/* main_distribution_calculator.css — Continuous Distribution Calculator */

:root {
  --dc-primary: var(--primary, #2563eb);
  --dc-accent: #06b6d4;
  --dc-success: #10b981;
  --dc-warning: #f59e0b;
  --dc-danger: #ef4444;
}

/* Distribution Switcher Tabs */
.dist-selector-tabs {
  display: flex;
  gap: 0.5rem;
  background: #f1f5f9;
  padding: 0.4rem;
  border-radius: 12px;
  margin-bottom: 1.5rem;
  border: 1px solid #e2e8f0;
  flex-wrap: wrap;
}

.dist-tab-btn {
  flex: 1;
  min-width: 130px;
  padding: 0.65rem 1rem;
  border: none;
  background: transparent;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.9rem;
  color: #475569;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.dist-tab-btn:hover {
  color: #0f172a;
  background: rgba(255, 255, 255, 0.6);
}

.dist-tab-btn.active {
  background: #ffffff;
  color: var(--dc-primary);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

/* Mode Switcher (Find P vs Find X) */
.calc-mode-bar {
  display: flex;
  gap: 1rem;
  align-items: center;
  background: #ffffff;
  padding: 0.85rem 1.25rem;
  border-radius: 10px;
  border: 1px solid #e2e8f0;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.calc-mode-label {
  font-size: 0.85rem;
  font-weight: 700;
  color: #334155;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.calc-mode-pills {
  display: flex;
  gap: 0.5rem;
  flex: 1;
}

.calc-mode-btn {
  padding: 0.45rem 1rem;
  border: 1px solid #cbd5e1;
  background: #f8fafc;
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  color: #475569;
  cursor: pointer;
  transition: all 0.15s;
}

.calc-mode-btn:hover {
  background: #f1f5f9;
}

.calc-mode-btn.active {
  background: var(--dc-primary);
  color: #ffffff;
  border-color: var(--dc-primary);
}

/* Region Buttons (Left, Right, Two-Tailed, Between) */
.region-buttons {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.region-btn {
  padding: 0.6rem 0.75rem;
  border: 1px solid #cbd5e1;
  background: #f8fafc;
  border-radius: 8px;
  font-size: 0.825rem;
  font-weight: 600;
  color: #475569;
  cursor: pointer;
  text-align: center;
  transition: all 0.2s;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.2rem;
}

.region-btn:hover {
  background: #f1f5f9;
  border-color: #94a3b8;
}

.region-btn.active {
  background: rgba(37, 99, 235, 0.08);
  border-color: var(--dc-primary);
  color: var(--dc-primary);
}

.region-btn-sub {
  font-size: 0.75rem;
  font-weight: normal;
  color: #64748b;
}

/* Presets Bar */
.presets-shelf {
  background: linear-gradient(135deg, rgba(6, 182, 212, 0.06) 0%, rgba(37, 99, 235, 0.06) 100%);
  border: 1px solid rgba(6, 182, 212, 0.25);
  border-radius: 12px;
  padding: 1rem 1.25rem;
  margin-bottom: 1.5rem;
}

.presets-shelf h4 {
  margin: 0 0 0.5rem 0;
  font-size: 0.85rem;
  font-weight: 700;
  color: #0e7490;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.preset-chips {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.preset-chip {
  padding: 0.4rem 0.85rem;
  background: #ffffff;
  border: 1px solid #cbd5e1;
  border-radius: 9999px;
  font-size: 0.8rem;
  font-weight: 600;
  color: #334155;
  cursor: pointer;
  transition: all 0.2s;
}

.preset-chip:hover {
  border-color: var(--dc-primary);
  color: var(--dc-primary);
  box-shadow: 0 2px 6px rgba(37, 99, 235, 0.1);
}

.preset-chip.active {
  background: var(--dc-primary);
  color: #ffffff;
  border-color: var(--dc-primary);
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.25);
}

/* Interactive SVG Canvas */
.dist-canvas-card {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  padding: 1.5rem;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.04);
  margin-top: 1.5rem;
}

.dist-canvas-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
}

.dist-canvas-wrapper {
  width: 100%;
  height: 290px;
  position: relative;
}

.dist-canvas-svg {
  width: 100%;
  height: 100%;
  overflow: visible;
}

/* Probability Spotlight Metric Card */
.prob-spotlight {
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  color: #ffffff;
  border-radius: 12px;
  padding: 1.5rem;
  margin-top: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  box-shadow: 0 4px 16px rgba(15, 23, 42, 0.15);
}

.prob-spotlight-left h3 {
  margin: 0 0 0.35rem 0;
  font-size: 1.05rem;
  color: #94a3b8;
  font-weight: 500;
}

.prob-spotlight-left .math-expression {
  font-size: 1.4rem;
  font-family: monospace;
  font-weight: 700;
  color: #38bdf8;
}

.prob-spotlight-right {
  text-align: right;
}

.prob-spotlight-num {
  font-size: 2.75rem;
  font-weight: 900;
  color: #ffffff;
  letter-spacing: -0.03em;
  line-height: 1;
}

.prob-spotlight-sub {
  font-size: 0.95rem;
  color: #94a3b8;
  margin-top: 0.35rem;
}

/* Grid controls */
.calc-controls-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
  margin-top: 1.25rem;
}

.control-item {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.control-item label {
  font-size: 0.85rem;
  font-weight: 600;
  color: #334155;
  display: flex;
  justify-content: space-between;
}

.control-item input[type="number"],
.control-item input[type="range"] {
  padding: 0.6rem;
  border: 1px solid #cbd5e1;
  border-radius: 8px;
  font-size: 0.95rem;
}

.control-item .range-flex {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.control-item .range-flex input[type="range"] {
  flex: 1;
}

.control-item .range-flex span {
  font-family: monospace;
  font-weight: 700;
  width: 45px;
  text-align: right;
  color: #0f172a;
}