:root {
    --color-fondo: #0f172a;
    --color-superficie: #1e293b;
    --color-superficie-2: #273449;
    --color-borde: #334155;
    --color-texto: #e2e8f0;
    --color-texto-tenue: #94a3b8;
    --color-primario: #25d366;      /* verde WhatsApp */
    --color-primario-oscuro: #128c7e;
    --color-peligro: #ef4444;
    --color-exito: #22c55e;
    --color-aviso: #f59e0b;
    --radio: 10px;
    --sombra: 0 8px 24px rgba(0,0,0,.35);
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
    background: var(--color-fondo);
    color: var(--color-texto);
    height: 100%;
}

.cargando-inicial { padding: 3rem; text-align: center; color: var(--color-texto-tenue); }

/* ---------- Layout ---------- */
.app-shell { display: flex; min-height: 100vh; }
.sidebar {
    width: 240px;
    background: var(--color-superficie);
    border-right: 1px solid var(--color-borde);
    display: flex;
    flex-direction: column;
    padding: 1rem;
}
.sidebar .marca { font-size: 1.2rem; font-weight: 700; margin-bottom: 1.5rem; display: flex; gap: .5rem; align-items: center; }
.sidebar .marca .logo { color: var(--color-primario); font-size: 1.5rem; }
.nav-item {
    display: flex; align-items: center; gap: .6rem;
    padding: .6rem .8rem; border-radius: var(--radio);
    color: var(--color-texto-tenue); text-decoration: none; margin-bottom: .25rem;
}
.nav-item:hover { background: var(--color-superficie-2); color: var(--color-texto); }
.nav-item.active { background: var(--color-primario-oscuro); color: #fff; }
.sidebar .usuario { margin-top: auto; font-size: .85rem; color: var(--color-texto-tenue); }
.sidebar .usuario button { margin-top: .5rem; }

.main { flex: 1; padding: 1.5rem 2rem; overflow-x: auto; }
.page-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1.25rem; gap: 1rem; }
.page-header h1 { font-size: 1.4rem; margin: 0; }

/* ---------- Botones ---------- */
.btn { border: none; border-radius: var(--radio); padding: .55rem 1rem; cursor: pointer; font-weight: 600; font-size: .9rem; }
.btn-primario { background: var(--color-primario); color: #05240f; }
.btn-primario:hover { background: var(--color-primario-oscuro); color: #fff; }
.btn-secundario { background: var(--color-superficie-2); color: var(--color-texto); border: 1px solid var(--color-borde); }
.btn-peligro { background: var(--color-peligro); color: #fff; }
.btn:disabled { opacity: .55; cursor: not-allowed; }
.btn-tabla { padding: .3rem .6rem; font-size: .8rem; margin-right: .25rem; }

/* ---------- Tabla ---------- */
.tabla-wrap { overflow-x: auto; }
table.items { width: 100%; border-collapse: collapse; background: var(--color-superficie); border-radius: var(--radio); overflow: hidden; }
table.items th, table.items td { padding: .7rem .9rem; text-align: left; border-bottom: 1px solid var(--color-borde); font-size: .9rem; }
table.items th { color: var(--color-texto-tenue); font-weight: 600; text-transform: uppercase; font-size: .72rem; letter-spacing: .04em; }
.badge { padding: .18rem .55rem; border-radius: 999px; font-size: .72rem; font-weight: 700; }
.badge-activo { background: rgba(34,197,94,.18); color: var(--color-exito); }
.badge-inactivo { background: rgba(239,68,68,.18); color: var(--color-peligro); }
code.mono { background: var(--color-superficie-2); padding: .15rem .4rem; border-radius: 6px; font-size: .82rem; }

/* ---------- Formularios ---------- */
.form-grupo { margin-bottom: .9rem; display: flex; flex-direction: column; gap: .3rem; }
.form-grupo label { font-size: .82rem; color: var(--color-texto-tenue); }
.input, .textarea {
    background: var(--color-superficie-2); border: 1px solid var(--color-borde);
    border-radius: var(--radio); padding: .55rem .7rem; color: var(--color-texto); font-size: .92rem; width: 100%;
}
.textarea { min-height: 90px; resize: vertical; font-family: inherit; }
.input:focus, .textarea:focus { outline: none; border-color: var(--color-primario); }

/* ---------- Modales (fondo SÓLIDO) ---------- */
.modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,.6); display: flex; align-items: center; justify-content: center; z-index: 50; padding: 1rem; }
.modal-box { background: var(--color-superficie); border: 1px solid var(--color-borde); border-radius: var(--radio); box-shadow: var(--sombra); width: 100%; max-width: 480px; padding: 1.5rem; }
.modal-box h2 { margin-top: 0; font-size: 1.15rem; }
.modal-acciones { display: flex; justify-content: flex-end; gap: .6rem; margin-top: 1.2rem; }
.mensaje-error { color: var(--color-peligro); font-size: .85rem; margin: .3rem 0; }
.aviso { background: rgba(245,158,11,.12); border: 1px solid var(--color-aviso); color: var(--color-aviso); padding: .6rem .8rem; border-radius: var(--radio); font-size: .85rem; margin-bottom: 1rem; }

/* ---------- Login ---------- */
.login-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 1rem; }
.login-card { background: var(--color-superficie); border: 1px solid var(--color-borde); border-radius: 16px; box-shadow: var(--sombra); width: 100%; max-width: 380px; padding: 2rem; }
.login-card .marca { text-align: center; font-size: 1.4rem; font-weight: 700; margin-bottom: 1.5rem; }
.login-card .marca .logo { color: var(--color-primario); }

/* ---------- Toasts ---------- */
.toasts { position: fixed; top: 1rem; right: 1rem; display: flex; flex-direction: column; gap: .5rem; z-index: 100; }
.toast { padding: .7rem 1rem; border-radius: var(--radio); color: #fff; box-shadow: var(--sombra); font-size: .88rem; min-width: 220px; }
.toast-success { background: var(--color-exito); color: #05240f; }
.toast-error { background: var(--color-peligro); }
.toast-info { background: var(--color-primario-oscuro); }

.empty-state { text-align: center; color: var(--color-texto-tenue); padding: 3rem; }
.qr-box { text-align: center; padding: 1rem; }
.qr-box img { max-width: 280px; background: #fff; padding: 12px; border-radius: 12px; }

#blazor-error-ui { display: none; position: fixed; bottom: 0; left: 0; right: 0; background: #b91c1c; color: #fff; padding: .8rem 1rem; z-index: 200; }
#blazor-error-ui .reload, #blazor-error-ui .dismiss { color: #fff; margin-left: 1rem; cursor: pointer; }