:root {
  --bg: #0f0f0f;
  --card: #1a1a1a;
  --border: #313131;
  --text-1: #e8e8e8;
  --text-2: #bababa;
  --text-3: #767676;
  --green: #56ca00;
  --blue: #16b1ff;
  --red: #ff5a5a;
  --amber: #ffb454;
  --radius: 8px;
  --gap: 16px;
  --sidebar-w: 240px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }

/* Ensure [hidden] elements are truly hidden even if their display is overridden later. */
[hidden] { display: none !important; }
body {
  background: var(--bg);
  color: var(--text-1);
  font-family: "Poppins", system-ui, sans-serif;
  font-weight: 400;
  font-size: 14px;
  line-height: 1.4;
  -webkit-font-smoothing: antialiased;
}
code { font-family: "SF Mono", Menlo, monospace; font-size: 12px; color: var(--text-2); }
.muted { color: var(--text-3); }

/* Shell */
.shell {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  background: #0a0a0a;
  border-right: 1px solid var(--border);
  padding: 24px 16px;
  display: flex;
  flex-direction: column;
  gap: 24px;
  position: sticky;
  top: 0;
  height: 100vh;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 6px;
}
.brand__dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: linear-gradient(135deg, var(--blue), var(--green));
}
.brand__name {
  font-weight: 600;
  font-size: 15px;
  color: var(--text-1);
  letter-spacing: 0.01em;
}

.nav { display: flex; flex-direction: column; gap: 4px; flex: 1; }
.nav__item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: 6px;
  color: var(--text-2);
  cursor: pointer;
  border: 0;
  background: transparent;
  font: inherit;
  text-align: left;
  transition: background .15s, color .15s;
}
.nav__item:hover { background: rgba(255,255,255,0.04); color: var(--text-1); }
.nav__item.is-active {
  background: rgba(22, 177, 255, 0.12);
  color: var(--blue);
}
.nav__icon { width: 18px; height: 18px; flex-shrink: 0; }
.nav__label { flex: 1; font-size: 14px; }

.sidebar__foot {
  font-size: 12px;
  padding: 0 6px;
  border-top: 1px solid var(--border);
  padding-top: 16px;
}

/* Main app */
.app {
  max-width: 1480px;
  padding: 28px 28px 48px;
  display: flex;
  flex-direction: column;
  gap: var(--gap);
  min-width: 0;
}

/* Topbar */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.topbar__left h1 {
  font-size: 22px;
  font-weight: 600;
  margin: 0 0 2px 0;
  color: var(--text-1);
}
.topbar__left p { margin: 0; font-size: 13px; }
.topbar__right { display: flex; align-items: center; gap: 12px; }

.segmented {
  display: inline-flex;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 4px;
}
.segmented button {
  background: transparent;
  border: 0;
  color: var(--text-3);
  padding: 6px 14px;
  border-radius: 6px;
  cursor: pointer;
  font: inherit;
  transition: background .15s, color .15s;
}
.segmented button:hover { color: var(--text-2); }
.segmented button.is-active {
  background: rgba(22, 177, 255, 0.12);
  color: var(--blue);
}

.btn {
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text-1);
  padding: 8px 14px;
  border-radius: var(--radius);
  font: inherit;
  cursor: pointer;
}
.btn--ghost { color: var(--text-2); }
.btn:hover { border-color: #4a4a4a; }

.select {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-1);
  padding: 8px 12px;
  font: inherit;
  font-size: 13px;
  cursor: pointer;
  min-width: 130px;
}
.select:hover { border-color: #4a4a4a; }
.select:focus { outline: none; border-color: var(--blue); }

/* Sub-tabs */
.subtabs {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--border);
  padding: 0 2px 0;
  margin-bottom: 4px;
}
.subtab {
  background: transparent;
  border: 0;
  color: var(--text-3);
  padding: 10px 14px;
  font: inherit;
  font-size: 13px;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: color .15s, border-color .15s;
}
.subtab:hover { color: var(--text-2); }
.subtab.is-active {
  color: var(--blue);
  border-bottom-color: var(--blue);
}

/* KPI row */
.kpi-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--gap);
}
.kpi {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  position: relative;
  overflow: hidden;
}
.kpi__label { color: var(--text-3); font-size: 13px; }
.kpi__value {
  font-size: 26px;
  font-weight: 500;
  color: var(--text-1);
  letter-spacing: -0.01em;
}
.kpi__delta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--text-2);
}
.kpi__delta .chip {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 2px 8px; border-radius: 999px;
  font-weight: 500;
}
.kpi__delta .chip.up   { background: rgba(86, 202, 0, 0.12);  color: var(--green); }
.kpi__delta .chip.down { background: rgba(255, 90, 90, 0.12); color: var(--red); }
.kpi__spark { height: 38px; margin-top: 4px; }

/* Chart rows */
.chart-row {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--gap);
}
.chart-row--bottom { grid-template-columns: 2fr 1fr; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-height: 320px;
}
.card__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.card__head h3 {
  margin: 0;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-1);
}
.card__body { flex: 1; position: relative; min-height: 260px; min-width: 0; }

/* Chart container — fixed height prevents Chart.js vertical-expansion loop
   (maintainAspectRatio:false + a flex-grow parent ratchets up on every resize). */
.chart-frame {
  position: relative;
  width: 100%;
  height: 260px;
}
.chart-frame > canvas {
  position: absolute !important;
  top: 0; left: 0;
  width: 100% !important;
  height: 100% !important;
}

