/* ===================== Benchmark Dashboard ===================== */
:root {
  --radius: 12px;
  --shadow: 0 8px 30px rgba(0,0,0,.45);
  /* --on-accent: text/icon color that sits on top of an accent fill */
  --on-accent: #0b0e14;
}

/* ---- Dark theme (default) ---- */
:root,
:root[data-theme="dark"] {
  --bg: #0b0e14;
  --bg-1: #11151f;
  --bg-2: #161b27;
  --bg-3: #1d2331;
  --line: #262d3d;
  --line-2: #313a4e;
  --txt: #e6e9f0;
  --txt-dim: #9aa4b8;
  --txt-faint: #6b7588;
  --accent: #7c8cff;
  --accent-2: #4cc9b0;
  --teacher: #7c8cff;
  --student: #f0a868;
  --good: #4cc9b0;
  --mid: #e9c46a;
  --bad: #ef6f6f;
  --on-accent: #0b0e14;
  --shadow: 0 8px 30px rgba(0,0,0,.45);
}

/* ---- Light theme ---- */
:root[data-theme="light"] {
  --bg: #f5f7fb;
  --bg-1: #ffffff;
  --bg-2: #eef1f7;
  --bg-3: #e4e9f2;
  --line: #dde2ec;
  --line-2: #c8d0de;
  --txt: #1a2030;
  --txt-dim: #4a5468;
  --txt-faint: #828ca0;
  --accent: #5563e6;
  --accent-2: #1ba98c;
  --teacher: #5563e6;
  --student: #d97a32;
  --good: #1ba98c;
  --mid: #c79220;
  --bad: #dc5454;
  --on-accent: #ffffff;
  --shadow: 0 8px 30px rgba(30,40,70,.14);
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  background: var(--bg);
  color: var(--txt);
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 14px;
  -webkit-font-smoothing: antialiased;
}
#app { display: flex; flex-direction: column; min-height: 100vh; }
button, input, select { font-family: inherit; color: inherit; }
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb { background: var(--line-2); border-radius: 6px; }
::-webkit-scrollbar-track { background: transparent; }

/* ---------------- Top bar ---------------- */
.topbar {
  display: flex; align-items: center; gap: 24px;
  padding: 14px 22px;
  background: linear-gradient(180deg, var(--bg-1), var(--bg));
  border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 30;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark {
  width: 38px; height: 38px; border-radius: 10px;
  display: grid; place-items: center; font-size: 20px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: var(--on-accent); box-shadow: 0 4px 14px rgba(124,140,255,.4);
}
.brand-title { font-weight: 700; font-size: 16px; letter-spacing: .2px; }
.brand-sub { color: var(--txt-faint); font-size: 11.5px; }

.kpis { display: flex; gap: 10px; margin-left: 6px; flex: 1; }
.kpi {
  background: var(--bg-2); border: 1px solid var(--line);
  border-radius: 10px; padding: 7px 14px; min-width: 86px;
}
.kpi-val { font-size: 18px; font-weight: 700; line-height: 1.1; }
.kpi-lbl { font-size: 10.5px; color: var(--txt-faint); text-transform: uppercase; letter-spacing: .6px; }

.tabs { display: flex; gap: 6px; background: var(--bg-2); padding: 4px; border-radius: 10px; border: 1px solid var(--line); }
.tab {
  border: 0; background: transparent; color: var(--txt-dim);
  padding: 7px 16px; border-radius: 7px; cursor: pointer; font-weight: 600; font-size: 13px;
}
.tab.active { background: var(--accent); color: var(--on-accent); }

.theme-toggle {
  width: 38px; height: 38px; flex-shrink: 0; border-radius: 10px;
  border: 1px solid var(--line); background: var(--bg-2); color: var(--txt-dim);
  cursor: pointer; font-size: 16px; line-height: 1; display: grid; place-items: center;
  transition: border-color .12s, background .12s;
}
.theme-toggle:hover { border-color: var(--accent); color: var(--txt); }

/* ---------------- Views ---------------- */
.view { display: none; flex: 1; }
.view.active { display: flex; }
#view-explore { gap: 0; }

