@font-face {
  font-family: "Open Sans";
  src: url("fuentes/open-sans.woff2") format("woff2");
  font-weight: 300 800;
  font-display: swap;
}

:root {
  /* Identidad ULS: Pantone 288C y 186C (mismos tokens que PDF ULS y el Anonimizador) */
  --azul: #002d72; --azul-oscuro: #001d4d; --azul-suave: #e8eef8; --rojo: #c8102e; --acento: #0f766e;
  --fondo: #f3f5f9; --panel: #ffffff; --texto: #1a2233; --tenue: #5b6475; --borde: #dce1ea;
  --radio: 8px; --sombra: 0 1px 2px rgba(0, 29, 77, .06), 0 2px 8px rgba(0, 29, 77, .05);
  --cuadros: repeating-conic-gradient(#e3e6ec 0 25%, #fff 0 50%) 0 0 / 22px 22px;
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
[hidden] { display: none !important; }
html { background: var(--fondo); }
body { margin: 0; min-height: 100vh; display: flex; flex-direction: column; font: 15px/1.55 "Open Sans", system-ui, sans-serif; background: var(--fondo); color: var(--texto); }
h1, h2, h3 { margin: 0; color: var(--azul); }
button, input, select { font: inherit; color: inherit; }
main { flex: 1; }

.barra { display: flex; align-items: center; gap: 20px; padding: 14px 32px; background: var(--azul); color: #fff; }
.titulo { color: #fff; text-decoration: none; }
.titulo h1 { color: #fff; font-size: 19px; font-weight: 600; }
.titulo p { margin: 0; font-size: 13px; opacity: .8; }
.sello { margin-left: auto; font-size: 12px; padding: 4px 12px; border: 1px solid rgba(255, 255, 255, .4); border-radius: 999px; white-space: nowrap; }
.franja { height: 4px; background: var(--rojo); }
.contenedor { width: 100%; max-width: 1320px; margin: 0 auto; padding: 24px 32px 40px; }

/* Portada */
.portada { position: relative; overflow: hidden; color: #fff; background: radial-gradient(circle at 8% 110%, rgba(200, 16, 46, .35) 0 160px, transparent 161px), linear-gradient(120deg, var(--azul-oscuro), var(--azul) 55%, #13448f); }
.portada::after { content: ""; position: absolute; inset: 0; background-image: radial-gradient(rgba(255, 255, 255, .12) 1px, transparent 1.5px); background-size: 22px 22px; mask-image: linear-gradient(90deg, #000, transparent 55%); pointer-events: none; }
.portada-interior { position: relative; z-index: 1; display: grid; grid-template-columns: 1.1fr 1fr; gap: 40px; align-items: center; padding-top: 56px; padding-bottom: 64px; }
.portada h2 { color: #fff; font-size: clamp(28px, 4vw, 42px); line-height: 1.12; letter-spacing: -.01em; }
.bajada { margin: 14px 0 18px; font-size: 17px; opacity: .9; max-width: 560px; }
.ventajas { margin: 0; padding: 0; list-style: none; display: grid; gap: 8px; }
.ventajas li { display: flex; gap: 10px; align-items: center; font-size: 15px; }
.ventajas span { display: grid; place-items: center; width: 22px; height: 22px; border-radius: 50%; background: rgba(255, 255, 255, .16); font-size: 12px; font-weight: 700; }

.zona { display: flex; flex-direction: column; align-items: center; gap: 8px; padding: 46px 24px; border: 2px dashed rgba(0, 45, 114, .25); border-radius: 18px; background: #fff; color: var(--tenue); text-align: center; cursor: pointer; box-shadow: 0 20px 50px rgba(0, 10, 40, .35); transition: transform .18s, border-color .18s; }
.zona svg { width: 54px; height: 54px; color: var(--azul); }
.zona:hover, .zona.arrastrando { border-color: var(--azul); transform: translateY(-2px); }
.zona:focus-visible { outline: 3px solid rgba(255, 255, 255, .6); outline-offset: 4px; }
.boton-zona { padding: 12px 30px; border-radius: 999px; background: var(--rojo); color: #fff; font-size: 17px; font-weight: 700; box-shadow: 0 6px 16px rgba(200, 16, 46, .35); }
.zona small { font-size: 12px; }

