:root {
  --page-bg: #f8f9fb;
  --card-bg: #fff;
  --header-bg: #1e293b;
  --header-text: #f1f5f9;
  --accent: #f97316;
  --accent-light: #ffedd5;
  --border: #e2e8f0;
  --text: #334155;
  --text-light: #64748b;
  --shadow: 0 4px 24px rgba(15, 23, 42, 0.07);
  --radius: 12px;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--page-bg);
  color: var(--text);
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.table-selector-nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  margin-bottom: 1.5rem;
  padding: 0.65rem 1rem;
  border-bottom: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 1px 6px rgba(0, 0, 0, 0.04);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.selector-inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  max-width: 1100px;
  margin: 0 auto;
  align-items: center;
  gap: 1rem;
}

.nav-back {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.35rem 0.6rem;
  border-radius: 6px;
  color: var(--text);
  font-size: 0.86rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  text-decoration: none;
  transition: all 0.15s ease;
  justify-self: start;
  white-space: nowrap;
}

.nav-back:hover {
  background: #f1f5f9;
  color: var(--header-bg);
  text-decoration: none;
}

.nav-back-icon {
  flex: 0 0 auto;
  display: block;
}

.tabs-list {
  display: inline-flex;
  gap: 3px;
  padding: 3px;
  border-radius: 8px;
  background: #e2e8f0;
  justify-self: center;
  max-width: 100%;
}

.tab-button {
  flex: 0 0 auto;
  padding: 0.45rem 0.95rem;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--text-light);
  font: inherit;
  font-size: 0.86rem;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  transition: color 0.15s ease, background 0.15s ease;
}

.tab-button:hover {
  color: var(--text);
}

.tab-button.active {
  background: var(--card-bg);
  color: var(--text);
  font-weight: 600;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12);
}

.print-button {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--card-bg);
  border: 1px solid var(--border);
  padding: 0.42rem 0.85rem;
  border-radius: 6px;
  font-family: inherit;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text);
  cursor: pointer;
  transition: all 0.15s ease;
  justify-self: end;
  white-space: nowrap;
}

.print-button:hover {
  border-color: #cbd5e1;
  background: #f8fafc;
}

.nav-back:focus-visible,
.tab-button:focus-visible,
.print-button:focus-visible,
.btn-add:focus-visible,
.stat-select:focus-visible,
.curve-remove:focus-visible,
input[type="range"]:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}

main.distribution-main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1rem 2.5rem;
}

.distribution-pane {
  margin-bottom: 0;
  padding: 1.5rem 2rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card-bg);
  box-shadow: var(--shadow);
}

.distribution-pane[hidden] {
  display: none !important;
}

#uniforme,
#exponencial,
#normal,
#gamma,
#beta {
  --accent: #f97316;
  --accent-light: #ffedd5;
}

.distribution-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin: 0 0 1.25rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

.distribution-heading h1 {
  margin: 0;
  color: var(--header-bg);
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.25;
}

.distribution-model {
  flex: 0 0 auto;
  color: var(--text-light);
  font-size: 1rem;
}

.distribution-formulas {
  display: grid;
  gap: 0.65rem;
  margin-bottom: 1.25rem;
}

.formula-block {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  align-items: center;
  gap: 1rem;
  min-width: 0;
  padding: 0.75rem 1rem;
  border-left: 4px solid var(--accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  background: var(--page-bg);
}

.formula-label {
  margin: 0;
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.formula-math {
  min-width: 0;
  overflow-x: auto;
  color: var(--text);
  font-size: 1rem;
}

.formula-math mjx-container[display="true"] {
  margin: 0.2rem 0 !important;
}

.distribution-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 0.9rem;
  margin-bottom: 0.8rem;
  padding: 0.9rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--page-bg);
}

.slider-group {
  display: block;
  flex: 1 1 220px;
  min-width: min(100%, 220px);
}

.slider-label {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 0.45rem;
  color: var(--text-light);
  font-size: 0.82rem;
  font-weight: 600;
}

.slider-val {
  color: var(--accent);
  font-variant-numeric: tabular-nums;
  font-size: 0.9rem;
  font-weight: 700;
}

input[type="range"] {
  width: 100%;
  height: 5px;
  border-radius: 999px;
  accent-color: var(--accent);
  cursor: pointer;
}

.btn-add {
  flex: 0 0 auto;
  padding: 0.48rem 0.85rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--card-bg);
  color: var(--text);
  font: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: border-color 0.15s ease, background 0.15s ease;
}

.btn-add:hover {
  border-color: var(--accent);
  background: var(--accent-light);
}

.stat-dot {
  width: 8px;
  height: 8px;
  flex: 0 0 auto;
  border-radius: 50%;
}

.plots-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin: 0 0 1rem;
}

.plot-wrap {
  min-width: 0;
  margin: 0;
  padding: 1rem 0.75rem 0.5rem;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--card-bg);
}

.plot-wrap > div:last-child {
  display: flex;
  align-items: center;
  justify-content: center;
}

.plot-wrap svg {
  width: 100% !important;
  height: auto !important;
}

.plot-title {
  margin: 0 0 0.35rem;
  color: var(--text-light);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.plot-wrap text {
  font-family: inherit !important;
  font-size: 12px !important;
  fill: var(--text) !important;
}

