:root {
  --bg: #f4f6f9; --surface: #ffffff; --surface-2: #eef2f7; --ink: #142235; --ink-2: #4a5a70; --line: #d8e0ea;
  --brand: #0f2d52; --brand-2: #1d4f8c; --accent: #f2b632; --accent-ink: #3b2a00;
  --ok: #1f8a4c; --ok-bg: #e5f5ec; --obs: #a86a00; --obs-bg: #fff3d6; --cal: #c0392b; --cal-bg: #fde8e5; --info-bg: #e8f0fb;
  --s1: #1d6fd1; --s2: #d6452f; --s3: #2f9e6a; --s4: #8a63c9;
  --radius: 14px; --shadow: 0 1px 2px rgba(16, 32, 56, .06), 0 6px 24px rgba(16, 32, 56, .07);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0d1520; --surface: #142030; --surface-2: #1b2a3e; --ink: #e8eef6; --ink-2: #a7b6c9; --line: #2a3b52;
    --brand: #b9d3f5; --brand-2: #7fb0ec; --accent: #f2b632; --accent-ink: #2a1f00;
    --ok: #5fd197; --ok-bg: #12352a; --obs: #f2c25b; --obs-bg: #3a2d10; --cal: #ff8a7a; --cal-bg: #3d1a17; --info-bg: #162a44;
    --s1: #5aa2ff; --s2: #ff7b66; --s3: #5fd197; --s4: #b597f0; --shadow: 0 1px 2px rgba(0,0,0,.3), 0 8px 28px rgba(0,0,0,.35);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0d1520; --surface: #142030; --surface-2: #1b2a3e; --ink: #e8eef6; --ink-2: #a7b6c9; --line: #2a3b52;
  --brand: #b9d3f5; --brand-2: #7fb0ec; --accent: #f2b632; --accent-ink: #2a1f00;
  --ok: #5fd197; --ok-bg: #12352a; --obs: #f2c25b; --obs-bg: #3a2d10; --cal: #ff8a7a; --cal-bg: #3d1a17; --info-bg: #162a44;
  --s1: #5aa2ff; --s2: #ff7b66; --s3: #5fd197; --s4: #b597f0; --shadow: 0 1px 2px rgba(0,0,0,.3), 0 8px 28px rgba(0,0,0,.35);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; overflow-x: hidden; }
img { max-width: 100%; display: block; }
a { color: var(--brand-2); }
h1, h2, h3, h4 { line-height: 1.2; margin: 0 0 .5em; text-wrap: balance; }
h1 { font-size: clamp(1.6rem, 3.4vw, 2.4rem); letter-spacing: -.02em; }
h2 { font-size: 1.35rem; margin-top: 1.4em; }
h3 { font-size: 1.08rem; }
h4 { font-size: .95rem; margin-top: 1.1em; color: var(--ink-2); text-transform: uppercase; letter-spacing: .04em; font-size: .78rem; }
ul, ol { padding-left: 1.2em; margin: .3em 0 .8em; }
li { margin: .2em 0; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
.saltar { position: absolute; left: -999px; top: 8px; background: var(--accent); color: var(--accent-ink); padding: 8px 12px; border-radius: 8px; z-index: 10; }
.saltar:focus { left: 8px; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }

