:root {
  color-scheme: dark;
  --bg: #0b1020;
  --panel: #121a30;
  --panel-2: #18233f;
  --card: rgba(18, 26, 48, 0.92);
  --text: #e8eefc;
  --muted: #9eb0d1;
  --baseline: #77c3ff;
  --reform: #7af0b5;
  --marker: #f3b76b;
  --accent: #8ba8ff;
  --danger: #ff8b8b;
  --border: rgba(255, 255, 255, 0.08);
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: radial-gradient(circle at top, #18284b 0%, var(--bg) 55%);
  color: var(--text);
}

.app-shell {
  max-width: 1500px;
  margin: 0 auto;
  padding: 24px;
}

.hero {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: flex-start;
  margin-bottom: 24px;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--marker);
  font-size: 12px;
  margin-bottom: 6px;
}

h1 {
  margin: 0 0 12px;
  font-size: clamp(2rem, 4vw, 3.5rem);
}

.lead {
  max-width: 850px;
  line-height: 1.55;
  color: #d7e2fb;
  font-size: 1.05rem;
}

.hero-copy {
  flex: 1 1 auto;
}

.button-primary,
.button-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 16px;
  border-radius: 14px;
  text-decoration: none;
  font-weight: 600;
  transition: transform 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}

.button-primary {
  background: linear-gradient(135deg, #7aa2ff, #8cd7ff);
  color: #09111f;
}

.button-secondary {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: var(--text);
}

.button-primary:hover,
.button-secondary:hover {
  transform: translateY(-1px);
}

.preset-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 12px 0 18px;
}

.preset-row .button-secondary {
  padding: 8px 12px;
  font-size: 0.85rem;
}

.mini-label {
  margin: 0 0 10px;
  color: var(--marker);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.mode-switch {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: center;
  margin-bottom: 22px;
}

.mode-switch-copy {
  margin: 0;
  max-width: 760px;
  line-height: 1.55;
}

.tab-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.user-mode-toggle {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.mode-button {
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  border-radius: 999px;
  padding: 8px 12px;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

.mode-button.is-active {
  background: linear-gradient(135deg, rgba(122, 162, 255, 0.28), rgba(122, 240, 181, 0.18));
  border-color: rgba(139, 168, 255, 0.45);
}

body[data-user-mode="basic"] .expert-only {
  display: none !important;
}

.tab-button {
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  border-radius: 999px;
  padding: 10px 14px;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

.tab-button.is-active {
  background: linear-gradient(135deg, rgba(122, 162, 255, 0.28), rgba(122, 240, 181, 0.18));
  border-color: rgba(139, 168, 255, 0.45);
}

.layout {
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: 22px;
}

.left-panel, .main-panel {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 18px;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.22);
  backdrop-filter: blur(18px);
}

.subtle {
  background: rgba(24, 35, 63, 0.75);
}

.accent-card {
  border-color: rgba(122, 240, 181, 0.25);
}

.hero-note {
  max-width: 390px;
}

.note-title, .stat-label {
  color: var(--muted);
  font-size: 0.88rem;
  margin-bottom: 10px;
}

h2 {
  margin: 0 0 14px;
  font-size: 1.1rem;
}

label {
  display: block;
  margin-bottom: 14px;
  color: var(--muted);
  font-size: 0.94rem;
}

.section-heading {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: flex-start;
  margin-bottom: 14px;
}

.section-copy {
  margin: 6px 0 0;
}

.mobile-priority-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(122, 240, 181, 0.12);
  border: 1px solid rgba(122, 240, 181, 0.24);
  color: #d8fff0;
  font-size: 0.8rem;
}

.control-grid {
  display: grid;
  gap: 14px;
}

.compact-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

select, input[type="range"] {
  display: block;
  width: 100%;
  margin-top: 8px;
}

select {
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px 12px;
}

input[type="range"] {
  accent-color: var(--accent);
}

.check-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.check-group label {
  color: var(--text);
  font-size: 0.92rem;
  margin-bottom: 0;
}

.value-pill {
  display: inline-block;
  margin-top: 8px;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.07);
  color: var(--text);
  font-size: 0.9rem;
}

.muted { color: var(--muted); }
.small { font-size: 0.88rem; line-height: 1.45; }

