:root {
  --bg: #0e1014;
  --panel: #171b22;
  --panel-2: #1f242d;
  --border: #2a313c;
  --text: #e6e9ef;
  --muted: #8b93a1;
  --accent: #4ca3ff;
  --gold: #f5c451;
  --green: #4caf50;
  --red: #e05a5a;
  --cell: 56px;
  --gap: 16px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.5 "Segoe UI", system-ui, -apple-system, sans-serif;
}

/* ---- top bar ---- */
.topbar {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  padding: 14px 22px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 20;
}
.topbar h1 {
  font-size: 18px;
  margin: 0;
  font-weight: 600;
  letter-spacing: 0.3px;
}
.class-bar { display: flex; gap: 6px; flex-wrap: wrap; flex: 1; }
.class-btn {
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 6px 12px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
  border-left: 3px solid var(--clr, var(--muted));
  transition: background .12s, transform .12s;
}
.class-btn:hover { background: #283040; }
.class-btn.active { background: #2f3a4d; box-shadow: 0 0 0 1px var(--clr); }

.controls { display: flex; align-items: center; gap: 10px; }
.points-summary {
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  color: var(--gold);
  min-width: 64px;
  text-align: right;
}
.btn {
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 6px 12px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
}
.btn:hover { background: #283040; }

/* ---- trees layout ---- */
.trees {
  display: flex;
  gap: 22px;
  padding: 24px;
  align-items: flex-start;
  overflow-x: auto;
}
.tree {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
  flex: 0 0 auto;
}
.tree-head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}
.tree-head img { width: 32px; height: 32px; border-radius: 5px; border: 1px solid var(--border); }
.tree-head .name { font-size: 16px; font-weight: 700; }
.tree-head .tree-points { margin-left: auto; color: var(--gold); font-weight: 700; font-variant-numeric: tabular-nums; }

/* grid + arrow overlay share one coordinate space */
.grid-wrap { position: relative; }
.grid {
  display: grid;
  grid-template-columns: repeat(var(--cols), var(--cell));
  grid-auto-rows: var(--cell);
  gap: var(--gap);
  position: relative;
  z-index: 2;            /* talents sit above the arrow layer */
}
.arrows { position: absolute; inset: 0; pointer-events: none; z-index: 1; }

.cell { position: relative; }
.talent {
  position: relative;
  width: var(--cell);
  height: var(--cell);
  border-radius: 7px;
  border: 2px solid #3a414d;
  background-size: cover;
  background-position: center;
  cursor: pointer;
  filter: grayscale(0.85) brightness(0.6);
  transition: filter .12s, border-color .12s, box-shadow .12s;
}
.talent.available { filter: grayscale(0) brightness(1); border-color: #5a6678; }
.talent.partial   { filter: grayscale(0) brightness(1); border-color: var(--green); }
.talent.maxed     { filter: grayscale(0) brightness(1); border-color: var(--gold); box-shadow: 0 0 8px rgba(245,196,81,.5); }
.talent:hover { box-shadow: 0 0 0 2px var(--accent); }

.rank-badge {
  position: absolute;
  right: -5px;
  bottom: -5px;
  min-width: 18px;
  height: 18px;
  padding: 0 3px;
  border-radius: 9px;
  background: #11151b;
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 11px;
  font-weight: 700;
  line-height: 16px;
  text-align: center;
  font-variant-numeric: tabular-nums;
}
.rank-badge.maxed { color: var(--gold); border-color: var(--gold); }

/* ---- tooltip ---- */
.tooltip {
  position: fixed;
  z-index: 100;
  max-width: 320px;
  background: #0b0e12;
  border: 1px solid #39414e;
  border-radius: 8px;
  padding: 10px 12px;
  pointer-events: none;
  box-shadow: 0 8px 24px rgba(0,0,0,.55);
}
.tooltip .tt-name { font-weight: 700; font-size: 14px; margin-bottom: 2px; }
.tooltip .tt-rank { color: var(--muted); font-size: 12px; margin-bottom: 6px; }
.tooltip .tt-desc { color: #d6e2c9; }
.tooltip .tt-next { color: var(--muted); margin-top: 6px; }
.tooltip .tt-next b { color: var(--accent); font-weight: 600; }
.tooltip .tt-req { color: var(--red); margin-top: 6px; font-size: 12px; }

/* ---- toast ---- */
.toast {
  position: fixed;
  bottom: 22px;
  left: 50%;
  transform: translateX(-50%);
  background: #11151b;
  border: 1px solid var(--border);
  padding: 10px 16px;
  border-radius: 8px;
  z-index: 200;
}

.loading, .error { padding: 40px; color: var(--muted); }
.error { color: var(--red); }

/* ---- mobile bottom sheet (touch devices) ---- */
.tooltip.sheet {
  pointer-events: auto;
  left: 0;
  right: 0;
  bottom: 0;
  top: auto;
  width: 100%;
  max-width: none;
  border-radius: 14px 14px 0 0;
  padding: 16px 18px calc(18px + env(safe-area-inset-bottom));
  max-height: 72vh;
  overflow-y: auto;
  box-shadow: 0 -8px 28px rgba(0,0,0,.6);
}
.tt-actions { display: flex; gap: 10px; margin-top: 14px; }
.tt-btn {
  flex: 1;
  padding: 13px;
  font-size: 15px;
  font-weight: 600;
  border-radius: 9px;
  border: 1px solid var(--border);
  background: var(--panel-2);
  color: var(--text);
  cursor: pointer;
}
.tt-btn.add { background: #2f5d34; border-color: #3c7a44; }
.tt-btn:disabled { opacity: .4; }

/* ---- responsive: stack trees, make the top bar usable on phones ---- */
@media (max-width: 860px) {
  .topbar { gap: 10px; padding: 10px 14px; }
  .topbar h1 { font-size: 16px; width: 100%; }
  .class-bar {
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    width: 100%;
    padding-bottom: 4px;
  }
  .class-btn { flex: 0 0 auto; }
  .controls { width: 100%; justify-content: space-between; }

  .trees {
    flex-direction: column;
    align-items: center;
    overflow-x: visible;
    gap: 18px;
    padding: 16px 8px 40vh;   /* bottom pad so the sheet never covers content */
  }
  .tree { width: 100%; max-width: 340px; }
}