/* Área de trabajo */
.tira { display: flex; gap: 10px; overflow-x: auto; padding-bottom: 6px; margin-bottom: 16px; }
.miniatura { position: relative; flex: none; width: 84px; height: 84px; padding: 0; border: 2px solid transparent; border-radius: 10px; background: var(--cuadros); overflow: hidden; cursor: pointer; box-shadow: var(--sombra); }
.miniatura img { width: 100%; height: 100%; object-fit: contain; }
.miniatura.actual { border-color: var(--azul); }
.miniatura .marca { position: absolute; right: 4px; bottom: 4px; display: grid; place-items: center; width: 20px; height: 20px; border-radius: 50%; font-size: 11px; font-weight: 700; color: #fff; background: var(--tenue); }
.miniatura .marca.listo { background: #1d6b3a; }
.miniatura .marca.error { background: var(--rojo); }
.miniatura .marca.procesando { background: var(--azul); animation: latir 1s infinite alternate; }
.miniatura.agregar { display: grid; place-items: center; background: var(--panel); border: 2px dashed var(--borde); color: var(--azul); font-size: 30px; }
@keyframes latir { to { opacity: .4; } }

.grid-trabajo { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 22px; align-items: start; }
.area { min-width: 0; }
.herramientas { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 16px; margin-bottom: 12px; }
.pincel, .comparar { display: flex; align-items: center; gap: 8px; font-size: 13px; font-weight: 600; color: var(--tenue); }
.comparar { margin-left: auto; }
input[type=range] { accent-color: var(--azul); }

.vista { position: relative; display: grid; place-items: center; min-height: 360px; max-height: 72vh; padding: 14px; border-radius: 12px; background: var(--panel); border: 1px solid var(--borde); box-shadow: var(--sombra); overflow: hidden; }
#lienzo { display: block; max-width: 100%; max-height: calc(72vh - 30px); background: var(--cuadros); border-radius: 4px; touch-action: pan-y pinch-zoom; }
.vista.retoque #lienzo { cursor: none; touch-action: none; }
.circulo { position: absolute; pointer-events: none; border: 2px solid #fff; border-radius: 50%; box-shadow: 0 0 0 1px rgba(0, 0, 0, .55); transform: translate(-50%, -50%); }
.estado-ia { position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 12px; background: rgba(255, 255, 255, .86); backdrop-filter: blur(3px); text-align: center; padding: 20px; }
.estado-ia p { margin: 0; font-weight: 600; color: var(--azul); max-width: 420px; }
.girando { width: 42px; height: 42px; border-radius: 50%; border: 4px solid var(--azul-suave); border-top-color: var(--azul); animation: girar .8s linear infinite; }
@keyframes girar { to { transform: rotate(1turn); } }
.barra-progreso { width: min(320px, 80%); height: 6px; border-radius: 3px; background: var(--azul-suave); overflow: hidden; }
.barra-progreso div { height: 100%; width: 0; background: var(--azul); transition: width .2s; }
.ayuda { margin: 10px 0 0; font-size: 13px; color: var(--tenue); }

