/* ============================================================
   ARCHIVO: assets/css/estilos.css
   Para qué sirve: el diseño visual de todo el sistema
   ============================================================ */

/* --- Variables de color. Cambiá PRIMARY para cambiar el tema --- */
:root {
    --primario:       #1e3a5f;      /* azul oscuro del menú */
    --primario-medio: #2563a8;      /* azul botones */
    --primario-claro: #3b82f6;      /* azul links */
    --acento:         #f59e0b;      /* naranja/dorado para resaltar */
    --fondo:          #f1f5f9;      /* fondo gris claro de la app */
    --blanco:         #ffffff;
    --texto:          #1e293b;      /* texto principal */
    --texto-suave:    #64748b;      /* texto secundario */
    --borde:          #e2e8f0;
    --sombra:         0 1px 6px rgba(0,0,0,0.08);
    --radio:          8px;
    --sidebar-ancho:  250px;
}

/* --- Reset básico --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body {
    font-family: 'Segoe UI', system-ui, sans-serif;
    background: var(--fondo);
    color: var(--texto);
    font-size: 14px;
    line-height: 1.5;
}
a { color: var(--primario-claro); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ============================================================
   LAYOUT PRINCIPAL
   ============================================================ */
.layout {
    display: flex;
    min-height: 100vh;
}

/* ============================================================
   MENÚ LATERAL (SIDEBAR)
   ============================================================ */
.sidebar {
    width: var(--sidebar-ancho);
    background: var(--primario);
    position: fixed;
    top: 0; left: 0;
    height: 100vh;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    z-index: 200;
    transition: transform 0.3s;
}

/* Logo arriba del menú */
.sidebar-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 18px 16px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}
.sidebar-logo img { width: 38px; height: 38px; object-fit: contain; }
.sidebar-logo strong { display: block; color: #fff; font-size: 14px; }
.sidebar-logo span   { font-size: 11px; color: rgba(255,255,255,0.5); }

/* Lista de ítems del menú */
.sidebar-menu {
    list-style: none;
    padding: 8px 0;
    flex: 1;
}
.menu-seccion {
    padding: 14px 16px 5px;
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: rgba(255,255,255,0.35);
}
.sidebar-menu a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 9px 16px;
    color: rgba(255,255,255,0.75);
    font-size: 13.5px;
    text-decoration: none;
    border-left: 3px solid transparent;
    transition: all 0.15s;
}
.sidebar-menu a:hover {
    background: rgba(255,255,255,0.08);
    color: #fff;
}
.sidebar-menu a.activo,
.sidebar-menu a:hover {
    border-left-color: var(--acento);
    color: #fff;
}
.sidebar-menu a.activo {
    background: rgba(255,255,255,0.12);
}
.sidebar-menu i { width: 18px; text-align: center; font-size: 14px; }

/* ═══════════════════════════════════════
   MENÚ LATERAL JERÁRQUICO (sidebar-nav)
   ═══════════════════════════════════════ */
.sidebar-nav {
    flex: 1;
    overflow-y: auto;
    padding: 6px 0 12px;
}

/* Links directos (Dashboard, Vencimientos) */
.snav-link {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 9px 16px;
    color: rgba(255,255,255,0.75);
    font-size: 13.5px;
    text-decoration: none;
    border-left: 3px solid transparent;
    transition: all 0.15s;
    position: relative;
}
.snav-link:hover,
.snav-link.activo {
    background: rgba(255,255,255,0.08);
    color: #fff;
    border-left-color: var(--acento);
}
.snav-link.activo { background: rgba(255,255,255,0.12); }
.snav-link i { width: 18px; text-align: center; font-size: 13px; }
.snav-badge {
    margin-left: auto;
    background: #ef4444;
    color: #fff;
    border-radius: 99px;
    font-size: 10px;
    font-weight: 700;
    padding: 1px 6px;
}

/* Bloque de módulo (Compras, Ventas, etc.) */
.snav-modulo { border-bottom: 1px solid rgba(255,255,255,0.06); }

.snav-mod-btn {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 11px 16px;
    background: none;
    border: none;
    border-left: 3px solid transparent;
    color: rgba(255,255,255,0.85);
    font-size: 12.5px;
    font-weight: 700;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    cursor: pointer;
    transition: all 0.15s;
}
.snav-mod-btn span {
    display: flex;
    align-items: center;
    gap: 9px;
}
.snav-mod-btn i { width: 18px; text-align: center; font-size: 13px; }
.snav-mod-btn:hover,
.snav-mod-btn.open {
    background: rgba(255,255,255,0.08);
    color: #fff;
    border-left-color: var(--acento);
}
.snav-pronto { opacity: 0.45; }
.snav-pronto:hover { opacity: 0.65; }