/* ---------------- Sidebar ---------------- */
.sidebar {
  width: 290px; flex-shrink: 0; padding: 18px 16px;
  border-right: 1px solid var(--line); background: var(--bg-1);
  height: calc(100vh - 67px); overflow-y: auto; position: sticky; top: 67px;
}
.search-wrap { position: relative; margin-bottom: 16px; }
#search {
  width: 100%; padding: 11px 32px 11px 14px; border-radius: 10px;
  border: 1px solid var(--line-2); background: var(--bg-3); font-size: 13.5px;
}
#search:focus { outline: none; border-color: var(--accent); }
#search-clear {
  position: absolute; right: 8px; top: 50%; transform: translateY(-50%);
  border: 0; background: transparent; color: var(--txt-faint); font-size: 20px; cursor: pointer;
}
.filter-group { margin-bottom: 18px; }
.filter-head {
  font-size: 11px; text-transform: uppercase; letter-spacing: .7px;
  color: var(--txt-dim); font-weight: 700; margin-bottom: 9px;
  display: flex; justify-content: space-between; cursor: pointer;
}
.filter-head .chev { color: var(--txt-faint); transition: transform .15s; }
.filter-group.collapsed .opts { display: none; }
.filter-group.collapsed .chev { transform: rotate(-90deg); }
.opts { display: flex; flex-direction: column; gap: 2px; max-height: 220px; overflow-y: auto; }
.opt {
  display: flex; align-items: center; gap: 8px; padding: 5px 7px;
  border-radius: 7px; cursor: pointer; font-size: 12.8px; color: var(--txt-dim);
}
.opt:hover { background: var(--bg-3); color: var(--txt); }
.opt input { accent-color: var(--accent); }
.opt .nm { flex: 1; text-transform: capitalize; }
.opt .ct { color: var(--txt-faint); font-size: 11px; font-variant-numeric: tabular-nums; }
.opt.checked { color: var(--txt); }

.range-row { display: flex; justify-content: center; margin-bottom: 4px; }
.range-lbl { font-size: 12px; color: var(--accent-2); font-variant-numeric: tabular-nums; font-weight: 600; }
.dual { position: relative; height: 24px; }
.dual input[type=range] {
  position: absolute; width: 100%; margin: 0; background: transparent;
  pointer-events: none; -webkit-appearance: none; appearance: none; top: 8px;
}
.dual input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none; pointer-events: auto; width: 15px; height: 15px;
  border-radius: 50%; background: var(--accent); cursor: pointer; border: 2px solid var(--bg);
}
.dual::before {
  content: ""; position: absolute; top: 13px; left: 0; right: 0; height: 4px;
  background: var(--line-2); border-radius: 3px;
}
.reset-btn {
  width: 100%; padding: 10px; border-radius: 9px; border: 1px solid var(--line-2);
  background: var(--bg-3); color: var(--txt-dim); cursor: pointer; font-weight: 600; margin-top: 4px;
}
.reset-btn:hover { color: var(--bad); border-color: var(--bad); }

/* ---------------- Results ---------------- */
.results { flex: 1; padding: 18px 22px; min-width: 0; }
.results-bar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 14px; }
.results-count { color: var(--txt-dim); font-size: 13px; }
.results-count b { color: var(--txt); }
.results-tools { display: flex; align-items: center; gap: 10px; font-size: 12.5px; color: var(--txt-dim); }
#sort { background: var(--bg-3); border: 1px solid var(--line-2); border-radius: 8px; padding: 7px 9px; }
.order-btn { background: var(--bg-3); border: 1px solid var(--line-2); border-radius: 8px; width: 34px; height: 34px; cursor: pointer; font-size: 15px; }

.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 14px; }
.card {
  background: var(--bg-1); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 15px 16px; cursor: pointer; transition: border-color .12s, transform .12s;
  display: flex; flex-direction: column; gap: 10px;
}
.card:hover { border-color: var(--accent); transform: translateY(-2px); }
.card-top { display: flex; gap: 6px; flex-wrap: wrap; align-items: center; }
.tag {
  font-size: 10.5px; padding: 2px 8px; border-radius: 20px; font-weight: 600;
  background: var(--bg-3); color: var(--txt-dim); text-transform: capitalize;
  border: 1px solid var(--line-2); white-space: nowrap;
}
.tag.lang { background: rgba(124,140,255,.13); color: #aeb8ff; border-color: transparent; }
.tag.subj { background: rgba(76,201,176,.12); color: #79e3cd; border-color: transparent; }
.card-misc { font-size: 13.5px; line-height: 1.45; color: var(--txt); display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.card-meta { display: flex; justify-content: space-between; align-items: center; color: var(--txt-faint); font-size: 11.5px; }
.persona-chip { text-transform: capitalize; }
.scores { display: flex; gap: 6px; }
.score-pill {
  display: inline-flex; align-items: center; gap: 4px; font-size: 11px; font-weight: 700;
  padding: 3px 8px; border-radius: 7px; font-variant-numeric: tabular-nums;
}
.score-pill .lbl { font-weight: 600; opacity: .7; font-size: 9.5px; text-transform: uppercase; }
.s-good { background: rgba(76,201,176,.15); color: var(--good); }
.s-mid  { background: rgba(233,196,106,.15); color: var(--mid); }
.s-bad  { background: rgba(239,111,111,.15); color: var(--bad); }

