/* Macroeconomía Avanzada: interactive labs.
   Grayscale, like jorgealonsoortiz.work: ink, one muted grey, hairlines.
   Series are told apart by dash pattern and direct labels, never by colour alone. */

:root {
  --bg: #ffffff;
  --panel: #f4f4f4;
  --ink: #111111;
  --text: #222222;
  --muted: #555555;
  --faint: #8a8a8a;
  --rule: #dddddd;
  --grid: #ececec;
  --band: rgba(17, 17, 17, 0.07);
  --s1: #111111;      /* series 1: solid */
  --s2: #666666;      /* series 2: dashed */
  --s3: #9a9a9a;      /* series 3: dotted */
  --s4: #3a3a3a;      /* series 4: dash-dot */
  --code-bg: #161616;
  --code-fg: #e8e8e8;
  --focus: #111111;
  --tip-bg: #111111;
  --tip-fg: #fafafa;
  --radius: 3px;
  --maxw: 1180px;
  --font: "Manrope", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #1e2327; --panel: #252b31; --ink: #f2f2f2; --text: #e6e6e6; --muted: #b8c1cc; --faint: #8b95a1;
    --rule: #3a444e; --grid: #2c343b; --band: rgba(242, 242, 242, 0.08);
    --s1: #f2f2f2; --s2: #a9b1ba; --s3: #7d8791; --s4: #d0d6dc;
    --code-bg: #14181b; --code-fg: #e8e8e8; --focus: #f2f2f2; --tip-bg: #f2f2f2; --tip-fg: #111111;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #1e2327; --panel: #252b31; --ink: #f2f2f2; --text: #e6e6e6; --muted: #b8c1cc; --faint: #8b95a1;
  --rule: #3a444e; --grid: #2c343b; --band: rgba(242, 242, 242, 0.08);
  --s1: #f2f2f2; --s2: #a9b1ba; --s3: #7d8791; --s4: #d0d6dc;
  --code-bg: #14181b; --code-fg: #e8e8e8; --focus: #f2f2f2; --tip-bg: #f2f2f2; --tip-fg: #111111;
  color-scheme: dark;
}

/* ---------------------------------------------------------------- language */
html[data-lang="es"] .en, html[data-lang="en"] .es { display: none !important; }

/* ---------------------------------------------------------------- base */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 400 16px/1.6 var(--font);
}
a { color: inherit; text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; }
h1, h2, h3 { color: var(--ink); line-height: 1.15; letter-spacing: -0.015em; margin: 0 0 .4em; }
h1 { font-size: clamp(2rem, 4.4vw, 3rem); font-weight: 700; }
h2 { font-size: clamp(1.4rem, 2.6vw, 1.85rem); font-weight: 700; }
h3 { font-size: 1.1rem; font-weight: 700; }
p { margin: 0 0 1em; }
code { font-family: var(--mono); font-size: .92em; }
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.kicker { font-size: 12px; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); font-weight: 600; margin: 0 0 .6em; }
.lead { font-size: 1.15rem; color: var(--muted); max-width: 62ch; }
.small { font-size: .88rem; color: var(--muted); }
.muted { color: var(--muted); }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); border: 0; }

/* ---------------------------------------------------------------- top bar */
.topbar { border-bottom: 1px solid var(--rule); background: var(--bg); position: sticky; top: 0; z-index: 20; }
.topbar .wrap { display: flex; align-items: center; gap: 16px; min-height: 56px; }
.brand { font-weight: 700; color: var(--ink); text-decoration: none; letter-spacing: -0.01em; }
.brand span { color: var(--muted); font-weight: 500; }
.topnav { display: flex; gap: 18px; margin-left: auto; align-items: center; font-size: .92rem; }
.topnav a { text-decoration: none; color: var(--muted); }
.topnav a:hover, .topnav a[aria-current="page"] { color: var(--ink); text-decoration: underline; }
.lang-toggle { display: inline-flex; border: 1px solid var(--rule); border-radius: 999px; overflow: hidden; }
.lang-toggle button {
  font: 600 12px/1 var(--font); letter-spacing: .06em; padding: 7px 11px; border: 0; cursor: pointer;
  background: transparent; color: var(--muted);
}
.lang-toggle button[aria-pressed="true"] { background: var(--ink); color: var(--bg); }
@media (max-width: 720px) { .topnav .hide-sm { display: none; } }

