/* Paleta categórica validada para daltonismo y contraste, en modo claro y oscuro. */
:root {
  color-scheme: light;
  --page: #f9f9f7;
  --surface: #fcfcfb;
  --ink: #0b0b0b;
  --ink-2: #52514e;
  --muted: #6f6d68;
  --grid: #e1e0d9;
  --axis: #c3c2b7;
  --border: rgba(11, 11, 11, 0.1);
  --good: #006300;
  --bad: #b3312f;
  --warn: #b26b00;
  --warn-mark: #fab219;
  --base: #898781;
  --tv_S: #2a78d6;
  --ooh_S: #eb6834;
  --print_S: #1baf7a;
  --facebook_S: #eda100;
  --search_S: #e87ba4;
  --accent: #2a78d6;
  --model-1: #2a78d6;
  --model-2: #eb6834;
  --selection: rgba(42, 120, 214, 0.18);
  --shadow:
    0 0 0 1px var(--border), 0 1px 2px rgba(11, 11, 11, 0.04),
    0 12px 32px -16px rgba(11, 11, 11, 0.14);
  --font: system-ui, -apple-system, "Segoe UI", sans-serif;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-swift: cubic-bezier(0.2, 0, 0, 1);
  --radius-card: 16px;
  --radius-control: 8px;
}

@media (prefers-color-scheme: dark) {
  :root:where(:not([data-theme="light"])) {
    color-scheme: dark;
    --page: #0d0d0d;
    --surface: #1a1a19;
    --ink: #f0efec;
    --ink-2: #c3c2b7;
    --muted: #9a988f;
    --grid: #2c2c2a;
    --axis: #383835;
    --border: rgba(255, 255, 255, 0.1);
    --good: #0ca30c;
    --bad: #e66767;
    --warn: #fab219;
    --warn-mark: #fab219;
    --tv_S: #3987e5;
    --ooh_S: #d95926;
    --print_S: #199e70;
    --facebook_S: #c98500;
    --search_S: #d55181;
    --accent: #3987e5;
    --model-1: #3987e5;
    --model-2: #d95926;
    --selection: rgba(57, 135, 229, 0.32);
    --shadow: 0 0 0 1px var(--border), 0 16px 40px -20px rgba(0, 0, 0, 0.7);
  }
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --page: #0d0d0d;
  --surface: #1a1a19;
  --ink: #f0efec;
  --ink-2: #c3c2b7;
  --muted: #9a988f;
  --grid: #2c2c2a;
  --axis: #383835;
  --border: rgba(255, 255, 255, 0.1);
  --good: #0ca30c;
  --bad: #e66767;
  --warn: #fab219;
  --warn-mark: #fab219;
  --tv_S: #3987e5;
  --ooh_S: #d95926;
  --print_S: #199e70;
  --facebook_S: #c98500;
  --search_S: #d55181;
  --accent: #3987e5;
  --model-1: #3987e5;
  --model-2: #d95926;
  --selection: rgba(57, 135, 229, 0.32);
  --shadow: 0 0 0 1px var(--border), 0 16px 40px -20px rgba(0, 0, 0, 0.7);
}

/* Base */

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 72px;
  scrollbar-color: var(--axis) var(--page);
  accent-color: var(--accent);
}

body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.55;
  caret-color: var(--accent);
  -webkit-font-smoothing: antialiased;
  transition:
    background-color 240ms var(--ease-swift),
    color 240ms var(--ease-swift);
}

::selection {
  background: var(--selection);
  color: var(--ink);
}

h1,
h2,
h3 {
  text-wrap: balance;
  margin: 0;
}

p,
li {
  text-wrap: pretty;
}

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover {
  text-decoration-thickness: 2px;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

/* Barra superior */

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 12px max(24px, calc((100% - 1072px) / 2));
  background: color-mix(in srgb, var(--page) 86%, transparent);
  box-shadow: 0 1px 0 color-mix(in srgb, var(--grid) 70%, transparent);
  backdrop-filter: saturate(140%) blur(10px);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
}