/* Cabecera */
body::before { content: ""; position: fixed; inset: 0 0 auto; height: env(safe-area-inset-top, 0px); z-index: 10; background: var(--surface); }
.top { position: sticky; top: env(safe-area-inset-top, 0px); z-index: 5; display: flex; align-items: center; gap: 16px; padding-block: 10px; padding-left: max(16px, env(safe-area-inset-left, 0px), calc((100vw - 1240px) / 2)); padding-right: max(16px, env(safe-area-inset-right, 0px), calc((100vw - 1240px) / 2)); background: color-mix(in srgb, var(--surface) 88%, transparent); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.marca { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--brand); }
.marca svg { width: 36px; height: 36px; color: #0f2d52; flex: none; }
.marca span { display: flex; flex-direction: column; line-height: 1.15; color: var(--ink); }
.marca small { color: var(--ink-2); font-size: .78rem; }
/* Logo institucional de Ingeniería Civil (Universidad de Pamplona); en tema oscuro va sobre una placa blanca para conservar sus colores. */
.marca .logo-ic { height: 40px; width: auto; flex: none; }
.marca .logo-ic + span { padding-left: 12px; border-left: 1px solid var(--line); }
:root[data-theme="dark"] .marca .logo-ic { background: #fff; border-radius: 6px; padding: 3px 5px; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .marca .logo-ic { background: #fff; border-radius: 6px; padding: 3px 5px; } }
@media (max-width: 420px) { .marca .logo-ic { height: 34px; } }
.nav { display: flex; gap: 4px; margin-left: auto; overflow-x: auto; }
.nav a { padding: 8px 12px; border-radius: 999px; text-decoration: none; color: var(--ink-2); font-weight: 600; font-size: .92rem; white-space: nowrap; }
.nav a:hover { background: var(--surface-2); color: var(--ink); }
.nav a.activo { background: var(--brand); color: var(--surface); }
.btn-icono { border: 1px solid var(--line); background: var(--surface); color: var(--ink); width: 38px; height: 38px; border-radius: 50%; cursor: pointer; font-size: 1.1rem; flex: none; }
@media (max-width: 720px) {
  .top { flex-wrap: wrap; }
  .marca small { display: none; }
  .nav { order: 3; width: 100%; margin: 0; }
  .btn-icono { margin-left: auto; }
}

main { max-width: 1240px; margin: 0 auto; padding-block: 24px 48px; padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px)); min-height: 70vh; }
.pie { border-top: 1px solid var(--line); color: var(--ink-2); font-size: .85rem; padding-block: 18px 32px; padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px)); text-align: center; }
.pie p { max-width: 900px; margin: 0 auto; }

/* Botones */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; min-height: 40px; padding: 8px 16px; border-radius: 10px; border: 1px solid var(--line); background: var(--surface); color: var(--ink); font: inherit; font-weight: 600; font-size: .92rem; cursor: pointer; text-decoration: none; }
.btn:hover { border-color: var(--brand-2); }
.btn:disabled { opacity: .45; cursor: default; }
.btn.sm { min-height: 34px; padding: 6px 12px; font-size: .85rem; }
.btn.primario { background: var(--brand); color: var(--surface); border-color: var(--brand); }
.btn.primario.on { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.btn[aria-pressed="true"] { background: var(--surface-2); border-color: var(--brand-2); }

/* Portada */
.hero { display: grid; grid-template-columns: 1.4fr 1fr; gap: 28px; align-items: center; margin-bottom: 28px; }
.eyebrow { color: var(--brand-2); font-weight: 700; font-size: .8rem; letter-spacing: .06em; text-transform: uppercase; margin: 0 0 .5em; }
.lead { color: var(--ink-2); font-size: 1.08rem; max-width: 62ch; }
.stats { display: flex; gap: 12px; margin-top: 18px; flex-wrap: wrap; }
.stats div { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 10px 16px; display: flex; flex-direction: column; min-width: 110px; }
.stats strong { font-size: 1.6rem; color: var(--brand); font-variant-numeric: tabular-nums; }
.stats span { color: var(--ink-2); font-size: .85rem; }
.hero-card { background: radial-gradient(circle at 50% 40%, var(--surface) 0%, var(--surface-2) 100%); border: 1px solid var(--line); border-radius: 20px; padding: 18px; text-decoration: none; color: var(--brand); font-weight: 700; display: flex; flex-direction: column; align-items: center; gap: 10px; box-shadow: var(--shadow); }
.hero-card img { max-height: 240px; object-fit: contain; }
@media (max-width: 820px) { .hero { grid-template-columns: 1fr; } .hero-card img { max-height: 180px; } }