/* ---------------------------------------------------------------- page sections */
.hero { padding-top: 64px; padding-bottom: 36px; }   /* vertical only: .wrap owns the side gutter */
.band { background: var(--panel); }
.section { padding-top: 48px; padding-bottom: 48px; }
.rule-top { border-top: 1px solid var(--rule); }
.footer { padding: 40px 0 56px; border-top: 1px solid var(--rule); font-size: .88rem; color: var(--muted); }

/* ---------------------------------------------------------------- lab layout */
.lab { display: grid; grid-template-columns: 300px minmax(0, 1fr); gap: 36px; align-items: start; }
.controls { position: sticky; top: 76px; background: var(--panel); border-radius: var(--radius); padding: 20px; }
.controls h2 { font-size: .8rem; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); margin-bottom: 14px; }
.charts { display: grid; gap: 28px; }
@media (max-width: 900px) {
  .lab { grid-template-columns: 1fr; }
  .controls { position: static; }
}

.ctl { margin: 0 0 16px; }
.ctl-head { display: flex; justify-content: space-between; gap: 8px; font-size: .9rem; color: var(--text); margin-bottom: 4px; }
.ctl-head output { font-variant-numeric: tabular-nums; font-weight: 700; color: var(--ink); }
.ctl-note { font-size: .78rem; color: var(--muted); margin-top: 2px; }
input[type="range"] { width: 100%; accent-color: var(--ink); margin: 4px 0; }
select, .btn {
  font: 500 .9rem/1.2 var(--font); color: var(--ink); background: var(--bg);
  border: 1px solid var(--rule); border-radius: var(--radius); padding: 8px 10px;
}
select { width: 100%; }
.btn { cursor: pointer; display: inline-flex; gap: 6px; align-items: center; text-decoration: none; }
.btn:hover { border-color: var(--ink); }
.btn-primary { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.btn-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; }
.seg { display: flex; border: 1px solid var(--rule); border-radius: var(--radius); overflow: hidden; }
.seg button { flex: 1; font: 500 .85rem/1 var(--font); padding: 8px 6px; border: 0; background: var(--bg); color: var(--muted); cursor: pointer; }
.seg button + button { border-left: 1px solid var(--rule); }
.seg button[aria-pressed="true"] { background: var(--ink); color: var(--bg); }
.check { display: flex; gap: 8px; align-items: center; font-size: .9rem; margin: 6px 0; }
.check input { accent-color: var(--ink); }

/* ---------------------------------------------------------------- stat tiles */
.tiles { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; }
.tile { border-top: 1px solid var(--ink); padding-top: 8px; }
.tile .label { font-size: .8rem; color: var(--muted); }
.tile .value { font-size: 1.7rem; font-weight: 700; color: var(--ink); letter-spacing: -0.02em; line-height: 1.2; }
.tile .note { font-size: .78rem; color: var(--muted); }