.brand {
  color: var(--ink);
  font-weight: 600;
  text-decoration: none;
}

.topnav {
  display: flex;
  gap: 4px;
  margin-left: auto;
}

.topnav a {
  padding: 8px 10px;
  border-radius: var(--radius-control);
  color: var(--ink-2);
  font-size: 15px;
  text-decoration: none;
  transition:
    background-color 160ms var(--ease-swift),
    color 160ms var(--ease-swift);
}

.topnav a:hover {
  color: var(--ink);
  background: var(--grid);
}

main,
footer {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Botones */

button {
  font: inherit;
  font-size: 15px;
  min-height: 40px;
  padding: 8px 14px;
  border-radius: var(--radius-control);
  border: 0;
  background: var(--surface);
  color: var(--ink);
  box-shadow: 0 0 0 1px var(--border);
  cursor: pointer;
  transition:
    background-color 160ms var(--ease-swift),
    color 160ms var(--ease-swift),
    box-shadow 160ms var(--ease-swift),
    transform 120ms var(--ease-swift);
}

button:hover {
  box-shadow: 0 0 0 1px var(--axis);
}

button:active {
  transform: scale(0.96);
}

button.ghost {
  background: transparent;
  color: var(--ink-2);
  box-shadow: none;
}

button.ghost:hover {
  background: var(--grid);
  color: var(--ink);
}

/* Inicio */

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  gap: 48px;
  align-items: end;
  padding: 40px 0 56px;
}

.notice {
  display: inline-block;
  margin: 0 0 20px;
  padding: 4px 12px;
  border-radius: 999px;
  box-shadow: 0 0 0 1px var(--border);
  color: var(--ink-2);
  font-size: 13px;
}

h1 {
  font-size: clamp(34px, 4.4vw, 54px);
  line-height: 1.06;
  letter-spacing: -0.025em;
  max-width: 17ch;
}

.answer {
  margin: 20px 0 0;
  max-width: 52ch;
  color: var(--ink-2);
  font-size: 19px;
}

.hero-result {
  padding: 28px;
  border-radius: var(--radius-card);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.result-value {
  margin: 0;
  font-size: clamp(56px, 7vw, 84px);
  font-weight: 650;
  line-height: 1;
  letter-spacing: -0.035em;
  font-variant-numeric: tabular-nums;
}

.result-label {
  margin: 8px 0 20px;
  color: var(--ink-2);
}

.result-facts {
  margin: 0 0 20px;
  padding-top: 8px;
  border-top: 1px solid var(--grid);
}

.result-facts div {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 8px 0;
}

.result-facts div + div {
  border-top: 1px solid color-mix(in srgb, var(--grid) 60%, transparent);
}

.result-facts dt {
  color: var(--ink-2);
  font-size: 15px;
}

.result-facts dd {
  margin: 0;
  font-weight: 600;
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}

.result-link {
  font-size: 15px;
}

/* Bloques */

.block {
  padding: 56px 0;
  border-top: 1px solid var(--grid);
}

.block-head {
  margin-bottom: 24px;
}

h2 {
  font-size: 28px;
  letter-spacing: -0.015em;
}

.block-head p {
  margin: 6px 0 0;
  max-width: 65ch;
  color: var(--ink-2);
}

h3 {
  font-size: 18px;
}

.footnote {
  margin: 16px 0 0;
  max-width: 78ch;
  color: var(--muted);
  font-size: 14px;
}

/* Simulador */

.sim {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
  border-radius: var(--radius-card);
  background: var(--surface);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.sim-controls {
  display: flex;
  flex-direction: column;
  padding: 24px;
}

.sliders {
  display: flex;
  flex: 1;
  flex-direction: column;
  justify-content: space-evenly;
}