.filtros { display: flex; flex-direction: column; gap: 10px; margin-bottom: 12px; }
.buscar input { width: 100%; padding: 12px 16px; border-radius: 12px; border: 1px solid var(--line); background: var(--surface); color: var(--ink); font: inherit; }
.chips { display: flex; gap: 8px; flex-wrap: wrap; }
.chip { border: 1px solid var(--line); background: var(--surface); color: var(--ink-2); border-radius: 999px; padding: 6px 14px; font: inherit; font-size: .88rem; font-weight: 600; cursor: pointer; }
.chip.on { background: var(--brand); color: var(--surface); border-color: var(--brand); }
.chip.est.on.ok { background: var(--ok); border-color: var(--ok); }
.chip.est.on.obs { background: var(--obs); border-color: var(--obs); }
.chip.est.on.cal { background: var(--cal); border-color: var(--cal); }
.conteo { color: var(--ink-2); font-size: .9rem; margin: 6px 0 12px; }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 16px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; text-decoration: none; color: inherit; display: flex; flex-direction: column; box-shadow: var(--shadow); transition: transform .15s, border-color .15s; }
.card:hover { transform: translateY(-2px); border-color: var(--brand-2); }
.card-img { position: relative; background: #fff; aspect-ratio: 4 / 3; display: grid; place-items: center; padding: 14px; }
.card-img img { max-height: 100%; object-fit: contain; }
.num { position: absolute; top: 10px; left: 10px; background: var(--brand); color: #fff; font-size: .72rem; font-weight: 700; padding: 3px 8px; border-radius: 6px; }
:root[data-theme="dark"] .num { background: #1d4f8c; }
.card-body { padding: 14px 16px 16px; display: flex; flex-direction: column; gap: 6px; flex: 1; }
.card-body h3 { margin: 0; }
.card-body p { margin: 0; color: var(--ink-2); font-size: .88rem; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.area { font-size: .75rem; font-weight: 700; color: var(--brand-2); text-transform: uppercase; letter-spacing: .05em; }
.card-foot { display: flex; justify-content: space-between; align-items: center; margin-top: auto; padding-top: 8px; gap: 8px; }
.ir { color: var(--brand-2); font-weight: 700; font-size: .85rem; white-space: nowrap; }
.badge { display: inline-block; font-size: .74rem; font-weight: 700; padding: 3px 9px; border-radius: 999px; }
.badge.ok { background: var(--ok-bg); color: var(--ok); }
.badge.obs { background: var(--obs-bg); color: var(--obs); }
.badge.cal { background: var(--cal-bg); color: var(--cal); }
.vacio { color: var(--ink-2); }

/* Detalle */
.migas { font-size: .88rem; color: var(--ink-2); margin-bottom: 12px; }
.migas span { margin: 0 4px; opacity: .6; }
.eq-head { display: grid; grid-template-columns: 96px 1fr auto; gap: 18px; align-items: center; margin-bottom: 16px; }
.eq-head > img { width: 96px; height: 96px; object-fit: contain; background: #fff; border-radius: 14px; border: 1px solid var(--line); padding: 6px; }
.eq-head h1 { margin-bottom: .15em; }
.sub { color: var(--ink-2); margin: 0 0 8px; }
.estado-linea { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; font-size: .9rem; color: var(--ink-2); }
.eq-nav { display: flex; gap: 8px; }
@media (max-width: 760px) { .eq-head { grid-template-columns: 64px 1fr; } .eq-head > img { width: 64px; height: 64px; } .eq-nav { grid-column: 1 / -1; } }
.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--line); margin-bottom: 18px; overflow-x: auto; }
.tab { padding: 10px 14px; text-decoration: none; color: var(--ink-2); font-weight: 600; border-bottom: 3px solid transparent; white-space: nowrap; }
.tab.on { color: var(--brand); border-color: var(--accent); }

