:root {
  --tinta: #1D3557; --papel: #E9EEF2; --hoja: #FFFFFF; --sol: #F4D35E;
  --gris: #5B6B7C; --linea: #CBD5DF; --peligro: #B5452C; --ok: #2E7D5B;
  font-family: "Segoe UI Variable Text", "Segoe UI", system-ui, -apple-system, Roboto, sans-serif;
  color: var(--tinta); background: var(--papel);
}
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; }
button, input, textarea { font: inherit; color: inherit; }
:focus-visible { outline: 3px solid var(--sol); outline-offset: 2px; }

.shell { max-width: 880px; margin: 0 auto; padding: 24px 20px 64px; }
.barra { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-bottom: 40px; }
.marca { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 1.35rem; letter-spacing: .02em; }
.marca img { width: 34px; height: 34px; }
nav { display: flex; gap: 4px; background: var(--hoja); padding: 4px; border-radius: 999px; border: 1px solid var(--linea); }
nav a { padding: 8px 16px; border-radius: 999px; color: var(--gris); text-decoration: none; font-weight: 600; }
nav a[aria-current="page"] { background: var(--tinta); color: #fff; }

h1 { font-size: clamp(2rem, 5vw, 3.2rem); line-height: 1.05; margin: 0 0 12px; letter-spacing: -.02em; }
h2 { font-size: 1.5rem; margin: 0 0 16px; }
p { line-height: 1.6; max-width: 62ch; }
.sub { color: var(--gris); font-size: 1.1rem; margin: 0 0 28px; }

.capas { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 0; border: 2px solid var(--tinta); border-radius: 12px; overflow: hidden; background: var(--hoja); margin-bottom: 28px; }
.capas div { padding: 18px; border-right: 1px solid var(--linea); }
.capas div:last-child { border-right: 0; }
.capas strong { display: block; margin-bottom: 4px; }
.capas span { color: var(--gris); font-size: .95rem; }

.panel { background: var(--hoja); border: 1px solid var(--linea); border-radius: 12px; padding: 20px; }
.fila { display: flex; gap: 8px; }
.fila input { flex: 1; }
input[type=text], textarea { width: 100%; padding: 12px 14px; border: 1px solid var(--linea); border-radius: 8px; background: #fff; }
textarea { min-height: 110px; resize: vertical; }
.btn { border: 0; background: var(--tinta); color: #fff; padding: 11px 18px; border-radius: 8px; font-weight: 600; cursor: pointer; }
.btn.claro { background: var(--papel); color: var(--tinta); }
.btn:disabled { opacity: .5; cursor: not-allowed; }

ul.tareas { list-style: none; padding: 0; margin: 16px 0 0; }
ul.tareas li { display: flex; align-items: center; gap: 12px; padding: 12px 4px; border-bottom: 1px solid var(--linea); }
ul.tareas li:last-child { border-bottom: 0; }
ul.tareas label { flex: 1; display: flex; gap: 12px; align-items: center; cursor: pointer; }
ul.tareas input[type=checkbox] { width: 20px; height: 20px; accent-color: var(--tinta); }
.hecha { text-decoration: line-through; color: var(--gris); }
.borrar { background: none; border: 0; color: var(--peligro); cursor: pointer; padding: 6px 8px; border-radius: 6px; }
.vacio { color: var(--gris); padding: 16px 4px 0; }

.resultado { margin-top: 18px; }
.veredicto { font-size: 1.6rem; font-weight: 800; margin: 0 0 12px; }
.barra-prob { display: grid; grid-template-columns: 90px 1fr 48px; align-items: center; gap: 10px; margin: 6px 0; }
.barra-prob .riel { height: 10px; background: var(--papel); border-radius: 99px; overflow: hidden; }
.barra-prob .relleno { height: 100%; background: var(--tinta); transition: width .3s; }
.acciones { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 12px; }
.nota { color: var(--gris); font-size: .9rem; }
.respuesta { margin-top: 14px; padding: 12px 14px; border-left: 4px solid var(--sol); background: var(--papel); border-radius: 0 8px 8px 0; }

@media (max-width: 560px) { .capas div { border-right: 0; border-bottom: 1px solid var(--linea); } }
@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }

/* Cuenta, formularios y tablas */
.barra nav { order: 2; }
a.cuenta { order: 3; font-weight: 600; color: var(--tinta); text-decoration: none; padding: 8px 14px; border: 1px solid var(--linea); border-radius: 999px; background: var(--hoja); }
a.cuenta[aria-current="page"] { border-color: var(--tinta); }
a.btn { display: inline-block; text-decoration: none; }
.form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 14px; margin-bottom: 14px; }
.form-grid.una { grid-template-columns: 1fr; max-width: 420px; }
.form-grid label { display: grid; gap: 6px; font-weight: 600; font-size: .95rem; text-transform: capitalize; }
.form-grid input { width: 100%; padding: 11px 13px; border: 1px solid var(--linea); border-radius: 8px; background: #fff; }
label.check { display: flex !important; align-items: center; gap: 10px; }
label.check input { width: 20px; height: 20px; accent-color: var(--tinta); }
.error { color: var(--peligro); font-weight: 600; margin: 8px 0; }
.panel + .panel { margin-top: 16px; }
.tabla { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th { text-align: left; font-size: .85rem; color: var(--gris); text-transform: capitalize; padding: 8px; border-bottom: 2px solid var(--linea); }
td { padding: 10px 8px; border-bottom: 1px solid var(--linea); }
td.fin { text-align: right; white-space: nowrap; }

/* Chat */
.chat .mensajes { display: flex; flex-direction: column; gap: 10px; max-height: 55vh; overflow-y: auto; margin-bottom: 14px; padding: 4px; }
.msg { align-self: flex-start; max-width: 78%; background: var(--papel); padding: 10px 14px; border-radius: 4px 14px 14px 14px; }
.msg.mio { align-self: flex-end; background: var(--tinta); color: #fff; border-radius: 14px 4px 14px 14px; }
.msg strong { font-size: .8rem; opacity: .75; }
.msg p { margin: 2px 0 0; }
.msg img { display: block; max-width: 100%; max-height: 260px; border-radius: 8px; margin-top: 6px; }
.adjuntar { cursor: pointer; white-space: nowrap; }
img.miniatura { display: block; width: 56px; height: 56px; object-fit: cover; border-radius: 8px; border: 1px solid var(--linea); }
.form-grid input[type=file] { padding: 8px; }
.tarjetas { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 14px; }
a.tarjeta { display: block; background: var(--hoja); border: 1px solid var(--linea); border-left: 5px solid var(--tinta); border-radius: 10px; padding: 18px; color: var(--tinta); text-decoration: none; }
a.tarjeta:hover { border-color: var(--tinta); }
a.tarjeta b { display: block; font-size: 2rem; line-height: 1.1; }
a.tarjeta span { color: var(--gris); }