/* Layout: herramienta de dos columnas — parámetros a la izquierda, resultado y gráfico a la derecha; una columna en móvil */
:root {
  --bg: #f5f7fa;
  --surface: #ffffff;
  --ink: #12192b;
  --muted: #5b6478;
  --line: #dde2ea;
  --accent: #1d4ed8;      /* fondo con diferimiento */
  --accent-soft: rgba(29,78,216,.10);
  --amber: #b45309;       /* tributación anual */
  --base: #8a93a6;        /* lo aportado */
  --good: #15803d;
  --f-display: "Schibsted Grotesk", "Helvetica Neue", Arial, sans-serif;
  --f-body: "Schibsted Grotesk", "Helvetica Neue", Arial, sans-serif;
  --f-num: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0d121c; --surface: #151c2a; --ink: #e8ecf4; --muted: #9aa3b5; --line: #263044;
    --accent: #6d9bff; --accent-soft: rgba(109,155,255,.14); --amber: #f0a64a; --base: #6b7488; --good: #4ade80;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0d121c; --surface: #151c2a; --ink: #e8ecf4; --muted: #9aa3b5; --line: #263044;
  --accent: #6d9bff; --accent-soft: rgba(109,155,255,.14); --amber: #f0a64a; --base: #6b7488; --good: #4ade80;
  color-scheme: dark;
}
* { box-sizing: border-box; }
body {
  background: var(--bg); color: var(--ink); font-family: var(--f-body); font-size: 15px; line-height: 1.5;
  padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px));
  padding-block: 32px 48px;
}
.wrap { max-width: 1100px; margin: 0 auto; display: flex; flex-direction: column; gap: 28px; }
header h1 { font-family: var(--f-display); font-weight: 800; font-size: clamp(1.7rem, 3.4vw, 2.5rem); letter-spacing: -.02em; line-height: 1.1; margin: 0 0 8px; text-wrap: balance; }
header p { margin: 0; color: var(--muted); max-width: 64ch; }
.eyebrow { font-size: .72rem; letter-spacing: .12em; text-transform: uppercase; color: var(--accent); font-weight: 700; margin-bottom: 10px; }

.grid { display: grid; grid-template-columns: minmax(260px, 330px) 1fr; gap: 24px; align-items: start; }
@media (max-width: 820px) { .grid { grid-template-columns: 1fr; } }

.panel { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 20px; min-width: 0; }
.panel h2 { font-size: .78rem; text-transform: uppercase; letter-spacing: .1em; color: var(--muted); margin: 0 0 14px; font-weight: 700; }

form { display: flex; flex-direction: column; gap: 14px; }
.field { display: flex; flex-direction: column; gap: 5px; }
.field label { font-size: .86rem; font-weight: 600; }
.field .hint { font-size: .76rem; color: var(--muted); }
.inp { display: flex; align-items: center; border: 1px solid var(--line); border-radius: 7px; background: var(--bg); }
.inp:focus-within { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.inp input { flex: 1; min-width: 0; border: 0; background: transparent; color: var(--ink); font-family: var(--f-num); font-size: .98rem; padding: 9px 10px; outline: none; }
.inp span { padding: 0 10px; color: var(--muted); font-family: var(--f-num); font-size: .85rem; }
.pair { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.err { color: #dc2626; font-size: .8rem; min-height: 1em; }

.results { display: flex; flex-direction: column; gap: 20px; min-width: 0; }
.headline { display: flex; flex-wrap: wrap; gap: 12px 32px; align-items: flex-end; }
.big .lab { font-size: .8rem; color: var(--muted); font-weight: 600; }
.big .val { font-family: var(--f-num); font-weight: 600; font-size: clamp(1.7rem, 4vw, 2.4rem); letter-spacing: -.02em; color: var(--accent); font-variant-numeric: tabular-nums; }
.big .sub { font-size: .82rem; color: var(--muted); font-family: var(--f-num); }
.delta { display: inline-flex; gap: 6px; align-items: center; background: var(--accent-soft); color: var(--ink); border-radius: 999px; padding: 6px 12px; font-size: .84rem; }
.delta b { font-family: var(--f-num); color: var(--good); }

.kpis { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
@media (max-width: 560px) { .kpis { grid-template-columns: repeat(2, minmax(0,1fr)); } }
.kpi { background: var(--surface); padding: 12px 14px; }
.kpi .l { font-size: .74rem; color: var(--muted); }
.kpi .v { font-family: var(--f-num); font-size: 1.02rem; font-weight: 600; font-variant-numeric: tabular-nums; }

.legend { display: flex; flex-wrap: wrap; gap: 6px 18px; font-size: .8rem; color: var(--muted); }
.legend i { display: inline-block; width: 14px; height: 3px; border-radius: 2px; vertical-align: middle; margin-right: 6px; }
.chart { width: 100%; overflow-x: auto; }
.chart svg { display: block; width: 100%; min-width: 480px; height: auto; }
.chart text { font-family: var(--f-num); font-size: 11px; fill: var(--muted); }

.tbl { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: .84rem; }
th, td { text-align: right; padding: 7px 10px; border-bottom: 1px solid var(--line); white-space: nowrap; font-variant-numeric: tabular-nums; }
th { font-weight: 600; color: var(--muted); font-size: .74rem; text-transform: uppercase; letter-spacing: .05em; }
td { font-family: var(--f-num); }
th:first-child, td:first-child { text-align: left; }

.notes { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
@media (max-width: 820px) { .notes { grid-template-columns: 1fr; } }
.notes h3 { font-size: 1rem; margin: 0 0 8px; }
.notes p, .notes li { color: var(--muted); font-size: .88rem; max-width: 65ch; }
.notes ul { padding-left: 18px; margin: 0; }
.scale { font-family: var(--f-num); font-size: .82rem; }
.scale td, .scale th { padding: 5px 8px; }
footer { color: var(--muted); font-size: .76rem; border-top: 1px solid var(--line); padding-top: 14px; }
@media (prefers-reduced-motion: no-preference) { .line { transition: d .25s ease; } }

.site-nav { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 10px 20px; padding-bottom: 14px; border-bottom: 1px solid var(--line); }
.brand { font-family: var(--f-display); font-weight: 800; font-size: 1.15rem; letter-spacing: -.02em; color: var(--ink); text-decoration: none; }
.brand span { color: var(--accent); }
.site-nav ul { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 6px 18px; }
.site-nav a.l { color: var(--muted); text-decoration: none; font-size: .88rem; font-weight: 600; }
.site-nav a.l:hover, .site-nav a.l[aria-current] { color: var(--accent); }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 3px; }