/* unit-circle-explorer.css — Unit Circle Explorer (uc-) */

/* Compact sidebar — tighter vertical rhythm than framework default (gap 14px, toggle 44px) */
#app .sm-sidebar {
  gap: 2px;
  padding: 10px 12px 48px;
}
#app .sm-sidebar .sm-sidebar-heading {
  font-size: 11px;
  font-weight: 800;
  color: var(--sm-text);
  letter-spacing: 0.07em;
  margin-top: 8px;
  padding-bottom: 3px;
  border-bottom: 1px solid var(--sm-border);
}
#app .sm-sidebar .sm-sidebar-heading:first-child {
  margin-top: 0;
}
#app .sm-sidebar .sm-control {
  gap: 2px;
}
#app .sm-sidebar .sm-toggle-wrap {
  min-height: 30px;
  padding: 1px 0;
}
#app .sm-sidebar .sm-slider-track {
  padding: 12px 0;
}

.uc-sidebar-details {
  margin: 0;
  margin-top: 8px;
}
.uc-sidebar-details-summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}
.uc-sidebar-details-summary::-webkit-details-marker { display: none; }
.uc-sidebar-details-summary::marker { content: ''; }
.uc-sidebar-details-summary::after {
  content: '\25BE';
  font-size: 12px;
  color: var(--sm-text-muted);
  line-height: 1;
  transition: transform var(--sm-transition, .2s ease);
}
.uc-sidebar-details[open] .uc-sidebar-details-summary::after {
  transform: rotate(180deg);
}
.uc-sidebar-details-summary:focus-visible {
  outline: 2px solid var(--sm-indigo);
  outline-offset: 2px;
}
.uc-sidebar-details-body {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.uc-graph-extras--hidden { display: none; }

#uc-ctl-units .sm-btn-group,
#uc-ctl-focus .sm-btn-group,
#uc-ctl-panel-pos .sm-btn-group,
#uc-ctl-graph-all .sm-btn-group {
  flex-wrap: nowrap;
  width: 100%;
  align-self: stretch;
}
#uc-ctl-units .sm-btn-group-item,
#uc-ctl-focus .sm-btn-group-item,
#uc-ctl-panel-pos .sm-btn-group-item,
#uc-ctl-graph-all .sm-btn-group-item {
  flex: 1;
  justify-content: center;
  padding: 3px 7px;
  min-height: 32px;
  font-size: 11px;
}

.uc-main {
  display: flex; flex-direction: column; height: 100%; min-height: 0;
  background: var(--sm-canvas-bg);
}

.uc-canvas-wrap {
  flex: 1; min-height: 200px; position: relative; overflow: hidden;
}
.uc-angle-label {
  position: absolute; left: 0; top: 0;
  transform: translate(-50%, -50%);
  pointer-events: none; z-index: 5;
  font-size: 16px; line-height: 1; color: var(--sm-text);
  filter: drop-shadow(0 0 3px var(--sm-canvas-bg)) drop-shadow(0 0 3px var(--sm-canvas-bg));
}
.uc-angle-label .katex { color: var(--sm-text); }
.uc-angle-label.uc-angle-label--hidden { display: none; }
.uc-graph-axis-labels {
  position: absolute; left: 0; top: 0; width: 100%; height: 100%;
  pointer-events: none; z-index: 5; overflow: visible;
}
.uc-katex-axis-label {
  position: absolute; left: 0; top: 0;
  transform: translate(-50%, 0);
  line-height: 1; color: var(--sm-text-muted);
  filter: drop-shadow(0 0 3px var(--sm-canvas-bg)) drop-shadow(0 0 3px var(--sm-canvas-bg));
}
.uc-katex-axis-label .katex { color: var(--sm-text-muted); }
.uc-canvas {
  display: block; width: 100%; height: 100%;
  touch-action: none; cursor: default;
}

/* --- bottom readout panel (mirrors qe-panel) --- */
.uc-panel {
  flex-shrink: 0; max-height: 34vh; overflow-y: auto;
  padding: 6px 12px 10px; border-top: 1px solid var(--sm-border);
  background: var(--sm-surface);
}
.uc-panel.uc-panel--collapsed {
  max-height: none; overflow: visible;
  padding: 5px 12px;
  /* Above floating toolbar (900) and help trigger (200); below app header (1000). */
  position: relative;
  z-index: 950;
}
.uc-panel.uc-panel--collapsed .uc-panel-body { display: none !important; }