.empty { text-align: center; color: var(--txt-faint); padding: 70px 0; grid-column: 1/-1; }

/* ---------------- Pager ---------------- */
.pager { display: flex; justify-content: center; align-items: center; gap: 6px; margin-top: 22px; flex-wrap: wrap; }
.pager button {
  min-width: 34px; height: 34px; border-radius: 8px; border: 1px solid var(--line-2);
  background: var(--bg-2); color: var(--txt-dim); cursor: pointer; padding: 0 10px;
}
.pager button:hover:not(:disabled) { border-color: var(--accent); color: var(--txt); }
.pager button.active { background: var(--accent); color: var(--on-accent); border-color: var(--accent); font-weight: 700; }
.pager button:disabled { opacity: .4; cursor: default; }
.pager .gap { color: var(--txt-faint); }

/* ---------------- Drawer ---------------- */
.drawer-overlay {
  position: fixed; inset: 0; background: rgba(4,6,11,.65); backdrop-filter: blur(2px);
  opacity: 0; pointer-events: none; transition: opacity .2s; z-index: 40;
}
.drawer-overlay.show { opacity: 1; pointer-events: auto; }
.drawer {
  position: fixed; top: 0; right: 0; height: 100vh; width: min(640px, 94vw);
  background: var(--bg-1); border-left: 1px solid var(--line); z-index: 50;
  transform: translateX(100%); transition: transform .25s cubic-bezier(.4,0,.2,1);
  box-shadow: var(--shadow); display: flex; flex-direction: column;
}
.drawer.show { transform: translateX(0); }
.drawer-close {
  position: absolute; top: 14px; right: 16px; z-index: 2; width: 34px; height: 34px;
  border-radius: 9px; border: 1px solid var(--line-2); background: var(--bg-3);
  color: var(--txt-dim); font-size: 20px; cursor: pointer;
}
.drawer-close:hover { color: var(--txt); }
.drawer-body { overflow-y: auto; padding: 24px 26px 60px; }

.d-head { margin-bottom: 18px; padding-right: 40px; }
.d-tags { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 12px; }
.d-misc { font-size: 16px; font-weight: 600; line-height: 1.45; margin-bottom: 6px; }
.d-misctype { color: var(--accent-2); font-size: 12px; text-transform: capitalize; }

.d-scenebox { background: var(--bg-2); border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px; margin: 14px 0; }
.d-scene-lbl { font-size: 10.5px; text-transform: uppercase; letter-spacing: .6px; color: var(--txt-faint); margin-bottom: 4px; }
.d-scene-txt { font-size: 13px; color: var(--txt-dim); line-height: 1.5; font-style: italic; }

.section-lbl { font-size: 11px; text-transform: uppercase; letter-spacing: .8px; color: var(--txt-dim); font-weight: 700; margin: 22px 0 12px; display: flex; align-items: center; gap: 8px; }
.section-lbl::after { content: ""; flex: 1; height: 1px; background: var(--line); }