.visor-wrap { display: grid; grid-template-columns: 1fr 320px; gap: 16px; }
.visor { position: relative; height: min(68vh, 620px); min-height: 380px; border-radius: 18px; overflow: hidden; border: 1px solid var(--line); background: radial-gradient(ellipse at 50% 30%, #ffffff 0%, #dfe7f1 70%, #cfd9e6 100%); }
:root[data-theme="dark"] .visor { background: radial-gradient(ellipse at 50% 30%, #2a3c55 0%, #142030 75%); }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .visor { background: radial-gradient(ellipse at 50% 30%, #2a3c55 0%, #142030 75%); } }
.visor canvas { width: 100% !important; height: 100% !important; display: block; touch-action: none; cursor: grab; }
.visor:fullscreen { border-radius: 0; height: 100vh; }
.cargando { position: absolute; inset: 0; display: grid; place-items: center; color: var(--ink-2); }
.visor-ayuda { position: absolute; left: 12px; bottom: 10px; font-size: .78rem; color: #4a5a70; background: rgba(255,255,255,.75); padding: 4px 10px; border-radius: 999px; pointer-events: none; }
.piezas { background: var(--surface); border: 1px solid var(--line); border-radius: 18px; padding: 16px; display: flex; flex-direction: column; gap: 10px; max-height: min(68vh, 620px); overflow: auto; }
.piezas > * { flex-shrink: 0; }
.piezas h4 { margin: 4px 0 0; }
.ctrl { display: flex; flex-direction: column; gap: 10px; }
.ctrl .primario { width: 100%; }
.slider { display: flex; flex-direction: column; gap: 4px; font-size: .85rem; color: var(--ink-2); font-weight: 600; }
.slider input { width: 100%; accent-color: var(--brand-2); }
.fila-btn { display: flex; flex-wrap: wrap; gap: 6px; }
.info-pieza { background: var(--surface-2); border-radius: 12px; padding: 12px; min-height: 90px; }
.info-pieza h3 { color: var(--brand); margin-bottom: .3em; }
.info-pieza p { margin: 0; font-size: .92rem; }
.lista-piezas { display: flex; flex-wrap: wrap; gap: 6px; }
.lista-piezas button { border: 1px solid var(--line); background: var(--surface); color: var(--ink); border-radius: 999px; padding: 5px 11px; font: inherit; font-size: .82rem; cursor: pointer; }
.lista-piezas button.on { background: var(--brand-2); color: #fff; border-color: var(--brand-2); }
.disclaimer { font-size: .78rem; margin-top: auto; }
@media (max-width: 900px) { .visor-wrap { grid-template-columns: 1fr; } .visor { height: 56vh; min-height: 320px; } .piezas { max-height: none; } }

.nota { color: var(--ink-2); font-size: .88rem; }
.ficha { display: grid; grid-template-columns: 300px 1fr; gap: 24px; align-items: start; }
.foto { margin: 0; position: sticky; top: 80px; display: flex; flex-direction: column; gap: 10px; }
.zoom { background: #fff; border: 1px solid var(--line); border-radius: 16px; padding: 12px; cursor: zoom-in; }
.foto figcaption { font-size: .82rem; color: var(--ink-2); }
.secciones section { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 18px; margin-bottom: 14px; }
.secciones h3 { color: var(--brand); }
.ident { display: grid; grid-template-columns: 140px 1fr; gap: 6px 14px; margin: 0; }
.ident dt { color: var(--ink-2); font-size: .85rem; font-weight: 600; }
.ident dd { margin: 0; }
.tres { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.sug { background: var(--info-bg); border-radius: 10px; padding: 10px 14px; font-size: .92rem; }
.sug h4 { margin-top: .2em; }
.normas { list-style: none; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.normas li span { color: var(--ink-2); }
.fuente { font-size: .85rem; color: var(--ink-2); margin-bottom: 0; }
.badge.info { background: var(--surface-2); color: var(--brand-2); }
@media (max-width: 860px) { .ficha { grid-template-columns: 1fr; } .foto { position: static; max-width: 360px; } .tres { grid-template-columns: 1fr; } .ident { grid-template-columns: 110px 1fr; } }

.seg { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 14px; }
.card-plana { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 18px; }
.card-plana h3 { color: var(--brand); }