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.stat-card {
  min-height: 128px;
}

.stat-value {
  font-size: 1.45rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.stat-sub {
  color: var(--muted);
  line-height: 1.45;
}

.chart-card {
  padding: 16px 16px 10px;
}

.chart-header {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 8px;
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
  color: var(--muted);
  font-size: 0.9rem;
}

.legend-line {
  display: inline-block;
  width: 28px;
  height: 4px;
  border-radius: 999px;
  margin-right: 6px;
  vertical-align: middle;
}

.legend-line.baseline { background: var(--baseline); }
.legend-line.reform { background: var(--reform); }
.legend-line.marker { background: var(--marker); }

#chart {
  width: 100%;
  height: auto;
  background: linear-gradient(180deg, rgba(255,255,255,0.03), rgba(255,255,255,0.01));
  border-radius: 18px;
}

.grid-two {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.compact-list {
  margin: 0;
  padding-left: 18px;
  line-height: 1.6;
}

.sources li { margin-bottom: 6px; }

#explanation p {
  margin: 0 0 12px;
  line-height: 1.6;
}

#explanation strong {
  color: #fff;
}

.insight-box {
  margin: 0 0 16px;
  padding: 14px 16px;
  border-radius: 16px;
  background: rgba(96, 165, 250, 0.08);
  border: 1px solid rgba(96, 165, 250, 0.22);
}

.insight-box h3 {
  margin: 0 0 10px;
  font-size: 0.98rem;
}

.insight-box ul {
  margin: 0;
  padding-left: 18px;
  line-height: 1.6;
}

.insight-box li + li {
  margin-top: 6px;
}

.insight-box .muted-note {
  margin-top: 10px;
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.5;
}

.tab-context-card {
  padding-bottom: 12px;
}

.tab-context[hidden] {
  display: none !important;
}

.diagnosis-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

body[data-active-tab="status"] .tab-panel,
body[data-active-tab="status"] .tab-panel-inline {
  display: none !important;
}

body[data-active-tab="reform"] .tab-panel {
  display: block;
}

body[data-active-tab="reform"] .tab-panel-inline {
  display: inline-flex;
}

.disclosure-card {
  padding: 0;
  overflow: hidden;
}

.disclosure-card summary {
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 18px;
  cursor: pointer;
}

.disclosure-card summary::-webkit-details-marker {
  display: none;
}

.disclosure-card summary::after {
  content: '▾';
  color: var(--muted);
  font-size: 0.95rem;
  transition: transform 0.18s ease;
}

.disclosure-card[open] summary::after {
  transform: rotate(180deg);
}

.summary-note {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 400;
}

.disclosure-body {
  padding: 0 18px 18px;
}

.disclosure-copy {
  margin: 0 0 14px;
}

/* ---- COMPONENT TOGGLES ---- */

.component-toggles {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.comp-row {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: 12px;
  padding: 10px 12px;
  border-left: 3px solid var(--comp-color, #fff);
}

.comp-header {
  display: flex;
  align-items: center;
  gap: 8px;
}

.comp-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--comp-color, #fff);
  flex-shrink: 0;
}

.comp-name {
  flex: 1;
  font-size: 0.88rem;
  color: var(--text);
}

.comp-rate {
  font-size: 0.78rem;
  color: var(--muted);
  margin-top: 4px;
  padding-left: 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.comp-note {
  margin: 8px 0 0;
  padding-left: 16px;
  font-size: 0.8rem;
  line-height: 1.45;
  color: var(--muted);
}

.status-badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 8px;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border: 1px solid rgba(255,255,255,0.12);
  background: rgba(255,255,255,0.06);
  color: var(--text);
}

.status-badge.status-quo {
  background: rgba(255,255,255,0.08);
  color: #b8c5e0;
}

.status-badge.compensation {
  background: rgba(122, 240, 181, 0.14);
  border-color: rgba(122, 240, 181, 0.35);
  color: #b8f5d8;
}

.status-badge.tariff {
  background: rgba(243, 183, 107, 0.14);
  border-color: rgba(243, 183, 107, 0.35);
  color: #fde3b8;
}

.status-badge.combined {
  background: rgba(139, 168, 255, 0.14);
  border-color: rgba(139, 168, 255, 0.35);
  color: #c8d8ff;
}

