var(--border);display:flex;align-items:center;justify-content:center;
  font-family:var(--head);font-weight:700;font-size:.8rem;color:var(--fog);flex-shrink:0;}
.lb-user-info{min-width:0;}
.lb-display-name{font-weight:600;font-size:.88rem;color:var(--sand);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.lb-specialty{font-size:.72rem;color:var(--fog);margin-top:1px;}
.lb-score-cell{text-align:right;font-family:var(--mono);font-size:.9rem;
  font-weight:700;color:var(--ember);}
.lb-solved-cell{text-align:right;font-size:.85rem;color:var(--sand2);font-weight:600;}
.lb-avg-cell{text-align:right;}
.lb-avg-inner{display:inline-flex;align-items:center;gap:4px;font-size:.82rem;color:var(--green);}
.lb-time-cell{text-align:right;font-family:var(--mono);font-size:.76rem;color:var(--fog);}

/* Skills badge */
.lb-skills{display:flex;gap:4px;flex-wrap:wrap;margin-top:3px;}
.skill-tag{padding:1px 6px;border-radius:4px;background:rgba(74,158,255,.1);
  border:1px solid rgba(74,158,255,.2);color:var(--blue);font-size:.64rem;font-weight:600;}

/* ── MOBILE ── */
.lb-header{display:none;}
.lb-row{display:flex;flex-direction:row;gap:0;padding:12px 14px;}
.lb-row-inner{display:flex;width:100%;align-items:center;gap:10px;}
.lb-row-right{margin-left:auto;display:flex;flex-direction:column;align-items:flex-end;gap:2px;}
.lb-row-meta{display:flex;gap:10px;margin-top:4px;font-size:.74rem;color:var(--fog);}
.lb-row-meta span{display:flex;align-items:center;gap:3px;}

/* Desktop */
@media(min-width:700px){
  .lb-header{display:grid;}
  .lb-row{display:grid;flex-direction:unset;}
  .lb-row-inner{display:contents;}
  .lb-row-right{display:contents;}
  .lb-row-meta{display:none;}
}

/* ── CARD WRAPPER ── */
.lb-card{background:var(--card);border:1px solid var(--border);border-radius:var(--r);overflow:hidden;}

/* ── STAT CHIPS ── */
.stats-row{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:20px;}
.stat-chip{background:var(--card);border:1px solid var(--border);border-radius:10px;
  padding:12px 16px;display:flex;flex-direction:column;gap:2px;flex:1;min-width:100px;}
.stat-chip-val{font-family:var(--mono);font-size:1.2rem;font-weight:700;color:var(--ember);}
.stat-chip-label{font-size:.7rem;color:var(--fog);text-transform:uppercase;letter-spacing:.8px;}

/* ── EXPAND ROW (détails) ── */
.lb-expand{display:none;padding:10px 14px 14px;border-top:1px solid var(--border);
  background:rgba(0,0,0,.15);}
.lb-expand.open{display:block;}
.expand-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:8px;}
.expand-item{background:var(--card2);border-radius:8px;padding:8px 12px;}
.expand-item-label{font-size:.65rem;color:var(--fog);text-transform:uppercase;letter-spacing:.8px;margin-bottom:3px;}
.expand-item-val{font-size:.85rem;color:var(--sand2);font-weight:600;}

/* ── LOADING ── */
.lb-loading{display:flex;flex-direction:column;align-items:center;gap:12px;padding:48px 16px;
  color:var(--fog);font-size:.9rem;}
.spinner{width:28px;height:28px;border:3px solid var(--border);border-top-color:var(--ember);
  border-radius:50%;animation:spin .8s linear infinite;}
@keyframes spin{to{transform:rotate(360deg);}}

/* ── EMPTY ── */
.empty-state{padding:56px 16px;text-align:center;}
.empty-icon{font-size:2.5rem;margin-bottom:12px;opacity:.4;}
.empty-title{font-family:var(--head);font-size:1.1rem;color:var(--sand2);margin-bottom:6px;}
.empty-sub{font-size:.85rem;color:var(--fog);}

/* ── PAGINATION ── */
.pagination{display:flex;justify-content:center;gap:8px;margin-top:20px;}
.page-btn{padding:8px 16px;border-radius:8px;border:1px solid var(--border);
  background:var(--card);color:var(--sand2);font-size:.82rem;cursor:pointer;transition:all .18s;font-family:var(--font);}
.page-btn:hover:not(:disabled){border-color:var(--ember-border);color:var(--ember);}
.page-btn:disabled{opacity:.35;cursor:not-allowed;}
.page-info{padding:8px 12px;font-size:.82rem;color:var(--fog);display:flex;align-items:center;}

/* ── CHALLENGE TAB ── */
.challenge-select{width:100%;padding:10px 14px;border-radius:var(--r-sm);
  border:1px solid var(--border);background:var(--card);color:var(--sand);
  font-size:.85rem;font-family:var(--font);cursor:pointer;margin-bottom:16px;outline:none;}
.challenge-select:focus{border-color:var(--ember-border);}

/* ── TOP SKILL BADGE ── */
.top-skill-badge{display:inline-flex;align-items:center;gap:4px;
  padding:2px 8px;border-radius:5px;
  background:rgba(155,109,255,.1);border:1px solid rgba(155,109,255,.2);
  color:var(--purple);font-size:.65rem;font-weight:700;margin-top:2px;}

/* ── REVEAL ANIMATION ── */
.lb-row{opacity:0;transform:translateY(8px);animation:rowIn .3s var(--ease) forwards;}
@keyframes rowIn{to{opacity:1;transform:translateY(0);}}

/* Podium animation */
.podium-slot{animation:podIn .5s var(--ease) both;}
.p2{animation-delay:.05s;}
.p1{animation-delay:.1s;}
.p3{animation-delay:.15s;}
@keyframes podIn{from{opacity:0;transform:translateY(20px);}to{opacity:1;transform:translateY(0);}}