/* Panel lateral */
.panel { position: sticky; top: 16px; padding: 18px 20px; background: var(--panel); border: 1px solid var(--borde); border-radius: 12px; box-shadow: var(--sombra); }
.panel h3 { font-size: 13px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; margin: 18px 0 10px; }
.panel h3:first-child { margin-top: 0; }
.op { margin-top: 12px; }
.muestras { display: flex; flex-wrap: wrap; gap: 8px; }
.muestra { width: 32px; height: 32px; padding: 0; border-radius: 50%; border: 2px solid #fff; box-shadow: 0 0 0 1px var(--borde); cursor: pointer; }
.muestra.activa { box-shadow: 0 0 0 2px var(--azul); }
.campo { display: block; margin-top: 10px; font-size: 13px; font-weight: 600; color: var(--tenue); }
.campo small { display: block; font-weight: 400; font-size: 12px; }
.campo select, .campo input[type=file] { display: block; width: 100%; margin-top: 6px; }
.campo select { padding: 8px 10px; border: 1px solid var(--borde); border-radius: var(--radio); background: #fbfcfe; font-weight: 400; color: var(--texto); }
.campo input[type=color] { display: block; width: 100%; height: 36px; margin-top: 6px; padding: 2px; border: 1px solid var(--borde); border-radius: var(--radio); background: #fbfcfe; }
.campo input[type=range] { display: block; width: 100%; }
#diagnostico.ok { color: #1d6b3a; }
#diagnostico.aviso { color: #8a5a00; }
.opcion { display: flex; gap: 8px; align-items: flex-start; font-size: 14px; cursor: pointer; }
.opcion input { margin-top: 4px; accent-color: var(--azul); }
.opcion small { display: block; color: var(--tenue); font-size: 12px; }

/* Botones */
button { padding: 9px 16px; border: 1px solid var(--azul); border-radius: var(--radio); background: var(--azul); color: #fff; font-weight: 600; cursor: pointer; transition: background .15s, opacity .15s; }
button:disabled { opacity: .5; cursor: default; }
button.secundario { background: var(--panel); color: var(--azul); }
button.principal { background: var(--rojo); border-color: var(--rojo); padding: 12px 16px; font-size: 16px; }
.ancho { width: 100%; margin-top: 10px; }
button:focus-visible, .miniatura:focus-visible { outline: 3px solid rgba(200, 16, 46, .45); outline-offset: 2px; }
@media (hover: hover) {
  button:not(:disabled):hover { background: var(--azul-oscuro); }
  button.secundario:not(:disabled):hover { background: var(--azul-suave); }
  button.principal:not(:disabled):hover { background: #a50d26; }
  button.miniatura:not(:disabled):hover { background: var(--cuadros); border-color: var(--azul); }
  button.miniatura.agregar:hover { background: var(--azul-suave); }
}
.segmentado { display: inline-flex; border: 1px solid var(--azul); border-radius: var(--radio); overflow: hidden; }
.segmentado.ancho { display: flex; width: 100%; margin-top: 0; }
.segmentado button { flex: 1; border: 0; border-radius: 0; background: var(--panel); color: var(--azul); padding: 7px 10px; font-size: 13.5px; line-height: 1.25; }
.segmentado button + button { border-left: 1px solid var(--azul); }
.segmentado button.activo { background: var(--azul); color: #fff; }
.segmentado.cuadricula { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--azul); }
.segmentado.cuadricula button + button { border-left: 0; }
.segmentado small { display: block; font-size: 10.5px; font-weight: 400; opacity: .8; }

.toast { position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%); margin: 0; padding: 10px 18px; background: var(--azul-oscuro); color: #fff; border-radius: var(--radio); font-size: 13.5px; box-shadow: 0 6px 24px rgba(0, 0, 0, .2); z-index: 20; max-width: calc(100% - 32px); }
footer { padding: 18px 32px; border-top: 3px solid var(--azul); background: var(--panel); color: var(--tenue); font-size: 12.5px; text-align: center; }

@media (max-width: 900px) {
  .barra { padding: 12px 16px; }
  .sello { display: none; }
  .contenedor { padding: 16px 16px 32px; }
  .portada-interior { grid-template-columns: 1fr; gap: 24px; padding-top: 28px; padding-bottom: 36px; }
  .grid-trabajo { grid-template-columns: 1fr; }
  .panel { position: static; }
  .comparar { margin-left: 0; }
  .vista { min-height: 260px; }
}
@media (prefers-reduced-motion: reduce) { * { animation: none !important; transition: none !important; } }