/* Chevron rota al abrir */
.snav-chevron {
    font-size: 10px !important;
    width: auto !important;
    transition: transform 0.2s;
}
.snav-mod-btn.open .snav-chevron { transform: rotate(90deg); }

/* Cuerpo colapsable */
.snav-mod-body {
    display: none;
    background: rgba(0,0,0,0.18);
    border-left: 2px solid rgba(255,255,255,0.07);
    margin-left: 10px;
}
.snav-mod-body.open { display: block; }

/* Etiqueta de sub-sección dentro del módulo */
.snav-grupo {
    padding: 8px 14px 3px;
    font-size: 9.5px;
    font-weight: 700;
    letter-spacing: 0.9px;
    text-transform: uppercase;
    color: rgba(255,255,255,0.3);
}

/* Links dentro del módulo */
.snav-sub {
    display: flex;
    align-items: center;
    gap: 9px;
    padding: 7px 14px 7px 16px;
    color: rgba(255,255,255,0.7);
    font-size: 13px;
    text-decoration: none;
    border-left: 2px solid transparent;
    transition: all 0.12s;
}
.snav-sub:hover {
    background: rgba(255,255,255,0.07);
    color: #fff;
    border-left-color: var(--acento);
}
.snav-sub i { width: 16px; text-align: center; font-size: 12px; }
.snav-dim { opacity: 0.35; cursor: default; pointer-events: none; }
/* Pie del menú: usuario */
.sidebar-pie {
    padding: 14px 16px;
    border-top: 1px solid rgba(255,255,255,0.1);
}
.sidebar-usuario {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
}
.sidebar-usuario strong { display: block; color: #fff; font-size: 13px; }
.sidebar-usuario span   { font-size: 11px; color: rgba(255,255,255,0.5); }
.avatar-chico {
    width: 32px; height: 32px;
    background: var(--acento);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-weight: 700; color: #fff; font-size: 12px;
    flex-shrink: 0;
}
.btn-logout {
    display: flex; align-items: center; gap: 6px;
    color: rgba(255,255,255,0.6) !important;
    font-size: 12.5px;
    text-decoration: none !important;
    padding: 6px 8px;
    border-radius: 6px;
    transition: all 0.15s;
}
.btn-logout:hover { background: rgba(255,255,255,0.08); color: #fff !important; }

/* ============================================================
   CONTENIDO PRINCIPAL
   ============================================================ */
.contenido-principal {
    margin-left: var(--sidebar-ancho);
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Barra superior */
.topbar {
    background: var(--blanco);
    border-bottom: 1px solid var(--borde);
    padding: 0 24px;
    height: 56px;
    display: flex;
    align-items: center;
    gap: 16px;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--sombra);
}
.topbar-titulo {
    font-size: 16px;
    font-weight: 600;
    color: var(--primario);
    flex: 1;
}
.topbar-usuario {
    display: flex; align-items: center; gap: 10px;
    font-size: 13px; color: var(--texto-suave);
}
.avatar {
    width: 34px; height: 34px;
    background: var(--primario-medio);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-weight: 700; color: #fff; font-size: 13px;
}
.btn-menu-movil {
    display: none;
    background: none; border: none;
    font-size: 20px; cursor: pointer;
    color: var(--texto); padding: 4px 8px;
}

/* Área de contenido de la página */
.main {
    padding: 24px;
    flex: 1;
}

/* ============================================================
   CABECERA DE PÁGINA
   ============================================================ */
.pagina-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 12px;
}
.pagina-titulo {
    font-size: 20px;
    font-weight: 700;
    color: var(--primario);
}
.pagina-subtitulo {
    font-size: 13px;
    color: var(--texto-suave);
    margin-top: 2px;
}

/* ============================================================
   TARJETAS (CARDS)
   ============================================================ */
.card {
    background: var(--blanco);
    border: 1px solid var(--borde);
    border-radius: var(--radio);
    box-shadow: var(--sombra);
    margin-bottom: 20px;
}
.card-header {
    padding: 14px 20px;
    border-bottom: 1px solid var(--borde);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}
.card-titulo {
    font-size: 14px;
    font-weight: 600;
    color: var(--primario);
}
.card-body   { padding: 20px; }
.card-footer {
    padding: 12px 20px;
    border-top: 1px solid var(--borde);
    background: #f8fafc;
    border-radius: 0 0 var(--radio) var(--radio);
}