.practica { display: grid; grid-template-columns: 1fr 280px; gap: 18px; }
.prac-main { background: var(--surface); border: 1px solid var(--line); border-radius: 18px; padding: 22px; display: flex; flex-direction: column; gap: 18px; min-height: 340px; }
.progreso { height: 8px; border-radius: 99px; background: var(--surface-2); overflow: hidden; }
.progreso div { height: 100%; background: linear-gradient(90deg, var(--brand-2), var(--accent)); transition: width .3s; }
.paso { flex: 1; }
.paso h2 { font-size: clamp(1.3rem, 2.6vw, 1.8rem); margin-top: .2em; }
.checks { display: flex; flex-direction: column; gap: 10px; }
.checks label { display: flex; gap: 10px; align-items: flex-start; background: var(--surface-2); padding: 10px 12px; border-radius: 10px; cursor: pointer; }
.checks input { width: 20px; height: 20px; margin-top: 2px; accent-color: var(--ok); flex: none; }
.checks input:checked + span { text-decoration: line-through; color: var(--ink-2); }
.prac-nav { display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.prac-side { background: var(--surface); border: 1px solid var(--line); border-radius: 18px; padding: 16px; display: flex; flex-direction: column; gap: 10px; align-self: start; }
.prac-side img { background: #fff; border-radius: 12px; padding: 8px; max-height: 220px; object-fit: contain; }
@media (max-width: 820px) { .practica { grid-template-columns: 1fr; } .prac-side { display: none; } }

/* Simuladores */
.sim > h2 { margin-top: 0; }
.sim h4 { margin-top: 1.4em; }
.campos { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 10px 14px; margin: 10px 0; }
.campo { display: flex; flex-direction: column; gap: 4px; font-size: .85rem; color: var(--ink-2); font-weight: 600; }
.campo .in { display: flex; align-items: center; border: 1px solid var(--line); border-radius: 10px; background: var(--surface); overflow: hidden; }
.campo .in:focus-within { border-color: var(--brand-2); }
.campo input, .campo select { flex: 1; min-width: 0; border: 0; background: transparent; color: var(--ink); font: inherit; font-weight: 500; padding: 9px 10px; font-variant-numeric: tabular-nums; }
.campo select { border: 1px solid var(--line); border-radius: 10px; background: var(--surface); }
.campo em { font-style: normal; color: var(--ink-2); padding: 0 10px; font-size: .82rem; white-space: nowrap; }
.tabla-wrap { overflow-x: auto; margin: 10px 0; }
.tabla-ed, .tabla-res { border-collapse: collapse; min-width: 100%; font-size: .9rem; background: var(--surface); border-radius: 12px; overflow: hidden; }
.tabla-ed th, .tabla-res th { text-align: left; background: var(--surface-2); color: var(--ink-2); font-size: .78rem; text-transform: uppercase; letter-spacing: .03em; padding: 8px 10px; }
.tabla-ed td, .tabla-res td { border-top: 1px solid var(--line); padding: 4px 6px; font-variant-numeric: tabular-nums; }
.tabla-res td { padding: 8px 10px; }
.tabla-ed input { width: 100%; min-width: 80px; border: 1px solid transparent; background: transparent; color: var(--ink); font: inherit; padding: 6px; border-radius: 6px; }
.tabla-ed input:focus { border-color: var(--brand-2); background: var(--surface-2); outline: none; }
.del { border: 0; background: none; color: var(--cal); font-size: 1.2rem; cursor: pointer; width: 32px; height: 32px; }
.resultados { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 10px; margin: 12px 0; }
.res { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 10px 12px; display: flex; flex-direction: column; gap: 2px; }
.res span { font-size: .8rem; color: var(--ink-2); }
.res strong { font-size: 1.15rem; font-variant-numeric: tabular-nums; }
.res.hl { border-color: var(--brand-2); background: var(--info-bg); }
.res.ok strong { color: var(--ok); }
.res.mal strong { color: var(--cal); }
.aviso { border-radius: 10px; padding: 10px 12px; font-size: .9rem; background: var(--info-bg); margin: 8px 0; }
.aviso.ok { background: var(--ok-bg); }
.aviso.warn { background: var(--obs-bg); }
.chart { width: 100%; max-width: 760px; height: auto; background: var(--surface); border: 1px solid var(--line); border-radius: 12px; margin: 10px 0; }
.chart .grid { stroke: var(--line); stroke-width: 1; }
.chart .frame { fill: none; stroke: var(--ink-2); stroke-opacity: .5; }
.chart .tick { fill: var(--ink-2); font-size: 11px; }
.chart .axis { fill: var(--ink); font-size: 12.5px; font-weight: 600; }
.chart .ln { fill: none; stroke-width: 2.4; stroke-linejoin: round; }
.chart .ln.dash { stroke-dasharray: 6 5; stroke-width: 1.8; }
.chart .s1 { stroke: var(--s1); fill: var(--s1); } .chart .ln.s1 { fill: none; }
.chart .s2 { stroke: var(--s2); fill: var(--s2); } .chart .ln.s2 { fill: none; }
.chart .s3 { stroke: var(--s3); fill: var(--s3); } .chart .ln.s3 { fill: none; }
.chart .s4 { stroke: var(--s4); fill: var(--s4); } .chart .ln.s4 { fill: none; }
.chart .pt { stroke: var(--surface); stroke-width: 1.5; }
.chart .mk { fill: var(--accent); stroke: var(--ink); stroke-width: 1.2; }
.chart .mkl { fill: var(--ink); font-size: 12px; font-weight: 700; paint-order: stroke; stroke: var(--surface); stroke-width: 3px; }
.chart .legend text { fill: var(--ink-2); font-size: 11.5px; }
.dos { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
@media (max-width: 900px) { .dos { grid-template-columns: 1fr; } }
.balanza-sim { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 14px; }
.display { font: 700 2rem/1 ui-monospace, Consolas, monospace; background: #0f1d14; color: #7dff8c; padding: 14px 18px; border-radius: 10px; min-width: 220px; text-align: right; }
.display.ol { color: #ff7b66; }
.botones { display: flex; flex-wrap: wrap; gap: 8px; }

