* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    background: #f4f7fb;
    color: #1f2937;
}

.contenedor-principal {
    width: 100%;
    max-width: 1180px;
    margin: 0 auto;
    padding: 20px;
}

.encabezado,
.pie,
.tarjeta,
.tabla-contenedor {
    background: #ffffff;
    border-radius: 12px;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
}

.encabezado {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
    padding: 20px;
    margin-bottom: 20px;
}

.encabezado h1 {
    margin: 0;
    color: #1d4ed8;
}

.encabezado p {
    margin: 6px 0 0;
    color: #6b7280;
}

nav a {
    text-decoration: none;
    color: #1f2937;
    margin-left: 15px;
    font-weight: bold;
}

nav a:hover {
    color: #1d4ed8;
}

.tarjeta {
    padding: 25px;
    margin-bottom: 20px;
}

.tarjeta h2 {
    margin-top: 0;
}

.formulario {
    display: grid;
    gap: 15px;
}

.formulario label {
    font-weight: bold;
    margin-bottom: 5px;
    display: block;
}

.formulario input,
.formulario select {
    width: 100%;
    padding: 12px;
    border: 1px solid #d1d5db;
    border-radius: 8px;
    font-size: 14px;
}

.boton,
.boton-secundario,
.boton-peligro {
    display: inline-block;
    text-decoration: none;
    border: none;
    padding: 11px 16px;
    border-radius: 8px;
    font-weight: bold;
    cursor: pointer;
    font-size: 14px;
}

.boton {
    background: #1d4ed8;
    color: #fff;
}

.boton:hover {
    background: #1e40af;
}

.boton-secundario {
    background: #f59e0b;
    color: #fff;
}

.boton-secundario:hover {
    background: #d97706;
}

.boton-peligro {
    background: #dc2626;
    color: #fff;
}

.boton-peligro:hover {
    background: #b91c1c;
}

.mensaje,
.error,
.exito {
    padding: 12px 14px;
    border-radius: 8px;
    margin-bottom: 15px;
    font-weight: bold;
}

.mensaje {
    background: #dbeafe;
    color: #1e3a8a;
}

.error {
    background: #fee2e2;
    color: #991b1b;
}

.exito {
    background: #dcfce7;
    color: #166534;
}

.tabla-contenedor {
    padding: 20px;
    overflow-x: auto;
}

.tabla {
    width: 100%;
    border-collapse: collapse;
}

.tabla th,
.tabla td {
    padding: 12px;
    border-bottom: 1px solid #e5e7eb;
    text-align: left;
    vertical-align: top;
}

.tabla th {
    background: #eff6ff;
}

.estado {
    font-weight: bold;
}

.estado-pendiente {
    color: #b45309;
}

.estado-confirmada {
    color: #15803d;
}

.estado-suspendida {
    color: #b91c1c;
}

.acciones {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.pie {
    padding: 18px;
    text-align: center;
    color: #6b7280;
}

.grid-dos {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

@media (max-width: 768px) {
    .encabezado {
        flex-direction: column;
        align-items: flex-start;
    }

    nav a {
        margin-left: 0;
        margin-right: 12px;
        display: inline-block;
        margin-top: 10px;
    }

    .grid-dos {
        grid-template-columns: 1fr;
    }
}