/* ============================================================
   TARJETAS ESTADÍSTICAS (DASHBOARD)
   ============================================================ */
.stats-grilla {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}
.stat-card {
    background: var(--blanco);
    border: 1px solid var(--borde);
    border-radius: var(--radio);
    box-shadow: var(--sombra);
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 16px;
    transition: transform 0.2s, box-shadow 0.2s;
}
.stat-card:hover { transform: translateY(-2px); box-shadow: 0 4px 12px rgba(0,0,0,0.1); }
.stat-icono {
    width: 50px; height: 50px;
    border-radius: 10px;
    display: flex; align-items: center; justify-content: center;
    font-size: 22px; flex-shrink: 0;
}
.stat-icono.azul    { background: #dbeafe; color: #2563a8; }
.stat-icono.verde   { background: #d1fae5; color: #16a34a; }
.stat-icono.naranja { background: #fef3c7; color: #d97706; }
.stat-icono.rojo    { background: #fee2e2; color: #dc2626; }
.stat-valor { font-size: 22px; font-weight: 700; color: var(--primario); }
.stat-label { font-size: 12px; color: var(--texto-suave); }

/* ============================================================
   TABLAS
   ============================================================ */
.tabla-contenedor { overflow-x: auto; }
table.tabla {
    width: 100%;
    border-collapse: collapse;
    font-size: 13.5px;
}
table.tabla thead th {
    padding: 9px 14px;
    text-align: left;
    font-size: 11.5px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.4px;
    color: var(--texto-suave);
    background: #f8fafc;
    border-bottom: 2px solid var(--borde);
    white-space: nowrap;
}
table.tabla tbody td {
    padding: 10px 14px;
    border-bottom: 1px solid #f1f5f9;
    vertical-align: middle;
}
table.tabla tbody tr:last-child td { border-bottom: none; }
table.tabla tbody tr:hover         { background: #f8fafc; }
table.tabla .derecha  { text-align: right; }
table.tabla .centrado { text-align: center; }

/* ============================================================
   FORMULARIOS
   ============================================================ */
.formulario-grilla {
    display: grid;
    gap: 16px;
}
.formulario-grilla.col2 { grid-template-columns: 1fr 1fr; }
.formulario-grilla.col3 { grid-template-columns: 1fr 1fr 1fr; }
.formulario-grilla .ancho-total { grid-column: 1 / -1; }

.campo { margin-bottom: 16px; }
.campo label {
    display: block;
    font-size: 12.5px;
    font-weight: 600;
    color: var(--texto);
    margin-bottom: 5px;
}
.campo label.requerido::after { content: ' *'; color: #dc2626; }
.campo input[type="text"],
.campo input[type="email"],
.campo input[type="number"],
.campo input[type="date"],
.campo input[type="password"],
.campo select,
.campo textarea {
    width: 100%;
    padding: 8px 11px;
    border: 1.5px solid var(--borde);
    border-radius: 6px;
    font-size: 13.5px;
    color: var(--texto);
    background: #fff;
    outline: none;
    transition: border-color 0.15s;
}
.campo input:focus, .campo select:focus, .campo textarea:focus {
    border-color: var(--primario-claro);
}
.campo-con-icono { position: relative; }
.campo-con-icono input { padding-right: 38px; }
.campo-con-icono .btn-ver-pass {
    position: absolute; right: 8px; top: 50%;
    transform: translateY(-50%);
    background: none; border: none; cursor: pointer;
    color: var(--texto-suave); font-size: 14px;
}
.campo-ayuda { font-size: 12px; color: var(--texto-suave); margin-top: 4px; }

/* ============================================================
   BOTONES
   ============================================================ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border: none;
    border-radius: 6px;
    font-size: 13.5px;
    font-weight: 500;
    cursor: pointer;
    text-decoration: none !important;
    transition: all 0.15s;
    white-space: nowrap;
}
.btn:hover { opacity: 0.88; transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn-sm   { padding: 5px 11px; font-size: 12px; }
.btn-bloque { width: 100%; justify-content: center; padding: 10px; font-size: 15px; }

.btn-primario    { background: var(--primario-medio); color: #fff; }
.btn-verde       { background: #16a34a; color: #fff; }
.btn-rojo        { background: #dc2626; color: #fff; }
.btn-naranja     { background: #d97706; color: #fff; }
.btn-gris        { background: #64748b; color: #fff; }
.btn-blanco      { background: #fff; color: var(--texto); border: 1.5px solid var(--borde); }
.btn-blanco:hover { background: #f8fafc; }

