:root {
    --bg: #0f172a;
    --sidebar: #111827;
    --sidebar-2: #1f2937;
    --accent: #2563eb;
    --accent-2: #1d4ed8;
    --text: #e5e7eb;
    --muted: #94a3b8;
    --card: #ffffff;
    --card-text: #1e293b;
    --border: #e2e8f0;
    --ok: #16a34a;
    --warn: #d97706;
    --err: #dc2626;
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
    background: #f1f5f9;
    color: var(--card-text);
    font-size: 15px;
}

h1 { font-size: 1.5rem; margin: 0 0 .25rem; }
h2 { font-size: 1.1rem; margin: 0 0 .75rem; }
a { color: var(--accent); }
.muted { color: var(--muted); }

/* ---------- Layout con barra lateral ---------- */
.layout { display: flex; min-height: 100vh; }

.sidebar {
    width: 230px;
    background: linear-gradient(180deg, var(--sidebar), var(--sidebar-2));
    color: var(--text);
    display: flex;
    flex-direction: column;
    padding: 1.25rem 0;
    flex-shrink: 0;
}
.brand {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: .5px;
    padding: 0 1.25rem 1.25rem;
    color: #fff;
}
.brand span { color: #60a5fa; font-weight: 400; }
.nav-items { display: flex; flex-direction: column; gap: 2px; padding: 0 .5rem; flex: 1; }
.nav-item {
    display: flex; align-items: center; gap: .6rem;
    padding: .6rem .75rem;
    border-radius: 8px;
    color: var(--text);
    text-decoration: none;
    font-size: .95rem;
}
.nav-item .ico { opacity: .8; width: 1.1rem; text-align: center; }
.nav-item:hover { background: rgba(255,255,255,.06); }
.nav-item.active { background: var(--accent); color: #fff; }
.sidebar-foot { padding: 1rem 1.25rem 0; color: var(--muted); font-size: .78rem; }

.main { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.topbar {
    height: 56px;
    background: #fff;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 1rem;
    padding: 0 1.5rem;
}
.user { display: inline-flex; align-items: center; gap: .5rem; color: #334155; font-weight: 600; }
.user-dot { width: 9px; height: 9px; border-radius: 50%; background: var(--ok); display: inline-block; }
.logout-form { margin: 0; }
.btn-link {
    background: none; border: none; color: var(--accent); cursor: pointer;
    font-size: .9rem; padding: .3rem .5rem;
}
.btn-link:hover { text-decoration: underline; }

.content { padding: 1.75rem; }

/* ---------- Tarjetas y estadísticas ---------- */
.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.25rem 1.5rem;
    margin-top: 1.25rem;
    box-shadow: 0 1px 2px rgba(0,0,0,.04);
}
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 1rem; margin-top: 1.25rem; }
.stat {
    background: #fff; border: 1px solid var(--border); border-radius: 12px;
    padding: 1.1rem 1.25rem; box-shadow: 0 1px 2px rgba(0,0,0,.04);
}
.stat-num { font-size: 2rem; font-weight: 700; color: var(--accent); line-height: 1; }
.stat-lbl { color: #475569; margin-top: .4rem; font-size: .9rem; }
.stat-foot { color: var(--muted); font-size: .78rem; margin-top: .2rem; }
.stat-warn .stat-num { color: var(--warn); }

.checklist { margin: 0; padding-left: 1.1rem; line-height: 1.9; }

/* ---------- Login ---------- */
.auth-shell {
    min-height: 100vh;
    display: flex; align-items: center; justify-content: center;
    background: linear-gradient(135deg, #0f172a, #1e3a8a);
    padding: 1rem;
}
.auth-card {
    background: #fff; border-radius: 16px; padding: 2.25rem;
    width: 100%; max-width: 380px;
    box-shadow: 0 20px 50px rgba(0,0,0,.35);
}
.auth-brand { font-size: 1.6rem; font-weight: 700; text-align: center; }
.auth-brand span { color: var(--accent); font-weight: 400; }
.auth-sub { text-align: center; color: var(--muted); margin: .25rem 0 1.5rem; }
.auth-form { display: flex; flex-direction: column; }

/* ---------- Formularios ---------- */
label { font-size: .85rem; color: #475569; margin: .75rem 0 .3rem; font-weight: 600; }
.input {
    width: 100%; padding: .6rem .75rem;
    border: 1px solid #cbd5e1; border-radius: 8px; font-size: .95rem;
    background: #fff; color: var(--card-text);
}
.input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(37,99,235,.15); }
.btn-primary {
    margin-top: 1.25rem; padding: .65rem 1rem;
    background: var(--accent); color: #fff; border: none; border-radius: 8px;
    font-size: .95rem; font-weight: 600; cursor: pointer;
}
.btn-primary:hover { background: var(--accent-2); }

.alert-error { background: #fef2f2; color: var(--err); border: 1px solid #fecaca; padding: .6rem .8rem; border-radius: 8px; margin-bottom: .75rem; font-size: .9rem; }
.alert-ok    { background: #f0fdf4; color: var(--ok);  border: 1px solid #bbf7d0; padding: .6rem .8rem; border-radius: 8px; margin-bottom: .75rem; font-size: .9rem; }
.validation-message { color: var(--err); font-size: .8rem; }

/* ---------- Encabezado de página y toolbar ---------- */
.page-head { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.toolbar { display: flex; align-items: center; gap: .5rem; margin-top: 1rem; }
.search { max-width: 360px; }
.mt { margin-top: 1rem; }
.spacer { flex: 1; }

/* ---------- Tabla ---------- */
.card.no-pad { padding: 0; overflow: hidden; }
.grid { width: 100%; border-collapse: collapse; font-size: .92rem; }
.grid thead th {
    text-align: left; padding: .7rem 1rem; background: #f8fafc;
    border-bottom: 1px solid var(--border); color: #475569; font-weight: 600; white-space: nowrap;
}
.grid tbody td { padding: .6rem 1rem; border-bottom: 1px solid #f1f5f9; }
.grid tbody tr:last-child td { border-bottom: none; }
.grid tbody tr:hover { background: #f8fafc; }
.grid .num { text-align: right; }
.grid .right { text-align: right; }
.center { text-align: center; padding: 1.5rem !important; }
.mono { font-family: "Cascadia Code", Consolas, monospace; font-size: .88rem; }

.chip { background: #eef2ff; color: #4338ca; border-radius: 999px; padding: .1rem .55rem; font-size: .8rem; }
.badge { border-radius: 6px; padding: .12rem .5rem; font-size: .78rem; font-weight: 600; }
.badge-ok   { background: #dcfce7; color: #166534; }
.badge-warn { background: #fef3c7; color: #92400e; }
.badge-off  { background: #e2e8f0; color: #475569; }

/* ---------- Formulario de cliente ---------- */
.form-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: .35rem 1.25rem; }
.fld { display: flex; flex-direction: column; }
.fld.col-2 { grid-column: span 2; }
.serial-row { display: flex; gap: .5rem; align-items: center; }
.serial-row .input { flex: 1; }
.chk { display: inline-flex; align-items: center; gap: .4rem; font-weight: 400; color: var(--card-text); margin: .15rem 0; }
.chk input { width: auto; }
.chk-list { display: flex; flex-wrap: wrap; gap: .5rem 1.25rem; }
.form-actions { display: flex; align-items: center; gap: .75rem; margin-top: 1.25rem; }
.confirm { color: var(--err); font-weight: 600; }
.mono.input { letter-spacing: .5px; }
input[readonly] { background: #f1f5f9; color: #64748b; }

/* ---------- Botones secundarios / peligro ---------- */
.btn-secondary {
    padding: .55rem .9rem; background: #fff; color: var(--accent);
    border: 1px solid var(--accent); border-radius: 8px; font-weight: 600; cursor: pointer; font-size: .9rem;
    text-decoration: none; display: inline-block;
}
.btn-secondary:hover { background: #eff6ff; }
.btn-danger {
    padding: .55rem .9rem; background: var(--err); color: #fff; border: none;
    border-radius: 8px; font-weight: 600; cursor: pointer; font-size: .9rem;
}
.btn-danger:hover { background: #b91c1c; }
.btn-danger-outline {
    padding: .55rem .9rem; background: #fff; color: var(--err);
    border: 1px solid #fca5a5; border-radius: 8px; font-weight: 600; cursor: pointer; font-size: .9rem;
}
.btn-danger-outline:hover { background: #fef2f2; }
a.btn-primary { text-decoration: none; display: inline-block; }
small.muted { font-size: .78rem; margin-top: .2rem; }
.small { font-size: .8rem; }
.muted.small { color: var(--muted); }
.btn-link.danger { color: var(--err); }
.btn-link.danger:hover { color: #b91c1c; }
textarea.input { resize: vertical; font-size: .85rem; line-height: 1.4; width: 100%; }
.grid .btn-link { padding: .2rem .4rem; }
.grid.inner { margin-top: .5rem; }
.grid.inner thead th { background: #f8fafc; }
.canal-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 1.5rem; margin-top: 1rem; }
.asignar-form, .promover-form { display: flex; align-items: center; gap: .5rem; margin: 0; }
.asignar-form span { color: #475569; font-size: .9rem; }
input[type=file].input { padding: .45rem; background: #fff; }
.alert-card { border-color: #fcd34d; background: #fffbeb; }
.alert-card h2 { color: #92400e; }
.alerta-txt { color: #92400e; font-weight: 600; font-size: .88rem; }
.num.dias-warn { color: var(--err); font-weight: 700; }
.req { color: var(--err); font-weight: 700; }
h2 .req { font-size: 1rem; }

@media (max-width: 720px) {
    .sidebar { width: 64px; }
    .brand, .sidebar-foot, .nav-item span:not(.ico) { display: none; }
    .form-grid { grid-template-columns: 1fr; }
    .fld.col-2 { grid-column: span 1; }
}