.sim-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}

.segmented {
  position: relative;
  display: inline-grid;
  grid-auto-flow: column;
  grid-auto-columns: 1fr;
  padding: 3px;
  border-radius: 11px;
  background: var(--page);
  box-shadow: inset 0 0 0 1px var(--border);
}

.segmented button {
  position: relative;
  z-index: 1;
  min-height: 36px;
  padding: 6px 14px;
  border-radius: 8px;
  background: transparent;
  box-shadow: none;
  color: var(--ink-2);
  white-space: nowrap;
}

.segmented button[aria-pressed="true"] {
  color: var(--ink);
}

.segmented-indicator {
  position: absolute;
  top: 3px;
  bottom: 3px;
  left: 0;
  width: var(--w, 0);
  border-radius: 8px;
  background: var(--surface);
  box-shadow:
    0 0 0 1px var(--border),
    0 1px 3px rgba(11, 11, 11, 0.08);
  transform: translateX(var(--x, 0));
  opacity: var(--o, 0);
  transition:
    transform 320ms var(--ease-out),
    width 320ms var(--ease-out),
    opacity 200ms var(--ease-swift);
}

.sim-total {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 0;
  color: var(--ink-2);
  font-size: 15px;
}

.sim-total strong {
  color: var(--ink);
  font-size: 20px;
  font-variant-numeric: tabular-nums;
}

.slider-row {
  display: grid;
  grid-template-columns: 112px minmax(0, 1fr) 84px;
  align-items: center;
  gap: 16px;
  padding: 6px 0;
}

.slider-row label {
  display: flex;
  align-items: center;
  gap: 8px;
}

.slider-row output {
  text-align: right;
  font-variant-numeric: tabular-nums;
  transition: color 160ms var(--ease-swift);
}

.slider-row.is-out output {
  color: var(--warn);
}

.swatch {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex: none;
}

/* Barra deslizante con relleno del color del canal y marca del máximo visto. */
.range {
  position: relative;
  --thumb: 18px;
}

.range input {
  display: block;
  width: 100%;
  height: 32px;
  margin: 0;
  background: transparent;
  appearance: none;
  -webkit-appearance: none;
  cursor: pointer;
}

.range input::-webkit-slider-runnable-track {
  height: 6px;
  border-radius: 999px;
  background: linear-gradient(
    to right,
    var(--fill-color) 0 var(--fill, 0%),
    var(--grid) var(--fill, 0%) 100%
  );
}

.range input::-moz-range-track {
  height: 6px;
  border-radius: 999px;
  background: var(--grid);
}

.range input::-moz-range-progress {
  height: 6px;
  border-radius: 999px;
  background: var(--fill-color);
}

.range input::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: var(--thumb);
  height: var(--thumb);
  margin-top: -6px;
  border-radius: 50%;
  background: var(--surface);
  box-shadow:
    0 0 0 1px var(--axis),
    0 1px 3px rgba(11, 11, 11, 0.2);
  transition:
    box-shadow 160ms var(--ease-swift),
    transform 120ms var(--ease-swift);
}

.range input::-moz-range-thumb {
  width: var(--thumb);
  height: var(--thumb);
  border: 0;
  border-radius: 50%;
  background: var(--surface);
  box-shadow:
    0 0 0 1px var(--axis),
    0 1px 3px rgba(11, 11, 11, 0.2);
}

.range input:hover::-webkit-slider-thumb {
  transform: scale(1.1);
}

.range input:active::-webkit-slider-thumb {
  transform: scale(1.18);
}

.range input:focus-visible {
  outline: none;
}

.range input:focus-visible::-webkit-slider-thumb {
  box-shadow:
    0 0 0 2px var(--surface),
    0 0 0 4px var(--accent);
}

.range input:focus-visible::-moz-range-thumb {
  box-shadow:
    0 0 0 2px var(--surface),
    0 0 0 4px var(--accent);
}

