/* ---------- usage dashboard ---------- */
.usage-page { --u-accent: var(--accent); --u-accent-2: var(--accent-2, var(--accent)); }
.u-filters { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-bottom: 16px; }
.u-pill {
  position: relative; display: inline-flex; align-items: center; height: 36px; max-width: 100%;
  border: 1px solid var(--line); border-radius: 999px; background: var(--surface);
}
.u-pill select {
  appearance: none; -webkit-appearance: none; border: 0; background: transparent; color: var(--text);
  font: inherit; font-size: 13px; font-weight: 600; height: 34px; padding: 0 30px 0 14px; cursor: pointer;
  max-width: 100%; text-overflow: ellipsis;
}
.u-pill::after {
  content: ""; position: absolute; right: 14px; top: 50%; width: 6px; height: 6px; margin-top: -4px;
  border-right: 1.5px solid var(--text-3); border-bottom: 1.5px solid var(--text-3); transform: rotate(45deg); pointer-events: none;
}
.u-pill select:focus-visible { outline: 2px solid var(--u-accent); outline-offset: 2px; border-radius: 999px; }
.u-link {
  background: none; border: 0; color: var(--text-3); font: inherit; font-size: 13px; font-weight: 600;
  min-height: 44px; padding: 0 8px; cursor: pointer; text-decoration: underline; text-underline-offset: 3px;
}
.u-link:hover { color: var(--text); }
.u-export { margin-left: auto; border-radius: 999px; }
.u-export:disabled { opacity: .5; cursor: not-allowed; }

.u-stats { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; margin-bottom: 16px; }
.u-card {
  background: var(--surface); border: 1px solid var(--line-soft); border-radius: 16px;
  padding: 16px; min-width: 0; box-shadow: var(--shadow-1);
}
.u-card:first-child:nth-last-child(odd) { grid-column: 1 / -1; }
.u-k { font-size: 12.5px; color: var(--text-3); font-weight: 600; display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.u-est { font-size: 10.5px; padding: 1px 6px; border-radius: 999px; background: var(--accent-soft); color: var(--on-accent-soft); font-weight: 600; }
.u-v { font-size: clamp(24px, 6vw, 36px); font-weight: 300; letter-spacing: -0.02em; line-height: 1.15; margin-top: 8px; font-variant-numeric: tabular-nums; overflow-wrap: anywhere; color: var(--text); }
.u-sub { margin-top: 6px; font-size: 12px; color: var(--text-3); font-variant-numeric: tabular-nums; overflow-wrap: anywhere; }
.u-sub b { color: var(--text-2); font-weight: 600; }

.u-panel { background: var(--surface); border: 1px solid var(--line-soft); border-radius: 16px; padding: 16px; margin-bottom: 20px; min-width: 0; box-shadow: var(--shadow-1); }
.u-chart-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; flex-wrap: wrap; margin-bottom: 12px; }
.u-tip { font-size: 13px; color: var(--text-3); min-height: 20px; font-variant-numeric: tabular-nums; }
.u-tip b { color: var(--text); font-weight: 600; margin-right: 6px; }
.u-seg { display: inline-flex; background: var(--line-soft); border-radius: 999px; padding: 3px; }
.u-seg button { border: 0; background: none; color: var(--text-3); font: inherit; font-size: 12px; font-weight: 600; min-height: 30px; padding: 0 12px; border-radius: 999px; cursor: pointer; }
.u-seg button.on { background: var(--surface); color: var(--text); box-shadow: 0 1px 3px rgba(0,0,0,.2); }

.u-chart { display: grid; grid-template-columns: 40px minmax(0, 1fr); gap: 6px; height: 200px; }
.u-yaxis { display: flex; flex-direction: column; justify-content: space-between; align-items: flex-end; font-size: 10.5px; color: var(--text-3); font-variant-numeric: tabular-nums; padding-bottom: 28px; }
.u-yaxis span { white-space: nowrap; }
.u-plot-wrap { min-width: 0; display: flex; flex-direction: column; overflow-x: auto; overflow-y: hidden; -webkit-overflow-scrolling: touch; }
.u-plot { position: relative; flex: 1; display: grid; grid-template-columns: repeat(var(--n), minmax(12px, 1fr)); gap: 3px; min-width: max(100%, calc(var(--n) * 14px)); }
.u-grid { position: absolute; inset: 0; display: flex; flex-direction: column; justify-content: space-between; pointer-events: none; }
.u-grid i { display: block; border-top: 1px dashed var(--line-soft); height: 0; }
.ubar { position: relative; z-index: 1; border: 0; background: none; padding: 0; margin: 0; display: flex; align-items: flex-end; cursor: pointer; min-height: 44px; -webkit-tap-highlight-color: transparent; }
.ubar:focus-visible { outline: 2px solid var(--u-accent); outline-offset: 1px; border-radius: 4px; }
.ubar-fill {
  display: block; width: 100%; min-height: 4px; border-radius: 4px;
  background: var(--u-accent); opacity: .85; transition: opacity .15s, background .15s;
}
.ubar.on .ubar-fill, .ubar:hover .ubar-fill { opacity: 1; background: var(--accent-hover, var(--u-accent)); }
.ubar.on .ubar-fill { box-shadow: 0 0 0 2px var(--u-accent) inset; }
.u-xaxis { display: grid; grid-template-columns: repeat(var(--n), minmax(12px, 1fr)); gap: 3px; height: 22px; margin-top: 6px; font-size: 10.5px; color: var(--text-3); min-width: max(100%, calc(var(--n) * 14px)); }
.u-xaxis span { white-space: nowrap; overflow: visible; font-variant-numeric: tabular-nums; }
.u-chart-foot { margin-top: 10px; }

.u-h2 { font-size: 14px; font-weight: 700; color: var(--text-2); margin: 4px 0 10px; }
.u-models { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; margin-bottom: 20px; }
.u-model { background: var(--surface); border: 1px solid var(--line-soft); border-radius: 14px; padding: 14px; min-width: 0; box-shadow: var(--shadow-1); }
.u-model:only-child { grid-column: 1 / -1; }
.u-model-name { font-size: 13.5px; font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: var(--text); }
.u-model-stats { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; margin-top: 10px; }
.u-model-stats > div { min-width: 0; }
.u-model-stats .k { display: block; font-size: 11px; color: var(--text-3); font-weight: 600; }
.u-model-stats b { display: block; font-size: 14px; font-weight: 600; font-variant-numeric: tabular-nums; overflow-wrap: anywhere; }
.u-model-bar { height: 4px; border-radius: 4px; background: var(--line-soft); margin-top: 12px; overflow: hidden; }
.u-model-bar span { display: block; height: 100%; background: var(--u-accent); border-radius: 4px; }

@media (min-width: 900px) {
  .u-stats { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
  .u-card:first-child:nth-last-child(odd) { grid-column: auto; }
  .u-panel { padding: 20px 22px; }
  .u-chart { height: 260px; }
  .u-models { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .u-model:only-child { grid-column: auto; }
}
@media (max-width: 380px) {
  .u-model-stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .u-export { margin-left: 0; }
}

/* trial tooltip card (reversible) */
.u-tip-card { display:inline-flex; align-items:center; gap:10px; background: var(--surface); border:1px solid var(--line-soft); border-radius: 12px; padding:8px 12px; box-shadow: var(--shadow-2); font-size:13px; color:var(--text); font-variant-numeric: tabular-nums; }
.u-tip-card b { font-size:14px; }
.u-tip-card .dot { width:8px; height:8px; border-radius:50%; background: var(--u-accent); flex:none; }
#u-tip { display:inline-flex; }