.status-badge.idle {
  background: rgba(255, 139, 139, 0.12);
  border-color: rgba(255, 139, 139, 0.28);
  color: #ffcfcf;
}

/* Toggle switch */
.toggle-switch {
  position: relative;
  display: inline-block;
  margin: 0;
  cursor: pointer;
}

.toggle-switch input {
  position: absolute;
  opacity: 0;
  width: 1px;
  height: 1px;
  margin: 0;
  pointer-events: none;
}

.toggle-track {
  display: block;
  width: 36px;
  height: 20px;
  background: rgba(255,255,255,0.15);
  border-radius: 999px;
  transition: background 0.2s;
  position: relative;
  outline: 2px solid transparent;
  outline-offset: 2px;
  transition: background 0.2s, outline-color 0.1s;
}

.toggle-thumb {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 14px;
  height: 14px;
  background: #fff;
  border-radius: 50%;
  transition: left 0.2s;
}

.toggle-switch input:checked + .toggle-track {
  background: var(--comp-color, var(--reform));
}

.toggle-switch input:focus-visible + .toggle-track {
  outline-color: var(--comp-color, var(--accent));
}

.toggle-switch input:checked + .toggle-track .toggle-thumb {
  left: 19px;
}

/* Component legend (stacked view) */
.comp-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  margin-top: 8px;
  padding: 0 4px;
  font-size: 0.85rem;
  color: var(--muted);
}

.comp-swatch {
  display: inline-block;
  width: 12px;
  height: 12px;
  border-radius: 3px;
  background: var(--comp-color);
  margin-right: 4px;
  vertical-align: middle;
}

/* Delta-area legend (non-stacked views) */
.delta-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  margin-top: 8px;
  padding: 0 4px;
  font-size: 0.85rem;
  color: var(--muted);
}

.legend-swatch {
  display: inline-block;
  width: 14px;
  height: 14px;
  border-radius: 4px;
  margin-right: 6px;
  vertical-align: middle;
}

.legend-swatch-positive { background: rgba(122, 240, 181, 0.45); }
.legend-swatch-negative { background: rgba(255, 139, 139, 0.45); }

/* Taper zone legend */
.legend-taper {
  color: rgba(167, 139, 250, 0.6);
  font-size: 0.88rem;
}

/* Axis label small */
.axis-label-small {
  fill: #6a84aa;
  font-size: 10px;
  font-family: Inter, sans-serif;
}

@media (max-width: 1180px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .mode-switch {
    display: grid;
  }

  .main-panel {
    order: 1;
  }

  .left-panel {
    order: 2;
  }

  .chart-card {
    order: 1;
  }

  .stats-grid {
    order: 2;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .grid-two {
    order: 3;
    grid-template-columns: 1fr;
  }

  .hero {
    flex-direction: column;
  }

  .hero-note {
    max-width: none;
  }
}

@media (max-width: 760px) {
  .app-shell { padding: 14px; }

  .hero {
    gap: 16px;
  }

  .tab-buttons {
    flex-direction: column;
  }

  .layout {
    gap: 16px;
  }

  .main-panel,
  .left-panel {
    gap: 14px;
  }

  .card {
    border-radius: 16px;
    padding: 16px;
  }

  .chart-card {
    padding: 14px 14px 10px;
  }

  .chart-header {
    flex-direction: column;
    gap: 12px;
  }

  .stats-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .diagnosis-grid {
    grid-template-columns: 1fr;
  }

  .stat-card-focus {
    order: 1;
    grid-column: 1 / -1;
  }

  .stat-card-next {
    order: 2;
  }

  .stat-card-reform {
    order: 3;
  }

  .stat-card-baseline {
    order: 4;
  }

  .compact-grid {
    grid-template-columns: 1fr;
  }

  .section-heading {
    flex-direction: column;
  }

  .mobile-priority-pill {
    align-self: flex-start;
  }

  .disclosure-card {
    padding: 0;
  }

  .disclosure-card:not(.core-controls):not([open]) {
    background: rgba(18, 26, 48, 0.82);
  }
}

@media (max-width: 520px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }

  .stat-card-next,
  .stat-card-reform,
  .stat-card-baseline {
    order: initial;
  }
}