.slider-row.is-out .range input::-webkit-slider-thumb {
  box-shadow:
    0 0 0 2px var(--warn-mark),
    0 1px 3px rgba(11, 11, 11, 0.2);
}

.slider-row.is-out .range input::-moz-range-thumb {
  box-shadow: 0 0 0 2px var(--warn-mark);
}

.max-tick {
  position: absolute;
  top: 50%;
  left: calc(var(--thumb) / 2 + (100% - var(--thumb)) * var(--max, 0.66));
  width: 2px;
  height: 14px;
  margin: -7px 0 0 -1px;
  border-radius: 1px;
  background: var(--ink-2);
  opacity: 0.45;
  pointer-events: none;
}

.sim-warn {
  min-height: 1.5em;
  margin: 8px 0 0;
  color: var(--warn);
  font-size: 14px;
  opacity: 0;
  transform: translateY(-4px);
  transition:
    opacity 200ms var(--ease-swift),
    transform 200ms var(--ease-swift);
}

.sim-warn.is-visible {
  opacity: 1;
  transform: none;
}

.sim-results {
  display: grid;
  align-content: center;
  padding: 8px 28px;
  background: color-mix(in srgb, var(--page) 55%, var(--surface));
  box-shadow: inset 1px 0 0 var(--grid);
}

.metric {
  display: grid;
  gap: 2px;
  padding: 18px 0;
}

.metric + .metric {
  border-top: 1px solid var(--grid);
}

.metric-label,
.metric-range {
  color: var(--ink-2);
  font-size: 14px;
}

.metric-range {
  font-variant-numeric: tabular-nums;
}

.metric-value {
  font-size: 30px;
  font-weight: 650;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  transition: color 240ms var(--ease-swift);
}

.metric-value.delta-up {
  color: var(--good);
}

.metric-value.delta-down {
  color: var(--bad);
}

/* Evidencia: pestañas */

.tabs-wrap {
  margin-bottom: 16px;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.tabs {
  position: relative;
  display: inline-flex;
  gap: 2px;
  padding: 3px;
  border-radius: 11px;
  background: color-mix(in srgb, var(--grid) 55%, var(--page));
}

.tabs button[role="tab"] {
  position: relative;
  z-index: 1;
  min-height: 36px;
  padding: 6px 14px;
  border-radius: 8px;
  background: transparent;
  box-shadow: none;
  color: var(--ink-2);
  white-space: nowrap;
}

.tabs button[role="tab"]:hover {
  color: var(--ink);
}

.tabs button[aria-selected="true"] {
  color: var(--ink);
}

.tab-indicator {
  position: absolute;
  top: 3px;
  bottom: 3px;
  left: 0;
  width: var(--w, 0);
  border-radius: 8px;
  background: var(--surface);
  box-shadow:
    0 0 0 1px var(--border),
    0 1px 3px rgba(11, 11, 11, 0.08);
  transform: translateX(var(--x, 0));
  transition:
    transform 320ms var(--ease-out),
    width 320ms var(--ease-out);
}

.panels {
  border-radius: var(--radius-card);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.panel {
  margin: 0;
  padding: 24px;
  min-height: 460px;
}

.panel:focus-visible {
  outline-offset: -2px;
  border-radius: var(--radius-card);
}

.panel figcaption p {
  margin: 4px 0 12px;
  max-width: 72ch;
  color: var(--ink-2);
  font-size: 15px;
}

.panel.is-entering {
  animation: panel-in 260ms var(--ease-out) both;
}

@keyframes panel-in {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
}

.plot {
  min-height: 280px;
}

.plot svg {
  display: block;
  overflow: visible;
  max-width: 100%;
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
  margin-bottom: 8px;
  color: var(--ink-2);
  font-size: 14px;
}

.legend span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.legend .line-key {
  width: 14px;
  height: 2px;
  border-radius: 1px;
}