/* ---------------------------------------------------------------- charts */
.chart-card { min-width: 0; }
.chart-head { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; flex-wrap: wrap; }
.chart-title { font-weight: 700; color: var(--ink); font-size: 1rem; margin: 0; }
.chart-sub { font-size: .85rem; color: var(--muted); margin: 2px 0 6px; }
.chart-tools { display: flex; gap: 6px; }
.chart-tools button {
  font: 500 .75rem/1 var(--font); color: var(--muted); background: transparent; border: 1px solid var(--rule);
  border-radius: 999px; padding: 5px 10px; cursor: pointer;
}
.chart-tools button:hover { color: var(--ink); border-color: var(--ink); }
.legend { display: flex; flex-wrap: wrap; gap: 4px 16px; font-size: .82rem; color: var(--text); margin: 4px 0 2px; }
.legend .key { display: inline-flex; align-items: center; gap: 6px; }
.legend svg { overflow: visible; }
.chart { position: relative; width: 100%; }
.chart svg { display: block; width: 100%; height: auto; overflow: visible; }
.chart .axis text { fill: var(--muted); font: 12px var(--font); font-variant-numeric: tabular-nums; }
.chart .axis path, .chart .axis line { stroke: var(--rule); }
.chart .grid line { stroke: var(--grid); }
.chart .grid path { display: none; }
.chart .zero { stroke: var(--muted); stroke-width: 1; }
.chart .series { fill: none; stroke-width: 2; stroke-linejoin: round; stroke-linecap: round; }
.chart .area { stroke: none; }
.chart .shade { fill: var(--band); }
.chart .dlabel { fill: var(--text); font: 600 12px var(--font); paint-order: stroke; stroke: var(--bg); stroke-width: 4px; }
.chart .alabel { fill: var(--muted); font: 12px var(--font); paint-order: stroke; stroke: var(--bg); stroke-width: 4px; }
.chart .axis-title { fill: var(--muted); font: 12px var(--font); }
.chart .xhair { stroke: var(--muted); stroke-width: 1; }
.chart .dot { stroke: var(--bg); stroke-width: 2; }
.tooltip {
  position: absolute; pointer-events: none; z-index: 5; min-width: 140px;
  background: var(--tip-bg); color: var(--tip-fg); border-radius: var(--radius); padding: 8px 10px;
  font-size: .8rem; line-height: 1.35; box-shadow: 0 2px 10px rgba(0,0,0,.18);
  opacity: 0; transform: translateY(4px); transition: opacity .08s, transform .08s;
}
.tooltip.on { opacity: 1; transform: none; }
.tooltip .t-head { opacity: .75; margin-bottom: 4px; }
.tooltip .t-row { display: grid; grid-template-columns: 18px auto 1fr; gap: 6px; align-items: center; }
.tooltip .t-row b { font-variant-numeric: tabular-nums; }
.tooltip .t-row span:last-child { opacity: .8; }
.table-view { display: none; max-height: 320px; overflow: auto; border: 1px solid var(--rule); border-radius: var(--radius); margin-top: 8px; }
.table-view.on { display: block; }
.table-view table { border-collapse: collapse; width: 100%; font-size: .82rem; font-variant-numeric: tabular-nums; }
.table-view th, .table-view td { padding: 4px 10px; text-align: right; border-bottom: 1px solid var(--grid); white-space: nowrap; }
.table-view th:first-child, .table-view td:first-child { text-align: left; }
.table-view thead th { position: sticky; top: 0; background: var(--panel); color: var(--ink); }

/* ---------------------------------------------------------------- prose blocks */
.notice { border-left: 2px solid var(--ink); padding: 2px 0 2px 16px; margin: 0 0 16px; }
.try { counter-reset: t; list-style: none; padding: 0; margin: 0; display: grid; gap: 14px; }
.try li { counter-increment: t; display: grid; grid-template-columns: 28px 1fr; gap: 10px; }
.try li::before {
  content: counter(t); width: 24px; height: 24px; border-radius: 50%; border: 1px solid var(--ink);
  display: grid; place-items: center; font-size: .78rem; font-weight: 700; color: var(--ink);
}
details.math { border-top: 1px solid var(--rule); padding: 14px 0; }
details.math summary { cursor: pointer; font-weight: 700; color: var(--ink); }
details.math .katex-display { overflow-x: auto; overflow-y: hidden; padding: 4px 0; }
.two { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 36px; }
.two > * { min-width: 0; }
@media (max-width: 800px) { .two { grid-template-columns: minmax(0, 1fr); } }
.links { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.links a { font-weight: 600; }

/* ---------------------------------------------------------------- index cards */
.grid-cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(270px, 1fr)); gap: 16px; }
.card {
  display: flex; flex-direction: column; gap: 6px; text-decoration: none; background: var(--bg);
  border: 1px solid var(--rule); border-radius: var(--radius); padding: 18px 18px 16px; min-height: 190px;
}
.card:hover { border-color: var(--ink); }
.card .unit { font-size: 11px; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); font-weight: 600; }
.card h3 { margin: 0; }
.card p { margin: 0; font-size: .92rem; color: var(--muted); }
.card .go { margin-top: auto; font-weight: 600; font-size: .9rem; color: var(--ink); }
.card svg { display: block; width: 100%; height: 48px; margin: 4px 0; }
.card svg path { fill: none; stroke: var(--ink); stroke-width: 1.5; }
.card svg path.b { stroke: var(--faint); stroke-dasharray: 4 3; }

@media print {
  .topbar, .controls, .chart-tools { display: none; }
  .lab { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }