:root {
  --bg: #f4f6f9;
  --surface: #ffffff;
  --text: #0f172a;
  --muted: #526071;
  --border: #d9e0e8;
  --accent: #b6f03c;
  --accent-ink: #14210a;
  --accent-text: #3f6212;
  --danger: #b91c1c;
  --radius: 1rem;
  --shadow: 0 8px 30px rgb(15 23 42 / .08);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #090e1a;
    --surface: #101827;
    --text: #eef2f8;
    --muted: #a3b0c4;
    --border: #22304a;
    --accent-text: #b6f03c;
    --danger: #f87171;
    --shadow: none;
  }
}

*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  line-height: 1.5;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3 { line-height: 1.2; margin: 0; }
a { color: var(--accent-text); }
:focus-visible { outline: 3px solid var(--accent-text); outline-offset: 2px; }

/* Barra superior */
.topbar {
  position: sticky; top: 0; z-index: 5;
  display: flex; flex-wrap: wrap; align-items: center; gap: .5rem 1rem;
  padding: .75rem clamp(1rem, 3vw, 2rem);
  background: var(--surface); border-bottom: 1px solid var(--border);
}
.brand { font-weight: 800; font-size: 1.15rem; letter-spacing: -.02em; text-decoration: none; color: var(--text); margin-inline-end: auto; }
.quien { color: var(--muted); font-size: .92rem; }
.demo-banner {
  padding: .6rem 1rem; text-align: center; font-weight: 600; font-size: .92rem;
  background: var(--accent); color: var(--accent-ink);
}
.wrap { width: min(100% - 2rem, 76rem); margin: 1.5rem auto 3rem; }

/* Pestañas */
.tabs { display: flex; flex-wrap: wrap; gap: .4rem; margin-bottom: 1.25rem; }
.tabs button {
  padding: .5rem 1rem; font: inherit; font-weight: 650; cursor: pointer;
  color: var(--muted); background: transparent; border: 1px solid var(--border); border-radius: 999px;
}
.tabs button:hover { color: var(--text); }
.tabs button[aria-current="page"] { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }

/* Botones */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .4rem;
  padding: .6rem 1.1rem; font: inherit; font-weight: 700; text-decoration: none; cursor: pointer;
  border-radius: .8rem; border: 1px solid transparent;
}
.btn-primary { background: var(--accent); color: var(--accent-ink); }
.btn-primary:hover { filter: brightness(.95); }
.btn-ghost { background: transparent; color: var(--text); border-color: var(--border); }
.btn-ghost:hover { border-color: var(--muted); }
.btn-danger { background: transparent; color: var(--danger); border-color: var(--danger); }
.btn-sm { padding: .35rem .75rem; font-size: .9rem; }
.btn:disabled { opacity: .55; cursor: not-allowed; }
.link { padding: 0; font: inherit; font-weight: 700; color: var(--accent-text); background: none; border: 0; cursor: pointer; text-decoration: underline; }

/* Formularios */
.form { display: grid; gap: 1rem; }
.grid2 { display: grid; gap: 1rem; }
@media (min-width: 40rem) { .grid2 { grid-template-columns: 1fr 1fr; } }
.campo { display: grid; gap: .3rem; align-content: start; }
.campo label { font-weight: 650; font-size: .93rem; }
.campo small { color: var(--muted); }
input, select, textarea {
  width: 100%; padding: .6rem .75rem; font: inherit; color: var(--text);
  background: var(--bg); border: 1px solid var(--border); border-radius: .7rem;
}
textarea { min-height: 6rem; resize: vertical; }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: .88rem; min-height: 28rem; }
.check { display: flex; gap: .6rem; align-items: flex-start; }
.check input { width: 1.1rem; height: 1.1rem; margin-top: .2rem; accent-color: var(--accent-text); flex: none; }
.acciones { display: flex; flex-wrap: wrap; gap: .6rem; }
fieldset { margin: 0; padding: 1rem; border: 1px solid var(--border); border-radius: var(--radius); display: grid; gap: 1rem; }
legend { padding: 0 .5rem; font-weight: 700; }
.toolbar { display: flex; flex-wrap: wrap; gap: .75rem; margin-bottom: 1rem; }
.toolbar input[type="search"] { flex: 1 1 16rem; width: auto; }

/* Tarjetas y listas */
.card { padding: 1.25rem; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); }
.cards { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(12rem, 1fr)); margin-bottom: 1.25rem; }
.cifra { font-size: 2rem; font-weight: 800; letter-spacing: -.03em; }
.muted { color: var(--muted); }
.vacio { padding: 2rem 1rem; text-align: center; color: var(--muted); }
.aviso-caja { padding: 1rem 1.25rem; border-radius: var(--radius); border: 1px solid #d97706; background: rgb(217 119 6 / .12); margin-bottom: 1.25rem; }
.aviso-caja ul { margin: .5rem 0 .75rem; padding-inline-start: 1.25rem; }
.pila { display: grid; gap: 1rem; }
.cab-seccion { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: .75rem; }

/* Chips */
.chips { display: flex; flex-wrap: wrap; gap: .4rem; margin-bottom: 1rem; }
.chips button {
  padding: .3rem .8rem; font: inherit; font-size: .9rem; cursor: pointer;
  color: var(--text); background: var(--surface); border: 1px solid var(--border); border-radius: 999px;
}
.chips button[aria-pressed="true"] { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); font-weight: 700; }

/* Tablas */
.tabla-wrap { overflow-x: auto; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); }
table { width: 100%; border-collapse: collapse; font-size: .94rem; }
th, td { padding: .7rem .9rem; text-align: start; border-bottom: 1px solid var(--border); vertical-align: top; }
th { font-size: .82rem; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); white-space: nowrap; }
tbody tr:last-child td { border-bottom: 0; }
td.nowrap { white-space: nowrap; }
.caducada { color: var(--danger); font-weight: 650; }

/* Etiquetas de estado */
.badge { display: inline-block; padding: .1rem .6rem; border-radius: 999px; font-size: .82rem; font-weight: 650; white-space: nowrap; border: 1px solid var(--border); background: rgb(100 116 139 / .15); }
.be-diagnostico, .be-reparacion, .ba-enviando, .ba-enviado { background: rgb(37 99 235 / .15); border-color: rgb(37 99 235 / .5); }
.be-aprobacion, .be-repuesto { background: rgb(217 119 6 / .18); border-color: rgb(217 119 6 / .6); }
.be-listo, .ba-entregado, .ba-leido { background: rgb(22 163 74 / .18); border-color: rgb(22 163 74 / .6); }
.be-cancelado, .ba-fallido { background: rgb(220 38 38 / .15); border-color: rgb(220 38 38 / .6); }

/* Detalle */
.ficha { display: grid; gap: .5rem 1.25rem; margin: 0; }
@media (min-width: 40rem) { .ficha { grid-template-columns: 9rem 1fr; } }
.ficha dt { color: var(--muted); font-weight: 650; }
.ficha dd { margin: 0; overflow-wrap: anywhere; }
.seccion { padding-top: 1rem; margin-top: 1rem; border-top: 1px solid var(--border); display: grid; gap: .75rem; }
.seccion h3 { font-size: 1.05rem; }
.enlace { display: flex; gap: .5rem; }
.historial { margin: 0; padding-inline-start: 1.2rem; display: grid; gap: .4rem; }

/* Diálogo */
dialog {
  width: min(100% - 1.5rem, 44rem); padding: 0; color: var(--text);
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
}
dialog::backdrop { background: rgb(0 0 0 / .55); }
.dlg-cab { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: 1rem 1.25rem; border-bottom: 1px solid var(--border); }
.dlg-cab h2 { font-size: 1.2rem; }
.dlg-body { padding: 1.25rem; max-height: 75vh; overflow-y: auto; }

/* Acceso */
.login { width: min(100% - 2rem, 26rem); margin: 8vh auto; }
.login h1 { font-size: 1.6rem; margin-bottom: .25rem; }
.login .form { margin-top: 1.25rem; }
.error { color: var(--danger); font-weight: 600; min-height: 1.4rem; margin: 0; }
.demo-box { margin-top: 1.5rem; padding-top: 1.25rem; border-top: 1px solid var(--border); display: grid; gap: .6rem; }
.demo-box p { margin: 0; color: var(--muted); font-size: .92rem; }

/* Aviso emergente */
.toast {
  position: fixed; inset-inline: 1rem; bottom: 1rem; z-index: 20; margin-inline: auto; width: fit-content; max-width: 30rem;
  padding: .75rem 1.1rem; border-radius: .8rem; font-weight: 600;
  background: var(--accent); color: var(--accent-ink); box-shadow: var(--shadow);
}
.toast-error { background: var(--danger); color: #fff; }