/* Also cap the KPI sparkline strictly. */
.kpi__spark { height: 38px !important; max-height: 38px; width: 100% !important; }

/* Donut canvas stays inside .donut-wrap (already 180×180). */
.card__body--center {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}
canvas { max-width: 100%; }

.tag {
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 3px 10px;
  font-size: 12px;
  color: var(--text-2);
}

.legend {
  display: flex; gap: 14px; flex-wrap: wrap;
  font-size: 12px; color: var(--text-2);
}
.legend--col { flex-direction: column; gap: 10px; align-items: flex-start; }
.legend .swatch {
  display: inline-block;
  width: 8px; height: 8px;
  border-radius: 50%;
  margin-right: 6px;
  vertical-align: middle;
}

/* Donut */
.donut-wrap {
  position: relative;
  width: 180px; height: 180px;
  flex-shrink: 0;
}
.donut-center {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}
.donut-value { font-size: 22px; font-weight: 500; color: var(--text-1); }
.donut-label { font-size: 12px; color: var(--text-3); }

/* Table */
.data-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.data-table th {
  text-align: left;
  color: var(--text-3);
  font-weight: 500;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.data-table td {
  padding: 12px;
  border-bottom: 1px solid rgba(49, 49, 49, 0.5);
  color: var(--text-2);
}
.data-table tbody tr:last-child td { border-bottom: 0; }
.data-table td.num { text-align: right; color: var(--text-1); font-variant-numeric: tabular-nums; }
.data-table td.delta-up   { color: var(--green); text-align: right; }
.data-table td.delta-down { color: var(--red);   text-align: right; }

/* Progress */
.progress-list { display: flex; flex-direction: column; gap: 16px; }
.progress-item { display: flex; flex-direction: column; gap: 6px; }
.progress-item__head {
  display: flex; justify-content: space-between; align-items: baseline;
  font-size: 13px;
}
.progress-item__label { color: var(--text-2); }
.progress-item__value { color: var(--text-1); font-weight: 500; font-variant-numeric: tabular-nums; }
.progress-track {
  background: rgba(255,255,255,0.05);
  border-radius: 999px;
  height: 8px;
  overflow: hidden;
}
.progress-fill { height: 100%; border-radius: 999px; }

/* Footer */
.foot {
  display: flex; justify-content: space-between;
  padding-top: 8px; font-size: 12px;
}

/* Sidebar admin block */
.nav--admin {
  flex: none;
  border-top: 1px solid var(--border);
  padding-top: 12px;
  margin-top: auto;
}

/* Upload view */
.upload-view { padding-top: 28px; }
.upload-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--gap);
}
.upload-card { min-height: 0; }
.upload-card--wide { grid-column: 1 / -1; }
.upload-body { display: flex; flex-direction: column; gap: 12px; min-height: 0; }

.upload-input {
  background: #0a0a0a;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-1);
  padding: 10px 12px;
  font: inherit;
  width: 100%;
  max-width: 420px;
}
.upload-input:focus { outline: none; border-color: var(--blue); }

.dropzone {
  border: 1px dashed var(--border);
  border-radius: 8px;
  padding: 28px 20px;
  cursor: pointer;
  transition: border-color .15s, background .15s;
  display: block;
}
.dropzone:hover, .dropzone.is-drag {
  border-color: var(--blue);
  background: rgba(22, 177, 255, 0.04);
}
.dropzone__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-2);
  text-align: center;
}
.dropzone__inner svg { color: var(--text-3); }
.dropzone__inner .accent { color: var(--blue); }
.dropzone__inner p { margin: 0; font-size: 13px; }

.upload-btn {
  align-self: flex-start;
  background: var(--blue);
  color: #0a0a0a;
  border: 0;
  font-weight: 500;
  padding: 10px 18px;
}
.upload-btn:disabled { opacity: 0.4; cursor: not-allowed; }
.upload-btn:not(:disabled):hover { background: #39bbff; }

.upload-log {
  background: #0a0a0a;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 14px;
  font-family: "SF Mono", Menlo, monospace;
  font-size: 12px;
  white-space: pre-wrap;
  min-height: 120px;
  max-height: 320px;
  overflow: auto;
  color: var(--text-2);
}
.upload-log.is-error { color: var(--red); }
.upload-log.is-success { color: var(--green); }

.upload-steps {
  margin: 0;
  padding-left: 18px;
  color: var(--text-2);
  font-size: 13px;
  line-height: 1.7;
}
.upload-steps code { color: var(--text-1); }

@media (max-width: 900px) {
  .upload-grid { grid-template-columns: 1fr; }
  .upload-card--wide { grid-column: auto; }
}

/* Responsive */
@media (max-width: 1100px) {
  .kpi-row { grid-template-columns: repeat(2, 1fr); }
  .chart-row, .chart-row--bottom { grid-template-columns: 1fr; }
}
@media (max-width: 900px) {
  .shell { grid-template-columns: 1fr; }
  .sidebar {
    position: static;
    height: auto;
    flex-direction: row;
    padding: 12px 16px;
    overflow-x: auto;
    gap: 12px;
  }
  .brand { padding: 0; }
  .nav { flex-direction: row; flex: 1; gap: 4px; }
  .nav__item { padding: 8px 10px; font-size: 13px; white-space: nowrap; }
  .sidebar__foot { display: none; }
  .app { padding: 20px 16px 32px; }
}
@media (max-width: 560px) {
  .kpi-row { grid-template-columns: 1fr; }
  .topbar { flex-direction: column; align-items: flex-start; }
}