/* Páginas */
.pagina h1 { margin-bottom: .2em; }
.grid-sims { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 14px; margin-top: 18px; }
.mini { display: flex; flex-direction: column; gap: 6px; }
.mini a { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); font-weight: 600; font-size: .92rem; padding: 4px; border-radius: 8px; }
.mini a:hover { background: var(--surface-2); }
.mini img { width: 40px; height: 40px; object-fit: contain; background: #fff; border-radius: 8px; padding: 2px; }
.kpis { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 12px; margin: 18px 0; }
.kpi { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 14px 16px; display: flex; flex-direction: column; border-left-width: 5px; }
.kpi strong { font-size: 2rem; font-variant-numeric: tabular-nums; }
.kpi span { color: var(--ink-2); font-size: .88rem; }
.kpi.ok { border-left-color: var(--ok); } .kpi.obs { border-left-color: var(--obs); } .kpi.cal { border-left-color: var(--cal); } .kpi.ret { border-left-color: var(--ink-2); }
.inv td:nth-child(3) { font-size: .82rem; color: var(--ink-2); }
.incons { list-style: none; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.incons li { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; }
.tag { display: inline-block; background: var(--surface-2); color: var(--brand-2); font-weight: 700; font-size: .78rem; padding: 2px 8px; border-radius: 6px; margin-right: 6px; }
.reto .pregunta { background: var(--surface); border: 1px solid var(--line); border-radius: 18px; padding: 22px; max-width: 760px; margin-top: 16px; }
.q-img { max-height: 280px; margin: 10px auto; background: #fff; border-radius: 12px; padding: 10px; object-fit: contain; }
.reto blockquote { margin: 10px 0; padding: 12px 16px; border-left: 4px solid var(--accent); background: var(--surface-2); border-radius: 8px; font-size: 1.05rem; }
.ops { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin: 14px 0; }
.op { text-align: left; padding: 12px 14px; border-radius: 12px; border: 1px solid var(--line); background: var(--surface); color: var(--ink); font: inherit; font-weight: 600; cursor: pointer; }
.op:hover:not([disabled]) { border-color: var(--brand-2); }
.op.bien { background: var(--ok-bg); border-color: var(--ok); }
.op.mal { background: var(--cal-bg); border-color: var(--cal); }
.fin { text-align: center; }
.fin h2 { font-size: 3rem; color: var(--brand); margin: 0; }
@media (max-width: 560px) { .ops { grid-template-columns: 1fr; } }

.lightbox { border: 0; border-radius: 16px; padding: 16px; background: #fff; max-width: min(92vw, 900px); }
.lightbox::backdrop { background: rgba(8, 16, 28, .7); }
.lightbox img { max-height: 78vh; margin: 0 auto 10px; }

@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }
@media print { .top, .pie, .btn, .tabs { display: none !important; } body { background: #fff; } }