.uc-panel-head {
  display: flex; align-items: center; gap: 6px; width: 100%;
  box-sizing: border-box; margin: 0 0 6px;
}
.uc-panel.uc-panel--collapsed .uc-panel-head { margin-bottom: 0; padding-right: 40px; }

.uc-panel.uc-panel--top {
  border-top: none;
  border-bottom: 1px solid var(--sm-border);
}
/* Clear fixed .sm-help-btn (right: 12px, ~6.75rem wide) so collapse stays tappable */
.uc-panel.uc-panel--top .uc-panel-head {
  padding-right: calc(12px + 6.75rem + 8px);
}
.uc-panel-title { flex: 1; font-size: 13px; font-weight: 600; color: var(--sm-text-muted); line-height: 1.2; }

.uc-panel-collapse {
  flex-shrink: 0; width: 32px; height: 32px; padding: 0; margin: 0;
  display: flex; align-items: center; justify-content: center;
  border: 1.5px solid var(--sm-border); border-radius: 6px;
  background: var(--sm-surface); color: var(--sm-text-muted); cursor: pointer;
  transition: background .15s ease, border-color .15s ease, color .15s ease;
}
.uc-panel-collapse:hover { background: var(--sm-surface-raised); border-color: var(--sm-indigo); color: var(--sm-text); }
.uc-panel-collapse:focus-visible { outline: 2px solid var(--sm-indigo); outline-offset: 2px; }
.uc-panel-collapse-icon {
  display: block; width: 16px; height: 16px;
  transform-origin: 50% 50%;
  transition: transform var(--sm-transition, .2s ease);
}
.uc-panel-collapse-icon path { fill: none; stroke: currentColor; stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; }

.uc-panel-body { min-height: 0; }

.uc-readout-headline {
  display: flex; align-items: center; flex-wrap: wrap; gap: 8px;
  font-size: 18px; font-weight: 600; color: var(--sm-text);
  padding: 10px 12px; border: 1px solid var(--sm-border); border-radius: 8px;
  background: var(--sm-bg); box-sizing: border-box;
}
.uc-readout-headline .katex { color: var(--sm-text); }
.uc-readout-headline.uc-readout-headline--compare { line-height: 1.45; }
.uc-readout-value .katex { color: var(--sm-indigo); }
.uc-readout-value { font-variant-numeric: tabular-nums; color: var(--sm-indigo); }
.uc-readout-raw {
  margin-top: 8px; font-size: 15px; font-weight: 500; color: var(--sm-text-muted);
  font-variant-numeric: tabular-nums; line-height: 1.5;
}
.uc-readout-raw .katex { color: var(--sm-text-muted); font-size: 1em; }

/* --- zoom bar (mirrors qe-zoom-bar, no rotate) --- */
.uc-zoom-bar { position: absolute; bottom: 12px; left: 12px; display: flex; flex-direction: column; gap: 4px; z-index: 10; }
.uc-zoom-btn {
  width: 36px; height: 36px; border-radius: 8px; border: 1.5px solid var(--sm-border);
  background: var(--sm-surface); color: var(--sm-text); font-size: 18px; font-weight: 700; line-height: 1;
  cursor: pointer; display: flex; align-items: center; justify-content: center; padding: 0;
  transition: background .15s ease, border-color .15s ease; box-shadow: 0 1px 3px rgba(0,0,0,.08);
}
.uc-zoom-btn:hover { background: var(--sm-surface-raised); border-color: var(--sm-indigo); }
.uc-zoom-btn:active { background: var(--sm-indigo-light); }
.uc-zoom-btn:focus-visible { outline: 2px solid var(--sm-indigo); outline-offset: 2px; }