/* ============================================================
   BADGES / ETIQUETAS DE ESTADO
   ============================================================ */
.badge {
    display: inline-block;
    padding: 3px 9px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.3px;
}
.badge-verde   { background: #d1fae5; color: #065f46; }
.badge-rojo    { background: #fee2e2; color: #991b1b; }
.badge-naranja { background: #fef3c7; color: #92400e; }
.badge-azul    { background: #dbeafe; color: #1e40af; }
.badge-gris    { background: #f1f5f9; color: #475569; }

/* ============================================================
   ALERTAS / MENSAJES
   ============================================================ */
.alerta {
    padding: 12px 16px;
    border-radius: 7px;
    margin-bottom: 16px;
    font-size: 13.5px;
    display: flex;
    align-items: center;
    gap: 10px;
}
.alerta-verde   { background: #d1fae5; color: #065f46; border: 1px solid #a7f3d0; }
.alerta-rojo    { background: #fee2e2; color: #991b1b; border: 1px solid #fca5a5; }
.alerta-naranja { background: #fef3c7; color: #92400e; border: 1px solid #fde68a; }
.alerta-azul    { background: #dbeafe; color: #1e40af; border: 1px solid #93c5fd; }

/* ============================================================
   FILTROS DE BÚSQUEDA
   ============================================================ */
.filtros {
    background: var(--blanco);
    border: 1px solid var(--borde);
    border-radius: var(--radio);
    padding: 16px 20px;
    margin-bottom: 16px;
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: flex-end;
}
.filtros .campo { margin-bottom: 0; flex: 1; min-width: 140px; }

/* ============================================================
   TABLA DE ÍTEMS DEL COMPROBANTE
   ============================================================ */
.items-tabla th {
    background: #f0f4f8 !important;
    padding: 8px 10px !important;
    font-size: 11.5px !important;
}
.items-tabla td { padding: 6px 8px !important; }
.items-tabla input, .items-tabla select {
    padding: 5px 8px !important;
    font-size: 13px !important;
}
.fila-totales td {
    background: #f8fafc;
    font-weight: 700;
    border-top: 2px solid var(--borde) !important;
}

/* ============================================================
   SIN PERMISO
   ============================================================ */
.sin-permiso {
    text-align: center;
    padding: 60px 20px;
    color: var(--texto-suave);
}
.sin-permiso h2 { font-size: 28px; margin-bottom: 12px; }
.sin-permiso a  { color: var(--primario-claro); }

/* ============================================================
   PANTALLA DE LOGIN
   ============================================================ */
.pagina-login {
    background: linear-gradient(135deg, var(--primario) 0%, var(--primario-medio) 100%);
}
.login-fondo {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}
.login-caja {
    background: #fff;
    border-radius: 14px;
    padding: 36px;
    width: 100%;
    max-width: 400px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.25);
}
.login-header { text-align: center; margin-bottom: 28px; }
.login-logo   { width: 70px; height: 70px; object-fit: contain; margin-bottom: 12px; }
.login-header h1 { font-size: 22px; color: var(--primario); }
.login-header p  { color: var(--texto-suave); font-size: 13px; margin-top: 4px; }
.login-ayuda {
    margin-top: 24px;
    padding-top: 16px;
    border-top: 1px solid var(--borde);
    font-size: 12px;
    color: var(--texto-suave);
    text-align: center;
    line-height: 1.8;
}

/* ============================================================
   OVERLAY PARA MÓVIL
   ============================================================ */
#overlay-menu {
    display: none;
    position: fixed; inset: 0;
    background: rgba(0,0,0,0.4);
    z-index: 199;
}

/* ============================================================
   RESPONSIVE (MÓVIL)
   ============================================================ */
@media (max-width: 768px) {
    .sidebar { transform: translateX(-100%); }
    .sidebar.abierto { transform: translateX(0); }
    .contenido-principal { margin-left: 0; }
    .btn-menu-movil { display: block; }
    .formulario-grilla.col2,
    .formulario-grilla.col3 { grid-template-columns: 1fr; }
    .filtros .campo { min-width: 100%; }
    .stats-grilla   { grid-template-columns: 1fr 1fr; }
}

/* ============================================================
   UTILIDADES
   ============================================================ */
.texto-verde   { color: #16a34a !important; }
.texto-rojo    { color: #dc2626 !important; }
.texto-naranja { color: #d97706 !important; }
.texto-suave   { color: var(--texto-suave) !important; }
.negrita       { font-weight: 700 !important; }
.derecha       { text-align: right !important; }
.centrado      { text-align: center !important; }
.separador     { border: none; border-top: 1px solid var(--borde); margin: 20px 0; }
.flex-fila     { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }