/* Sitio público de Civil Core. Tokens del manual de marca (Branding/) y la dirección «Juego de planos» (DESIGN.md). */

@font-face { font-family: 'Archivo'; src: url('/fonts/archivo-latin-400-normal.woff2') format('woff2'); font-weight: 400; font-display: swap; }
@font-face { font-family: 'Archivo'; src: url('/fonts/archivo-latin-500-normal.woff2') format('woff2'); font-weight: 500; font-display: swap; }
@font-face { font-family: 'Archivo'; src: url('/fonts/archivo-latin-600-normal.woff2') format('woff2'); font-weight: 600; font-display: swap; }
@font-face { font-family: 'Archivo'; src: url('/fonts/archivo-latin-700-normal.woff2') format('woff2'); font-weight: 700; font-display: swap; }
@font-face { font-family: 'Michroma'; src: url('/fonts/michroma-latin-400.woff2') format('woff2'); font-weight: 400; font-display: swap; }

:root {
  color-scheme: light;
  --nucleo: #2b5876;
  --nucleo-deep: #234a64;
  --nucleo-ink: #1c3c51;
  --nucleo-wash: #eef3f7;
  --nucleo-200: #b9cddc;
  --nucleo-300: #8dadc4;
  --nucleo-900: #0e1f2a;
  --grafito: #24272d;
  --lamina: #ffffff;
  --c50: #f6f7f8;
  --c100: #eceef0;
  --c200: #dde0e4;
  --control: #858c95;
  --c600: #4a4f57;
  --draft: #4f5da8;
  --draft-muted: #eceefa;
  --frame: 1.5px solid var(--grafito);
  --hair: 1px solid var(--c200);
  --sans: Archivo, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --brand: Michroma, 'Arial Black', sans-serif;
  --gutter: max(16px, env(safe-area-inset-left, 0px));
  --sec: clamp(72px, 10vw, 128px);
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; scroll-padding-top: 80px; }
@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }
body { margin: 0; background: var(--lamina); color: var(--grafito); font: 400 1rem/1.6 var(--sans); font-variant-numeric: tabular-nums; -webkit-font-smoothing: antialiased; }
img, video, svg { display: block; max-width: 100%; height: auto; }
h1, h2, h3, p, dl, dd, ol, ul, figure, blockquote { margin: 0; }
h1, h2, h3 { font-weight: 600; text-wrap: balance; }
h2 { font-size: clamp(1.75rem, 3.4vw, 2.6rem); line-height: 1.1; letter-spacing: -0.03em; max-width: 22ch; }
h3 { font-size: 1.25rem; line-height: 1.25; letter-spacing: -0.015em; }
a { color: var(--nucleo); text-underline-offset: 3px; text-decoration-thickness: 1px; }
::selection { background: var(--nucleo-200); color: var(--nucleo-900); }
:focus-visible { outline: 2px solid var(--nucleo); outline-offset: 2px; }

.wrap { width: 100%; max-width: 1240px; margin-inline: auto; padding-inline: var(--gutter); }
.lead { font-size: clamp(1.05rem, 1.4vw, 1.2rem); line-height: 1.55; color: var(--c600); max-width: 60ch; }
.skip { position: absolute; left: 16px; top: -100px; z-index: 20; background: var(--lamina); padding: 10px 14px; border: var(--frame); }
.skip:focus { top: 12px; }

/* Botones: casi rectos, 44 px de toque; el primario es la única acción en Azul Núcleo. */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 44px; padding: 0 18px; border-radius: 4px; border: 1px solid transparent;
  font: 500 0.95rem/1 var(--sans); text-decoration: none; cursor: pointer; white-space: nowrap;
  transition: background-color 120ms ease-out, opacity 120ms ease-out, transform 100ms ease-out;
}
.btn:active { transform: scale(0.97); }
.btn svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linejoin: round; }
.btn.primary { background: var(--nucleo); color: #fff; }
.btn.primary:hover { opacity: 0.9; }
.btn.outline { background: var(--lamina); color: var(--grafito); border-color: var(--control); }
.btn.outline:hover, .btn.ghost:hover { background: var(--nucleo-wash); }
.btn.ghost { color: var(--grafito); }
.btn.lg { min-height: 52px; padding: 0 22px; font-size: 1rem; }
.btn.sm { min-height: 34px; padding: 0 12px; font-size: 0.85rem; }

/* Encabezado */
.top { position: sticky; top: 0; z-index: 10; background: var(--lamina); border-bottom: var(--frame); padding-top: env(safe-area-inset-top, 0px); }
.top-bar { display: flex; align-items: center; gap: 28px; min-height: 68px; }
.lockup { display: inline-flex; align-items: center; gap: 10px; color: var(--grafito); text-decoration: none; }
.lockup .iso { width: 30px; height: 30px; flex: none; }
.wordmark { white-space: nowrap; font: 400 13px/1 var(--brand); letter-spacing: 0.32em; text-transform: uppercase; }
.by { display: inline-flex; align-items: center; gap: 8px; margin-left: 4px; padding-left: 12px; border-left: var(--hair); font-size: 0.8rem; color: var(--c600); }
.by img { width: 92px; height: auto; box-sizing: content-box; padding: 5px 9px; border-radius: 4px; background: var(--c600); } /* placa gris medio: el logo de Nexera es plata claro y sobre blanco no se lee */
.top-nav { display: flex; gap: 26px; margin-left: auto; }
.top-nav a { color: var(--c600); text-decoration: none; font-size: 0.95rem; padding-block: 8px; }
.top-nav a:hover { color: var(--grafito); }
.top-actions { display: flex; gap: 6px; }
@media (max-width: 1020px) { .top-nav { display: none; } .top-actions { margin-left: auto; } }
@media (max-width: 640px) {
  .top-actions .primary { display: none; }
  .top-actions .ghost { padding-inline: 10px; }
  .by { gap: 6px; padding-left: 10px; margin-left: 0; }
  .by img { width: 64px; padding: 4px 7px; }
  .wordmark { font-size: 11px; letter-spacing: 0.28em; }
}

/* 1 · Portada: el texto en su columna de lámina y el video al lado, sin taparlo (antes iba en un recuadro encima del video) */
.hero { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); min-height: min(82svh, 760px); border-bottom: var(--frame); }
.hero-media { grid-column: 2; grid-row: 1; position: relative; overflow: hidden; background: var(--nucleo-900); border-left: var(--frame); }
.hero-video, .hero-still { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: 70% 50%; }
.hero-still { display: none; }
@media (prefers-reduced-motion: reduce) { .hero-video { display: none; } .hero-still { display: block; } }
.hero-over { grid-column: 1; grid-row: 1; display: grid; align-items: center; max-width: none; margin: 0; padding-block: clamp(40px, 6vw, 88px); padding-inline: max(var(--gutter), calc((100vw - 1240px) / 2 + var(--gutter))) clamp(24px, 3.5vw, 56px); }
.hero-card { display: grid; gap: 22px; max-width: 560px; }
.hero h1 { font-size: clamp(2.3rem, 4.8vw, 4rem); line-height: 1.02; letter-spacing: -0.035em; }
.cta { display: flex; flex-wrap: wrap; gap: 10px; }
.slogan { text-wrap: balance; font: 400 11px/1.6 var(--brand); letter-spacing: 0.14em; text-transform: uppercase; color: var(--c600); padding-top: 18px; border-top: var(--hair); }
@media (max-width: 860px) {
  .hero { grid-template-columns: 1fr; min-height: 0; }
  .hero-media { grid-column: 1; grid-row: 1; aspect-ratio: 16 / 9; border-left: 0; }
  .hero-over { grid-column: 1; grid-row: 2; padding: 28px var(--gutter) 36px; border-top: var(--frame); }
  .hero-card { max-width: none; }
}
@media (max-width: 420px) { .cta .btn { flex: 1 1 100%; } }

/* Secciones: láminas separadas por la línea de grafito */
.sec { padding-block: var(--sec); border-bottom: var(--frame); }
.sec > .wrap { display: grid; gap: clamp(32px, 4vw, 48px); }
.sec-head { display: grid; gap: 16px; }

/* 2 · Así se trabaja hoy: cuatro dibujos de línea de grafito (manual §07) que se mueven en bucle, uno sobre cada problema.
   Con prefers-reduced-motion cada dibujo queda quieto en su cuadro final. */
.hoy { border: var(--frame); }
.leyenda ol { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border-top: 1px solid var(--c200); counter-reset: llamada; }
.leyenda li { counter-increment: llamada; display: grid; gap: 6px; align-content: start; padding: 20px 22px 24px; }
.leyenda li + li { border-left: 1px solid var(--c200); }
.leyenda li::before { content: counter(llamada); display: grid; place-items: center; width: 28px; height: 28px; border-radius: 50%; border: 1.5px solid var(--nucleo); color: var(--nucleo); font: 400 11px/1 var(--brand); margin-bottom: 4px; }
.leyenda h3 { font-size: 1.1rem; }
.leyenda p { color: var(--c600); }
.hoy-turn { font-size: clamp(1.15rem, 1.8vw, 1.45rem); line-height: 1.4; font-weight: 500; letter-spacing: -0.01em; max-width: 40ch; }
@media (max-width: 960px) {
  .leyenda ol { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .leyenda li:nth-child(3) { border-left: 0; }
  .leyenda li:nth-child(n + 3) { border-top: 1px solid var(--c200); }
}
@media (max-width: 520px) {
  .leyenda ol { grid-template-columns: 1fr; }
  .leyenda li { grid-template-columns: 28px 1fr; column-gap: 14px; padding: 16px; }
  .leyenda li + li { border-left: 0; border-top: 1px solid var(--c200); }
  .leyenda li::before { grid-row: span 2; margin: 0; }
  .leyenda .vt { grid-column: 1 / -1; }
}
.leyenda ol { border-top: 0; }
.vt { order: -1; width: 100%; height: auto; overflow: visible; margin-bottom: 14px; --error: #b42318; }
.vt .t { fill: none; stroke: var(--grafito); stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.vt .fondo { fill: var(--lamina); }
.vt text { font: 400 9px var(--sans); fill: var(--c600); text-anchor: middle; }
.vt .mono { text-anchor: start; font-size: 10px; }
.vt .dato { fill: none; stroke: var(--c200); stroke-width: 4; stroke-linecap: round; }
.vt .dato.fino { stroke-width: 3; }
.vt .suave { fill: var(--c50); }
.vt .gris { fill: var(--c100); }
.vt .azul { fill: var(--nucleo-wash); }
.vt .azul-2 { stroke: var(--nucleo-200); }
.vt .foto { fill: var(--nucleo-200); }
.vt .gris-2 { fill: var(--c200); }
.vt .monte { fill: none; stroke: var(--lamina); stroke-width: 1.5; stroke-linejoin: round; stroke-linecap: round; }
.vt .sol { fill: var(--lamina); }
.vt .linea { stroke: var(--c200); stroke-width: 1; }
.vt .marca, .vt .dia { font-family: var(--brand); fill: var(--grafito); letter-spacing: 0.08em; }
.vt .marca { font-size: 7px; }
.vt .dia { font-size: 13px; }
.vt .turno { opacity: 0; }
.vt .turno.fin { opacity: 1; }
/* 1 · Excel */
.v1 .sel { fill: var(--nucleo-wash); stroke: var(--nucleo); stroke-width: 2; }
.v1 .flecha path { fill: none; stroke: var(--nucleo); stroke-width: 1.5; stroke-dasharray: 1; }
.v1 .flecha circle { fill: var(--nucleo); }
.v1 .ref rect { fill: color-mix(in srgb, var(--error) 9%, var(--lamina)); }
.v1 .ref text { fill: var(--error); font-size: 10px; font-weight: 600; }
/* 2 · Pliego */
.v2 .hoja { transform-box: fill-box; transform-origin: left center; }
.v2 .cuenta { font-size: 10px; }
.v2 .dias { font-size: 30px; font-weight: 600; fill: var(--grafito); }
.v2 .dias.err { fill: var(--error); }
.v2 .unidad { font-size: 10px; }
.v2 .pista { fill: var(--c100); }
.v2 .barra { fill: var(--nucleo); transform-box: fill-box; transform-origin: left center; transform: scaleX(0.25); }
/* 3 · Chat */
.v3 .lupa text { font-size: 15px; font-weight: 600; fill: var(--grafito); }
.v3 .chat { font-size: 8px; font-weight: 600; fill: var(--grafito); }
.v3 .aviso { fill: var(--error); }
.v3 .badge { font-size: 9px; font-weight: 600; fill: var(--lamina); }
.v3 .fuga { opacity: 0; }
/* 4 · Cuaderno */
.v4 .letra { stroke-dasharray: 1; }
.v4 .pluma { opacity: 0; }
.v4 .limpio { fill: none; stroke: var(--grafito); stroke-width: 1.5; stroke-linecap: round; }
.v4 .tinta { fill: var(--grafito); }

@media (prefers-reduced-motion: no-preference) {
  .vt .turno { animation: turno var(--t) linear infinite both; animation-delay: calc(var(--k) * var(--t) / 4 - var(--t)); }
  @keyframes turno { 0%, 24.9% { opacity: 1; } 25%, 100% { opacity: 0; } }
  .v1 { --t: 9s; }
  .v1 .sel { animation: v1-sel var(--t) ease-out infinite both; }
  .v1 .flecha path { animation: v1-traza var(--t) cubic-bezier(0.16, 1, 0.3, 1) infinite both; animation-delay: var(--d, 0s); }
  .v1 .flecha circle { animation: v1-punto var(--t) ease-out infinite both; animation-delay: var(--d, 0s); }
  .v1 .ref { animation: v1-ref var(--t) ease-out infinite both; }
  @keyframes v1-sel { 0%, 8% { opacity: 0; } 12%, 90% { opacity: 1; } 96%, 100% { opacity: 0; } }
  @keyframes v1-traza { 0%, 14% { stroke-dashoffset: 1; opacity: 1; } 30%, 90% { stroke-dashoffset: 0; opacity: 1; } 96%, 100% { stroke-dashoffset: 0; opacity: 0; } }
  @keyframes v1-punto { 0%, 27% { opacity: 0; } 31%, 90% { opacity: 1; } 96%, 100% { opacity: 0; } }
  @keyframes v1-ref { 0%, 46% { opacity: 0; transform: none; } 49% { opacity: 1; transform: translateX(-2px); } 51% { transform: translateX(2px); } 53%, 90% { opacity: 1; transform: none; } 96%, 100% { opacity: 0; } }
  .v2 { --t: 12s; }
  .v2 .hoja { animation: v2-hoja calc(var(--t) / 4) cubic-bezier(0.45, 0, 0.55, 1) infinite both; }
  .v2 .barra { animation: v2-barra var(--t) linear infinite both; }
  @keyframes v2-hoja { 0%, 66% { transform: none; opacity: 1; } 84% { transform: scaleX(0.45) skewY(-5deg); opacity: 0.9; } 97% { transform: scaleX(0.02) skewY(-8deg); opacity: 0.3; } 100% { transform: scaleX(0); opacity: 0; } }
  @keyframes v2-barra { from { transform: scaleX(1); } to { transform: scaleX(0.25); } }
  .v3 { --t: 10s; }
  .v3 .feed { animation: v3-feed var(--t) linear infinite both; }
  .v3 .lupa { animation: v3-lupa 2.6s ease-in-out infinite alternate both; }
  .v3 .fuga { animation: v3-fuga 3.3s ease-in infinite both; animation-delay: var(--d, 0s); }
  @keyframes v3-feed { from { transform: none; } to { transform: translateY(-160px); } }
  @keyframes v3-lupa { from { transform: translate(-6px, 2px); } to { transform: translate(6px, -2px); } }
  @keyframes v3-fuga { 0% { opacity: 0; transform: translate(-24px, 8px); } 20% { opacity: 1; transform: none; } 100% { opacity: 0; transform: translate(48px, -56px) rotate(18deg); } }
  .v4 { --t: 12s; }
  .v4 .letra { animation: v4-letra var(--t) linear infinite both; animation-delay: var(--d, 0s); }
  .v4 .pluma { animation: v4-pluma var(--t) linear infinite both; }
  .v4 .limpio { animation: v4-limpio var(--t) ease-out infinite both; }
  .v4 .caida { transform-box: fill-box; transform-origin: right top; animation: v4-caida calc(var(--t) / 4) ease-in infinite both; }
  @keyframes v4-letra { 0% { stroke-dashoffset: 1; opacity: 1; } 7%, 84% { stroke-dashoffset: 0; opacity: 1; } 88%, 100% { stroke-dashoffset: 0; opacity: 0; } }
  @keyframes v4-pluma {
    0% { opacity: 1; transform: translate(-54px, 0); } 7% { transform: translate(0, 0); }
    7.01% { transform: translate(-54px, 16px); } 14% { transform: translate(0, 16px); }
    14.01% { transform: translate(-54px, 32px); } 21% { transform: translate(0, 32px); }
    21.01% { transform: translate(-54px, 48px); } 28% { opacity: 1; transform: translate(-6px, 48px); } 32%, 100% { opacity: 0; transform: translate(-6px, 48px); }
  }
  @keyframes v4-limpio { 0%, 76% { opacity: 0; transform: translateY(4px); } 80%, 94% { opacity: 1; transform: none; } 98%, 100% { opacity: 0; } }
  @keyframes v4-caida { 0%, 80% { opacity: 1; transform: none; } 100% { opacity: 0; transform: translate(6px, 44px) rotate(-16deg); } }
}

/* 3 · Recorrido: un eje de plano une los cuatro momentos, en el orden real de una obra */
.recorrido { list-style: none; padding: 0; position: relative; display: grid; }
.recorrido::before {
  content: ''; position: absolute; left: 47px; top: 22px; bottom: 22px; width: 1.5px;
  background: var(--nucleo-300); transform-origin: top;
}
@supports (animation-timeline: view()) {
  @media (prefers-reduced-motion: no-preference) {
    .recorrido::before { animation: trazar linear both; animation-timeline: view(); animation-range: entry 20% cover 75%; }
    @keyframes trazar { from { transform: scaleY(0); } to { transform: scaleY(1); } }
  }
}
.momento { display: grid; grid-template-columns: 96px minmax(0, 0.9fr) minmax(0, 1.1fr); column-gap: clamp(20px, 3vw, 48px); padding-block: clamp(28px, 4vw, 56px); position: relative; }
.momento + .momento { border-top: var(--hair); }
.eje { display: grid; justify-items: center; align-content: start; gap: 10px; }
.burbuja {
  position: relative; z-index: 1; display: grid; place-items: center; width: 46px; height: 46px; border-radius: 50%;
  background: var(--lamina); border: 1.5px solid var(--nucleo); color: var(--nucleo);
  font: 400 15px/1 var(--brand);
}
.m-label { writing-mode: vertical-rl; transform: rotate(180deg); padding-inline: 2px; font: 400 11px/1.4 var(--brand); letter-spacing: 0.1em; text-transform: uppercase; color: var(--nucleo-deep); background: var(--lamina); padding-block: 4px; text-align: center; }
.m-texto { display: grid; gap: 14px; align-content: start; padding-top: 8px; }
.m-texto h3 { font-size: clamp(1.35rem, 2vw, 1.7rem); letter-spacing: -0.025em; line-height: 1.15; }
.m-texto p { color: var(--c600); max-width: 52ch; }
.m-texto ul { padding: 0; list-style: none; display: grid; gap: 8px; color: var(--grafito); }
.m-texto li { display: grid; grid-template-columns: 14px 1fr; gap: 10px; align-items: baseline; }
.m-texto li::before { content: ''; width: 10px; height: 1.5px; background: var(--nucleo); transform: translateY(-4px); }

.m-media { display: grid; grid-template-columns: minmax(0, 1fr); align-content: start; }
.m-media .foto { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; border: var(--frame); }
.m-media .captura { width: auto; max-width: 100%; margin: -12% 0 0 auto; position: relative; background: var(--lamina); border: var(--frame); }
.m-media figcaption { margin-top: 10px; font-size: 0.8rem; line-height: 1.4; color: var(--c600); text-align: right; }
.m-media .ficha { width: 88%; padding: 6px 18px 10px; font-size: 0.9rem; background: var(--draft-muted); border: 2px dashed var(--draft); border-radius: 4px; }
.ficha p { display: flex; justify-content: space-between; align-items: baseline; gap: 16px; padding-block: 11px; }
.ficha .ficha-head { padding-bottom: 12px; font: 400 11px/1.4 var(--brand); letter-spacing: 0.1em; text-transform: uppercase; color: var(--c600); border-bottom: 1.5px solid var(--draft); }
.ficha .ficha-head { flex-wrap: wrap; gap: 8px; }
.ficha .badge-draft { font-family: var(--sans); letter-spacing: 0; text-transform: none; }
.ficha-row + .ficha-row { border-top: 1px solid #d3d7ef; }
.ficha .pag { flex: none; color: var(--nucleo-deep); background: var(--nucleo-wash); padding: 2px 8px; border-radius: 4px; font-size: 0.8rem; font-weight: 500; }
.ficha .pag.sin { color: #9a5b00; background: #fbefd9; }
.m-obra { position: relative; }
.m-obra .celular { position: absolute; top: 5%; right: 4%; width: 34%; margin: 0; border-radius: 18px; border-width: 2px; padding: 6px; }
/* Momento 5: la pantalla de planificación tal cual y, debajo, la curva S y la franja de costos */
.m-control .app img { width: 100%; border: var(--frame); background: var(--lamina); }
.m-control .pareja { display: grid; gap: 12px; margin-top: 12px; }
.m-control .pareja img { width: 100%; border: var(--frame); background: var(--lamina); }

@media (max-width: 960px) {
  .recorrido::before { left: 22px; }
  .momento { grid-template-columns: 46px minmax(0, 1fr); row-gap: 20px; }
  .eje { grid-row: span 2; }

}

/* 4 · La IA: principios y el borrador real (índigo con borde discontinuo; DESIGN.md) */
.ia-grid { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); align-items: start; column-gap: clamp(32px, 6vw, 96px); }
.principios { margin-top: 32px; border-top: var(--frame); }
.principios > div { padding-block: 18px; border-bottom: var(--hair); display: grid; gap: 4px; }
.principios dt { font-weight: 600; font-size: 1.1rem; }
.principios dd { color: var(--c600); }
.borrador-wrap { display: grid; gap: 12px; padding-top: 8px; }
.borrador { background: var(--draft-muted); border: 2px dashed var(--draft); border-radius: 4px; padding: clamp(20px, 3vw, 28px); display: grid; gap: 14px; }
.badge-draft { justify-self: start; background: var(--lamina); color: var(--draft); font-size: 0.78rem; font-weight: 600; padding: 3px 8px; border-radius: 4px; border: 1px dashed var(--draft); }
.cita summary {
  display: inline-flex; align-items: center; gap: 8px; min-height: 44px; padding: 0 12px; cursor: pointer; list-style: none;
  background: var(--nucleo-wash); color: var(--nucleo-deep); border-radius: 4px; font-weight: 500; font-size: 0.92rem;
}
.cita summary::-webkit-details-marker { display: none; }
.cita summary svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linejoin: round; }
.cita summary:hover { background: #e3ecf3; }
.cita blockquote { margin-top: 10px; padding: 14px 16px; background: var(--lamina); border: var(--hair); font-size: 0.95rem; line-height: 1.55; }
@media (prefers-reduced-motion: no-preference) {
  .cita[open] blockquote { animation: aparece 220ms cubic-bezier(0.16, 1, 0.3, 1); }
  @keyframes aparece { from { opacity: 0; transform: translateY(-4px); } }
}
.borrador-acciones { display: flex; flex-wrap: wrap; gap: 8px; }
.borrador-acciones .btn { cursor: default; }
.borrador-acciones .btn:active { transform: none; }
.nota { font-size: 0.82rem; color: var(--c600); }
@media (max-width: 860px) { .ia-grid { grid-template-columns: 1fr; row-gap: 32px; } }

/* 5 · Hecha para Panamá: como el cajetín de un plano */
.cajetin { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.5px; background: var(--grafito); border: var(--frame); }
.cajetin > div { background: var(--lamina); padding: 20px 22px 24px; display: grid; gap: 6px; align-content: start; }
.cajetin dt { font: 400 11px/1.4 var(--brand); letter-spacing: 0.12em; text-transform: uppercase; color: var(--c600); }
.cajetin .v { font-size: clamp(1.4rem, 2.2vw, 1.8rem); font-weight: 600; letter-spacing: -0.025em; line-height: 1.15; }
.cajetin dd:not(.v) { color: var(--c600); font-size: 0.95rem; }
@media (max-width: 760px) { .cajetin { grid-template-columns: repeat(2, minmax(0, 1fr)); } .cajetin > div { padding: 16px 14px; } .cajetin .v { font-size: 1.2rem; overflow-wrap: anywhere; } }

/* 6 · Cierre */
.cierre { border-bottom: 0; }
.cierre-grid { grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr); align-items: center; column-gap: clamp(32px, 5vw, 80px); }
.cierre .foto { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; border: var(--frame); }
.cierre-texto { display: grid; gap: 22px; }
.contacto { color: var(--c600); font-size: 0.95rem; }
@media (max-width: 860px) { .cierre-grid { grid-template-columns: 1fr; row-gap: 28px; } .cierre .foto { aspect-ratio: 16 / 9; } }

/* Pie */
.pie { border-top: var(--frame); padding-block: 28px calc(28px + env(safe-area-inset-bottom, 0px)); font-size: 0.85rem; color: var(--c600); }
.pie-bar { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 28px; }
.pie .lockup .iso { width: 22px; height: 22px; }
.pie .wordmark { font-size: 11px; }
.pie a { color: var(--c600); }
.pie span:last-child { margin-left: auto; }
@media (max-width: 760px) { .pie span:last-child { margin-left: 0; flex-basis: 100%; } }
@media (max-width: 560px) {
  .m-media .ficha { width: 100%; }
}
.m-media picture.captura img { width: 100%; }
@media (max-width: 560px) {
  .m-obra .celular { position: relative; top: auto; right: auto; width: 78%; margin: -10% auto 0; background: var(--lamina); }
}

/* Calculadoras: la hoja de datos a la izquierda y el resultado como cajetín a la derecha */
.top-nav a[aria-current="page"] { color: var(--grafito); text-decoration: underline; text-decoration-color: var(--nucleo); text-decoration-thickness: 1.5px; text-underline-offset: 8px; }
.calc { padding-bottom: var(--sec); }
.calc-head { display: grid; gap: 16px; padding-block: clamp(32px, 5vw, 64px) clamp(28px, 4vw, 44px); }
.calc-head h1 { font-size: clamp(2.1rem, 4.2vw, 3.4rem); line-height: 1.04; letter-spacing: -0.035em; }
.volver { display: inline-flex; align-items: center; gap: 4px; justify-self: start; min-height: 44px; margin-block: -12px -8px; color: var(--c600); text-decoration: none; font-size: 0.95rem; }
.volver:hover { color: var(--grafito); }
.volver svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 2; }
.calc-grid { display: grid; grid-template-columns: minmax(0, 1.75fr) minmax(300px, 1fr); gap: clamp(20px, 3vw, 40px); align-items: start; }
@media (max-width: 900px) { .calc-grid { grid-template-columns: 1fr; } }

.hoja { border: var(--frame); background: var(--lamina); }
.grupo { margin: 0; border: 0; padding: clamp(18px, 2.4vw, 28px); display: grid; gap: 16px; min-width: 0; }
.grupo + .grupo { border-top: var(--hair); }
.grupo legend { float: left; width: 100%; padding: 0; margin-bottom: 4px; font: 400 11px/1.4 var(--brand); letter-spacing: 0.12em; text-transform: uppercase; color: var(--c600); }
.grupo-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grupo-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grupo-2 > legend, .grupo-3 > legend { grid-column: 1 / -1; }
@media (max-width: 560px) { .grupo-2, .grupo-3 { grid-template-columns: 1fr; } }
.grupo > .btn { justify-self: start; }

.campo { display: grid; gap: 6px; align-content: start; min-width: 0; font-size: 0.9rem; color: var(--c600); }
.campo[hidden] { display: none; }
.campo > span:first-child { font-weight: 500; }
.entrada { position: relative; display: block; }
.campo input, .campo select {
  width: 100%; min-height: 44px; padding: 0 12px; border: 1px solid var(--control); border-radius: 4px; background: var(--lamina);
  color: var(--grafito); font: 500 1rem/1 var(--sans); font-variant-numeric: tabular-nums; caret-color: var(--nucleo);
}
.campo select { appearance: none; padding-right: 36px; cursor: pointer; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%234a4f57' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 10px center; background-size: 18px; }
.entrada input { padding-right: 52px; }
.fila .entrada input { padding-right: 30px; padding-left: 10px; }
.fila .entrada .u { right: 10px; }
.entrada .u { position: absolute; right: 12px; top: 50%; transform: translateY(-50%); color: var(--c600); font-size: 0.9rem; pointer-events: none; }
.campo input:hover, .campo select:hover { border-color: var(--grafito); }
.campo input:focus-visible, .campo select:focus-visible { outline: 2px solid var(--nucleo); outline-offset: 0; border-color: var(--nucleo); }
.campo input::placeholder { color: #8a9099; }
.campo input[aria-invalid="true"] { border-color: #b3261e; background: #fdf3f2; }
.campo .error { display: none; color: #b3261e; font-size: 0.82rem; }
.campo:has(input[aria-invalid="true"]) .error { display: block; }

/* Filas que se agregan: número de llamada, campos, resultado parcial y quitar */
.filas { list-style: none; margin: 0; padding: 0; display: grid; }
.fila { display: grid; grid-template-columns: 28px minmax(0, 1.3fr) repeat(3, minmax(0, 1fr)) minmax(0, 0.7fr) minmax(76px, auto) 44px; gap: 10px; align-items: end; padding-block: 14px; }
.fila-barras { grid-template-columns: 28px minmax(0, 1.4fr) repeat(2, minmax(0, 1fr)) minmax(90px, auto) 44px; }
.fila + .fila { border-top: var(--hair); }
.fila:first-child { padding-top: 0; }
.fila-n { display: grid; place-items: center; width: 28px; height: 28px; margin-bottom: 8px; border-radius: 50%; border: 1.5px solid var(--nucleo); color: var(--nucleo); font: 400 11px/1 var(--brand); }
.fila-out { min-height: 44px; display: flex; flex-direction: column; align-items: flex-end; justify-content: center; font-weight: 600; white-space: nowrap; }
.fila-out .kgm { font-size: 0.8rem; color: var(--c600); font-weight: 400; }
.quitar { width: 44px; height: 44px; display: grid; place-items: center; border: 0; border-radius: 4px; background: none; color: var(--c600); cursor: pointer; }
.quitar:hover { background: var(--c100); color: var(--grafito); }
.quitar svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 2; }
.quitar[hidden] { display: grid; visibility: hidden; }
@media (max-width: 720px) {
  .fila, .fila-barras { grid-template-columns: 28px repeat(2, minmax(0, 1fr)) 44px; align-items: start; }
  .fila > * { grid-column: 2 / 4; }
  .fila > .fila-n { grid-column: 1; grid-row: 1; }
  .fila > .quitar { grid-column: 4; grid-row: 1; }
  .fila > .campo-tipo { grid-row: 1; }
  .fila > .campo-par:nth-child(odd) { grid-column: 2; }
  .fila > .campo-par:nth-child(even) { grid-column: 3 / -1; }
  .fila-out { min-height: 0; flex-direction: row; justify-content: flex-start; align-items: baseline; gap: 10px; }
}

/* Resultado: el cajetín; Azul Núcleo solo en la cifra que manda */
.resultado { position: sticky; top: 92px; display: grid; gap: 12px; }
.resultado h2 { font-size: 1.15rem; letter-spacing: -0.015em; }
.cajetin-res { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.cajetin-res .manda, .cajetin-res .ancho { grid-column: 1 / -1; }
.cajetin-res .manda .v { color: var(--nucleo); font-size: clamp(1.9rem, 3vw, 2.4rem); }
.cajetin-res .v small { font-size: max(0.55em, 0.75rem); font-weight: 500; color: var(--c600); letter-spacing: 0; }
.cajetin-res dd:not(.v) { font-size: 0.85rem; }
.varillas { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; }
.varillas li { display: flex; justify-content: space-between; gap: 12px; font-size: 0.95rem; color: var(--grafito); }
.varillas small { color: var(--c600); }
@media (max-width: 900px) { .resultado { position: static; } }

/* Fórmula visible e invitación */
.formula { display: grid; gap: 24px; padding-top: clamp(48px, 7vw, 88px); }
.formula-grid { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr); gap: clamp(20px, 3vw, 40px); align-items: start; }
@media (max-width: 900px) { .formula-grid { grid-template-columns: 1fr; } }
.pasos { list-style: none; margin: 0; padding: 0; border-top: var(--frame); counter-reset: paso; }
.pasos li { counter-increment: paso; display: grid; grid-template-columns: 28px 1fr; column-gap: 14px; row-gap: 4px; padding-block: 16px; border-bottom: var(--hair); }
.pasos li::before { content: counter(paso); grid-row: span 2; display: grid; place-items: center; width: 28px; height: 28px; border-radius: 50%; border: 1.5px solid var(--nucleo); color: var(--nucleo); font: 400 11px/1 var(--brand); }
.pasos p { grid-column: 2; color: var(--c600); font-size: 0.95rem; }
.pasos.factores { counter-reset: none; }
.pasos.factores li { grid-template-columns: 1fr; }
.pasos.factores li::before { content: none; }
.pasos.factores p { grid-column: 1; }
.pasos .eq { color: var(--grafito); font-size: 1.05rem; font-weight: 500; overflow-wrap: anywhere; }
.aviso { padding: 18px 20px; background: var(--c50); border: var(--hair); color: var(--c600); font-size: 0.95rem; }
.aviso strong { color: var(--grafito); }
.invita { margin-top: clamp(48px, 7vw, 88px); padding-block: clamp(28px, 4vw, 44px); border-top: var(--frame); border-bottom: var(--frame); display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 24px 48px; align-items: center; }
.invita > div:first-child { display: grid; gap: 12px; }
@media (max-width: 860px) { .invita { grid-template-columns: 1fr; } }

/* Perfiles: forma, dibujo a escala y unidades */
.formas { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 8px; }
.forma { position: relative; }
.forma input, .segmento input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.forma span { display: grid; justify-items: center; gap: 6px; padding: 12px 6px 10px; border: 1px solid var(--c200); border-radius: 4px; cursor: pointer; font-size: 0.85rem; color: var(--c600); text-align: center; }
.forma svg { width: 40px; height: 40px; fill: none; stroke: var(--grafito); stroke-width: 2.5; }
.forma span:hover { border-color: var(--grafito); }
.forma input:checked + span { border-color: var(--nucleo); box-shadow: inset 0 0 0 1px var(--nucleo); background: var(--nucleo-wash); color: var(--nucleo-ink); }
.forma input:checked + span svg { stroke: var(--nucleo); }
.forma input:focus-visible + span, .segmento input:focus-visible + span { outline: 2px solid var(--nucleo); outline-offset: 2px; }
@media (max-width: 560px) { .formas { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
.segmento { display: inline-flex; flex-wrap: wrap; justify-self: start; border: 1px solid var(--control); border-radius: 4px; overflow: hidden; }
.segmento label { position: relative; flex: 1 0 auto; }
.segmento span { display: grid; place-items: center; min-height: 44px; min-width: 64px; padding: 0 14px; cursor: pointer; font-size: 0.9rem; color: var(--c600); box-shadow: -1px 0 0 var(--control); }
.segmento input:checked + span { background: var(--grafito); color: #fff; }
.hoja > .cajetin { border: 0; }
.dibujo { display: grid; place-items: center; padding: 12px; border-bottom: 1.5px solid var(--grafito); }
.dibujo svg { width: min(220px, 100%); height: auto; }
.sec-llena { fill: var(--grafito); }
.sec-eje { fill: none; stroke: var(--nucleo); stroke-width: 1; stroke-dasharray: 10 3 2 3; }
.sec-cota { fill: none; stroke: var(--c600); stroke-width: 1; }
.sec-letra { font: italic 500 13px var(--sans); fill: var(--grafito); text-anchor: middle; dominant-baseline: central; }
.geo { color: #b3261e; font-size: 0.9rem; grid-column: 1 / -1; }

/* Conversión: tabla de equivalencias */
.equivalencias { width: 100%; border-collapse: collapse; border: var(--frame); background: var(--lamina); }
.equivalencias th, .equivalencias td { padding: 12px 16px; text-align: left; border-bottom: var(--hair); }
.equivalencias th { font-weight: 400; color: var(--c600); }
.equivalencias td:nth-child(2) { text-align: right; font-weight: 600; white-space: nowrap; }
.equivalencias td:nth-child(3) { width: 1%; padding-left: 0; white-space: nowrap; color: var(--c600); }
@media (max-width: 420px) { .equivalencias th, .equivalencias td { padding: 12px 10px; } .equivalencias th { font-size: 0.9rem; } }

/* Índice de calculadoras, como el índice de láminas de un juego de planos */
.indice { list-style: none; margin: 0; padding: 0; border-top: var(--frame); }
.indice li { border-bottom: var(--hair); }
.indice a { display: grid; grid-template-columns: minmax(0, 1fr) 24px; gap: 6px 24px; align-items: center; padding: 22px 8px; color: var(--grafito); text-decoration: none; }
.indice a:hover { background: var(--nucleo-wash); }
.indice h2 { font-size: clamp(1.3rem, 2vw, 1.6rem); letter-spacing: -0.02em; max-width: none; }
.indice p { color: var(--c600); max-width: 70ch; }
.indice svg { grid-row: 1 / span 2; grid-column: 2; width: 24px; height: 24px; fill: none; stroke: var(--nucleo); stroke-width: 2; }
@media (prefers-reduced-motion: no-preference) { .indice svg { transition: transform 160ms ease-out; } .indice a:hover svg { transform: translateX(4px); } }

/* En el celular el resultado queda debajo del formulario: una franja fija con la cifra que manda lo trae a la vista */
.franja { display: none; }
@media (max-width: 900px) {
  .franja {
    position: fixed; inset: auto 0 0 0; z-index: 9; display: flex; align-items: center; justify-content: space-between; gap: 12px;
    min-height: 56px; padding: 8px var(--gutter) calc(8px + env(safe-area-inset-bottom, 0px)); background: var(--lamina); border-top: var(--frame);
    color: var(--grafito); text-decoration: none; font-variant-numeric: tabular-nums;
  }
  .franja strong { color: var(--nucleo); font-size: 1.35rem; font-weight: 600; letter-spacing: -0.02em; }
  .franja span:last-child { display: inline-flex; align-items: center; gap: 4px; color: var(--c600); font-size: 0.9rem; }
  .franja svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 2; }
  body:has(.franja) { padding-bottom: 72px; }
}