.plot-wrap [aria-label="y-axis tick label"] text,
.plot-wrap [aria-label="x-axis tick label"] text {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace !important;
  font-size: 11px !important;
  fill: var(--text-light) !important;
}

.plot-wrap [aria-label="y-axis label"] text,
.plot-wrap [aria-label="x-axis label"] text {
  font-size: 12px !important;
  font-weight: 600 !important;
  fill: var(--header-bg) !important;
}

.stats-row {
  display: grid;
  gap: 0.35rem;
  padding: 0.55rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--page-bg);
}

.stat-row {
  display: flex;
  align-items: center;
  min-width: 0;
  gap: 0.25rem;
  border-radius: 7px;
}

.stat-select {
  display: flex;
  flex: 1 1 auto;
  min-width: 0;
  align-items: center;
  gap: 0.6rem;
  padding: 0.4rem 0.5rem;
  border: 1px solid transparent;
  border-radius: 7px;
  background: transparent;
  color: var(--text);
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.stat-select:hover,
.stat-row.is-active .stat-select {
  border-color: color-mix(in srgb, var(--curve-color) 40%, var(--border));
  background: color-mix(in srgb, var(--curve-color) 7%, white);
}

.stat-dot {
  background: var(--curve-color);
}

.curve-name {
  flex: 0 0 auto;
  color: var(--text);
  font-size: 0.75rem;
  font-weight: 700;
}

.curve-params {
  flex: 1 1 auto;
  min-width: 5rem;
  color: var(--text-light);
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 0.75rem;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.stat-pair {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: baseline;
  gap: 0.3rem;
}

.stat-key {
  color: var(--text-light);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.stat-val {
  color: var(--header-bg);
  font-variant-numeric: tabular-nums;
  font-size: 0.85rem;
  font-weight: 700;
}

.curve-remove {
  display: grid;
  width: 2rem;
  height: 2rem;
  flex: 0 0 auto;
  place-items: center;
  border: 1px solid transparent;
  border-radius: 7px;
  background: transparent;
  color: var(--text-light);
  font: inherit;
  font-size: 1.1rem;
  line-height: 1;
  cursor: pointer;
}

.curve-remove:hover {
  border-color: #fecdd3;
  background: #fff1f2;
  color: #b4233d;
}

@media (max-width: 768px) {
  .distribution-pane {
    padding: 1.25rem;
  }

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

@media (max-width: 680px) {
  .table-selector-nav {
    margin-bottom: 1rem;
    padding: 0.55rem 0.75rem;
  }

  .selector-inner {
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto auto;
    gap: 0.6rem 0.5rem;
  }

  .nav-back {
    grid-column: 1;
    grid-row: 1;
    justify-self: start;
  }

  .print-button {
    grid-column: 2;
    grid-row: 1;
    justify-self: end;
  }

  .tabs-list {
    grid-column: 1 / -1;
    grid-row: 2;
    justify-self: center;
    max-width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }

  .tabs-list::-webkit-scrollbar {
    display: none;
  }

  .tab-button {
    padding: 0.42rem 0.68rem;
    font-size: 0.8rem;
  }

  main.distribution-main {
    padding: 0 0.75rem 1.5rem;
  }

  .distribution-pane {
    padding: 1rem;
  }

  .distribution-heading {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.35rem;
  }

  .distribution-heading h1 {
    font-size: 1.5rem;
  }

  .formula-block {
    grid-template-columns: 1fr;
    gap: 0.35rem;
    padding: 0.65rem 0.75rem;
  }

  .distribution-controls {
    gap: 0.75rem;
  }

  .slider-group {
    flex-basis: 100%;
  }

  .plot-wrap {
    padding: 0.85rem 0.5rem 0.35rem;
  }

  .stat-select {
    flex-wrap: wrap;
    gap: 0.4rem 0.55rem;
  }

  .curve-params {
    flex-basis: 55%;
  }
}

@media print {
  *, *::before, *::after {
    -webkit-print-color-adjust: exact !important;
    print-color-adjust: exact !important;
  }

  .no-print,
  .table-selector-nav,
  .distribution-controls,
  .btn-add,
  .curve-remove {
    display: none !important;
  }

  body {
    background: #fff !important;
    padding: 0 !important;
    color: #0f172a !important;
  }

  main.distribution-main {
    max-width: 100% !important;
    padding: 0 !important;
    margin: 0 !important;
  }

  .distribution-pane {
    box-shadow: none !important;
    border: none !important;
    padding: 0 !important;
  }

  .distribution-pane[hidden],
  .distribution-pane:not(.active) {
    display: none !important;
  }

  .distribution-pane.active {
    display: block !important;
  }

  .plot-wrap {
    border: 1px solid #cbd5e1 !important;
    box-shadow: none !important;
    page-break-inside: avoid !important;
    break-inside: avoid !important;
  }

  .formula-block {
    background: #f8fafc !important;
    border-left: 4px solid #f97316 !important;
    page-break-inside: avoid !important;
    break-inside: avoid !important;
  }

  .stats-row {
    background: #f8fafc !important;
    border: 1px solid #cbd5e1 !important;
    page-break-inside: avoid !important;
    break-inside: avoid !important;
  }
}