.uc-play-btn {
  position: absolute; bottom: 12px; right: 12px;
  width: 44px; height: 44px; border-radius: 50%;
  border: 1.5px solid var(--sm-border); background: var(--sm-surface);
  color: var(--sm-indigo); cursor: pointer;
  display: flex; align-items: center; justify-content: center; padding: 0;
  box-shadow: 0 1px 3px rgba(0,0,0,.12);
  transition: background .15s ease, border-color .15s ease;
  z-index: 10;
}
.uc-play-btn:hover { background: var(--sm-surface-raised); border-color: var(--sm-indigo); }
.uc-play-btn:active { background: var(--sm-indigo-light); }
.uc-play-btn:focus-visible { outline: 2px solid var(--sm-indigo); outline-offset: 2px; }
.uc-play-btn .sm-icon { width: 22px; height: 22px; }
.uc-play-btn.uc-play-btn--hidden { display: none; }

@media (max-width: 640px) {
  .uc-panel { max-height: 40vh; }
  .uc-readout-headline { font-size: 16px; }
}

@media (min-width: 1024px) {
  .uc-readout-raw { font-size: 16px; }
}

.uc-readout-expr .katex { color: var(--sm-text); }

.uc-readout-exact {
  margin-top: 8px; padding: 6px 8px;
  min-height: 58px; height: auto;
  box-sizing: border-box;
  display: flex; align-items: center;
  border: 1px solid var(--sm-border); border-radius: 8px;
  background: var(--sm-highlight-bg);
  font-size: 16px; color: var(--sm-text);
  overflow: visible;
}
.uc-readout-exact .katex { color: var(--sm-text); }
.uc-readout-exact.uc-readout-exact--compare { flex-wrap: wrap; row-gap: 4px; }
.uc-readout-exact.uc-readout-exact--hidden {
  visibility: hidden;
  border-color: transparent;
  background: transparent;
}

/* --- challenge card --- */
.uc-challenge {
  margin: 0 0 10px; padding: 10px 12px;
  border: 1px solid var(--sm-border); border-radius: 8px;
  background: var(--sm-bg); box-sizing: border-box;
}
.uc-challenge.uc-challenge--hidden { display: none; }
.uc-challenge.uc-challenge--solved { border-color: var(--sm-correct); background: var(--sm-correct-bg, var(--sm-bg)); }

.uc-challenge-row {
  display: flex; align-items: center; gap: 8px; margin-bottom: 8px; flex-wrap: wrap;
}
.uc-challenge-pick-label {
  flex: 1; min-width: 0;
  font-size: 12px; font-weight: 700; color: var(--sm-text-muted);
}
.uc-challenge-select {
  width: 3.5rem; flex-shrink: 0; font: inherit; font-size: 13px; text-align: center;
  padding: 6px 4px; border: 1.5px solid var(--sm-border); border-radius: 6px;
  background: var(--sm-surface); color: var(--sm-text);
}
.uc-challenge-select:focus-visible { outline: 2px solid var(--sm-indigo); outline-offset: 2px; }

.uc-challenge-prompt { margin: 0; font-size: 16px; font-weight: 600; color: var(--sm-text); line-height: 1.4; }
.uc-challenge-feedback {
  margin: 8px 0 0;
  font-size: 14px;
  font-weight: 500;
  line-height: 1.45;
  color: var(--sm-text);
}
.uc-challenge-feedback.uc-challenge-feedback--hidden { display: none; }

.uc-challenge-actions { display: flex; gap: 8px; margin-top: 10px; }
.uc-challenge-btn {
  font: inherit; font-size: 13px; font-weight: 600;
  padding: 7px 14px; border-radius: 8px; cursor: pointer;
  border: 1.5px solid var(--sm-border); background: var(--sm-surface); color: var(--sm-text);
  transition: background .15s ease, border-color .15s ease;
}
.uc-challenge-btn:hover { background: var(--sm-surface-raised); border-color: var(--sm-indigo); }
.uc-challenge-btn:focus-visible { outline: 2px solid var(--sm-indigo); outline-offset: 2px; }
.uc-challenge-btn--primary { background: var(--sm-indigo); border-color: var(--sm-indigo); color: #fff; }
.uc-challenge-btn--primary:hover { background: var(--sm-indigo); filter: brightness(1.05); }
.uc-challenge-btn.uc-challenge-hidden { display: none; }
.uc-challenge-btn--compact {
  flex-shrink: 0;
  padding: 6px 12px;
  margin-left: auto;
}

.uc-canvas-wrap.uc-canvas-wrap--solved { box-shadow: inset 0 0 0 3px var(--sm-correct); }

.uc-capturing .uc-zoom-bar, .uc-capturing .uc-play-btn { display: none !important; }