.chat { display: flex; flex-direction: column; gap: 12px; }
.msg { display: flex; gap: 10px; max-width: 88%; }
.msg.teacher { align-self: flex-start; }
.msg.student { align-self: flex-end; flex-direction: row-reverse; }
.avatar { width: 30px; height: 30px; border-radius: 50%; flex-shrink: 0; display: grid; place-items: center; font-size: 12px; font-weight: 700; color: var(--on-accent); }
.msg.teacher .avatar { background: var(--teacher); }
.msg.student .avatar { background: var(--student); }
.bubble { padding: 10px 13px; border-radius: 13px; line-height: 1.5; font-size: 13.5px; }
.msg.teacher .bubble { background: var(--bg-3); border-top-left-radius: 4px; }
.msg.student .bubble { background: rgba(240,168,104,.13); border-top-right-radius: 4px; }
.bubble .who { font-size: 10.5px; font-weight: 700; opacity: .65; margin-bottom: 3px; text-transform: capitalize; }
.bubble .rec { font-size: 9px; color: var(--good); margin-left: 6px; vertical-align: middle; }
.voice-note { font-size: 11px; color: var(--txt-faint); font-style: italic; margin-top: 6px; padding-left: 10px; border-left: 2px solid var(--line-2); }

.critique { background: var(--bg-2); border: 1px solid var(--line); border-radius: 10px; padding: 13px 15px; margin-bottom: 12px; }
.critique-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 7px; }
.critique-title { font-weight: 700; font-size: 13px; }
.critique-txt { color: var(--txt-dim); font-size: 12.8px; line-height: 1.55; }

.meta-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px 18px; margin-top: 8px; }
.meta-item { font-size: 12px; }
.meta-item .k { color: var(--txt-faint); font-size: 10.5px; text-transform: uppercase; letter-spacing: .5px; }
.meta-item .v { color: var(--txt); text-transform: capitalize; }

/* ---------------- Analytics ---------------- */
.analytics { flex: 1; padding: 22px; display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; align-content: start; }
.panel { background: var(--bg-1); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 20px; }
.panel.wide { grid-column: 1 / -1; }
.panel-title { font-weight: 700; font-size: 14px; margin-bottom: 4px; }
.panel-sub { color: var(--txt-faint); font-size: 11.5px; margin-bottom: 16px; }

.bar-row { display: flex; align-items: center; gap: 10px; margin-bottom: 9px; font-size: 12.5px; }
.bar-row .bl { width: 130px; color: var(--txt-dim); text-transform: capitalize; text-align: right; flex-shrink: 0; }
.bar-track { flex: 1; background: var(--bg-3); border-radius: 6px; height: 20px; overflow: hidden; position: relative; }
.bar-fill { height: 100%; border-radius: 6px; background: linear-gradient(90deg, var(--accent), var(--accent-2)); transition: width .5s; }
.bar-val { width: 52px; text-align: right; color: var(--txt); font-variant-numeric: tabular-nums; font-weight: 600; flex-shrink: 0; }

.dualbar { display: flex; height: 10px; gap: 3px; }
.dualbar .seg { border-radius: 3px; }

.dist { display: flex; align-items: flex-end; gap: 8px; height: 180px; padding-top: 10px; }
.dist-col { flex: 1; display: flex; flex-direction: column; align-items: center; gap: 6px; height: 100%; justify-content: flex-end; }
.dist-bar { width: 100%; max-width: 46px; border-radius: 6px 6px 0 0; background: linear-gradient(180deg, var(--accent), #5a6bd8); min-height: 2px; transition: height .5s; position: relative; }
.dist-bar.lang { background: linear-gradient(180deg, var(--accent-2), #2f9d88); }
.dist-bar .cnt { position: absolute; top: -18px; left: 0; right: 0; text-align: center; font-size: 10.5px; color: var(--txt-dim); }
.dist-x { font-size: 11px; color: var(--txt-faint); }

.heatmap { overflow-x: auto; }
.heat-table { border-collapse: collapse; font-size: 11.5px; }
.heat-table th { color: var(--txt-dim); font-weight: 600; padding: 6px 8px; text-align: center; font-size: 11px; }
.heat-table th.rowh { text-align: right; text-transform: capitalize; }
.heat-table td { width: 46px; height: 38px; text-align: center; border-radius: 6px; color: #0b0e14; font-weight: 700; font-variant-numeric: tabular-nums; }
.legend { display: flex; gap: 16px; margin-top: 8px; font-size: 11.5px; color: var(--txt-dim); align-items: center; }
.legend .sw { display: inline-block; width: 12px; height: 12px; border-radius: 3px; margin-right: 5px; vertical-align: middle; }

.loading { color: var(--txt-faint); text-align: center; padding: 60px; }

@media (max-width: 1100px) { .analytics { grid-template-columns: 1fr; } }
@media (max-width: 820px) {
  .sidebar { display: none; }
  .kpis { display: none; }
}