.multiples {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 24px;
}

.multiples h4 {
  display: flex;
  align-items: center;
  gap: 6px;
  margin: 0 0 4px;
  font-size: 14px;
  font-weight: 600;
}

/* Tabla desplegable: la altura se anima con grid-template-rows. */
.table-block {
  margin-top: 12px;
}

.table-toggle {
  min-height: 36px;
  padding: 4px 10px;
  margin-left: -10px;
  font-size: 14px;
}

.table-wrap {
  display: grid;
  grid-template-rows: 0fr;
  opacity: 0;
  transition:
    grid-template-rows 320ms var(--ease-out),
    opacity 200ms var(--ease-swift);
}

.table-wrap.is-open {
  grid-template-rows: 1fr;
  opacity: 1;
}

.table-inner {
  min-height: 0;
  max-height: 340px;
  overflow: auto;
}

table {
  border-collapse: collapse;
  margin-top: 8px;
  font-size: 14px;
  font-variant-numeric: tabular-nums;
}

th,
td {
  text-align: right;
  padding: 6px 12px;
  border-bottom: 1px solid var(--grid);
}

th:first-child,
td:first-child {
  text-align: left;
}

th {
  position: sticky;
  top: 0;
  background: var(--surface);
  color: var(--ink-2);
  font-weight: 600;
}

/* Método */

.method {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
  gap: 48px;
  align-items: start;
}

.method-copy p,
.method-copy li {
  max-width: 62ch;
  color: var(--ink-2);
}

.method-copy p {
  margin: 12px 0 0;
}

.method-copy ul {
  margin: 12px 0 0;
  padding-left: 20px;
}

.method-copy li + li {
  margin-top: 6px;
}

.checks {
  padding: 24px;
  border-radius: var(--radius-card);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.check-list {
  margin: 12px 0 16px;
}

.check-list div {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 2px 16px;
  padding: 12px 0;
}

.check-list div + div {
  border-top: 1px solid var(--grid);
}

.check-list dt {
  font-size: 15px;
}

.check-list dd {
  margin: 0;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  text-align: right;
}

.check-list .rule {
  grid-column: 1 / -1;
  text-align: left;
  color: var(--muted);
  font-size: 13px;
}

.check-list .pass {
  color: var(--good);
}

/* Pie */

footer {
  padding-top: 24px;
  padding-bottom: 48px;
  border-top: 1px solid var(--grid);
  color: var(--ink-2);
  font-size: 14px;
}

/* El único momento animado al cargar: el inicio aparece por partes. */
@media (prefers-reduced-motion: no-preference) {
  .reveal {
    animation: rise 700ms var(--ease-out) both;
    animation-delay: calc(var(--i, 0) * 90ms);
  }

  @keyframes rise {
    from {
      opacity: 0;
      transform: translateY(12px);
      filter: blur(4px);
    }
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 1ms !important;
    transition-duration: 1ms !important;
  }
}

/* Pantallas medianas y chicas */

@media (max-width: 960px) {
  .hero,
  .method {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .hero {
    padding: 28px 0 40px;
  }

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

  .sim-results {
    box-shadow: inset 0 1px 0 var(--grid);
  }
}

@media (max-width: 640px) {
  main,
  footer {
    padding: 0 16px;
  }

  .topbar {
    padding: 10px 16px;
    gap: 12px;
  }

  .topnav {
    display: none;
  }

  #theme-toggle {
    margin-left: auto;
  }

  .block {
    padding: 40px 0;
  }

  .answer {
    font-size: 17px;
  }

  .hero-result,
  .sim-controls,
  .panel,
  .checks {
    padding: 18px;
  }

  .sim-results {
    padding: 4px 18px;
  }

  .slider-row {
    grid-template-columns: 1fr auto;
    gap: 0 12px;
  }

  .slider-row .range {
    grid-column: 1 / -1;
    grid-row: 2;
  }

  .panel {
    min-height: 0;
  }

  .metric-value {
    font-size: 26px;
  }
}